temporal-polyfill - npm Package Compare versions

Comparing version 0.0.5 to 0.0.6

dist/global.js

@@ -1,2 +0,2 @@
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Kt(n,e,t,o){n=Jt(n=Gt(n,e.years,t,o),e.months,t,o);let r=t.epochMilliseconds(n.year,n.month,n.day);const[,i]=function(n){const e=gt($t(n)),t=e/T;return[vt(e-t*T,5),new Duration(n.years,n.months,n.weeks,n.days+Number(t))]}(e);return r=nn(r,7*i.weeks+i.days),Q(r)}function Gt({year:n,month:t,day:o},r,i,s){n+=r;const a=e(t,1,i.monthsInYear(n),s);let c=t===a?o:1;return c=e(c,1,i.daysInMonth(n,a),s),{year:n,month:a,day:c}}function Jt({year:n,month:t,day:o},r,i,s){if(r){if(t+=r,r<0)for(;t<1;)t+=i.monthsInYear(--n);else{let e;for(;t>(e=i.monthsInYear(n));)t-=e,n++}o=e(o,1,i.daysInMonth(n,t),s)}return{year:n,month:t,day:o}}function Qt(n,e){return e?{...Q(nn(W(n),e)),calendar:n.calendar}:n}var PlainMonthDay=class extends M{constructor(n,e,t=Zo(),o){super({...to({isoYear:o??("iso8601"===t.id?1972:function(n,e){throw new n(e)}(Error,"Must specify referenceYear")),isoMonth:n,isoDay:e},c),calendar:t})}static from(n,e){if(u(e),n instanceof PlainMonthDay)return Xt(n.getISOFields());if("object"==typeof n){const o=Po(n);let r=t(n,Vt);return void 0===r.year&&void 0===n.calendar&&(r={...r,year:1972}),o.monthDayFromFields(r,e)}const o=Wn(String(n));return void 0===o.calendar&&(o.isoYear=1972),Xt(he(o))}with(n,e){const t=function(n,e){const t={day:n.day??e.day};void 0!==n.monthCode?(t.monthCode=n.monthCode,void 0!==n.month&&(t.month=n.month)):void 0!==n.month?(t.month=n.month,t.year=n.year):t.monthCode=e.monthCode;return t}(a(n,Vt),this);return this.calendar.monthDayFromFields(t,e)}equals(n){return e=this,t=g(PlainMonthDay,n),e.calendar.id===t.calendar.id&&z(e.getISOFields())===z(t.getISOFields());var e,t}toString(n){const e=this.getISOFields(),t=e.calendar.id,o=gn(n);return("iso8601"===t?function(n){return sn(n.isoMonth,2)+"-"+sn(n.isoDay,2)}(e):St(e))+Tt(t,o)}toPlainDate(n,e){return this.calendar.dateFromFields({year:n.year,monthCode:this.monthCode,day:this.day},e)}};Nn(PlainMonthDay),Zn(PlainMonthDay,["monthCode","day"]),Re(PlainMonthDay,Ze({month:"numeric",day:"numeric"},{weekday:void 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r=to({isoYear:n,isoMonth:e,isoDay:t},c),i=g(Calendar,o);!function(n,e){const t=z(n);Ne(t+(t<0n?86399999999999n:0n)),Fo(t,e)}(r,i.id),super({...r,calendar:i})}static from(n,e){if(u(e),n instanceof PlainDate)return _t(n.getISOFields());if("object"==typeof n){const o=t(n,pn);return Po(n).dateFromFields(o,e)}return _t(he(zn(String(n))))}static compare(n,e){return oo(g(PlainDate,n),g(PlainDate,e))}with(n,e){const t=no(a(n,pn),this);return this.calendar.dateFromFields(t,e)}withCalendar(n){const e=this.getISOFields();return new PlainDate(e.isoYear,e.isoMonth,e.isoDay,n)}add(n,e){return this.calendar.dateAdd(this,n,e)}subtract(n,e){return this.calendar.dateAdd(this,g(Duration,n).negated(),e)}until(n,e){return io(this,g(PlainDate,n),j(e,6,6,6,9))}since(n,e){return io(this,g(PlainDate,n),j(e,6,6,6,9),!0)}equals(n){return 0===oo(this,g(PlainDate,n))}toString(n){const e=gn(n),t=this.getISOFields();return St(t)+Tt(t.calendar.id,e)}toZonedDateTime(n){return this.toPlainDateTime(n.plainTime).toZonedDateTime(n.timeZone)}toPlainDateTime(n){return ko({...this.getISOFields(),...ft(n).getISOFields()})}toPlainYearMonth(){return qe(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}};function so(n){return n instanceof PlainDate||n instanceof PlainDateTime||n instanceof ZonedDateTime||n instanceof PlainYearMonth||n instanceof PlainMonthDay}function ao(n,e,t){let o;if(n instanceof PlainDate)o=n;else if(so(n)){if(t&&n instanceof PlainMonthDay)throw new TypeError("PlainMonthDay not allowed");o=_t(n.getISOFields())}else o=PlainDate.from(n);return Ro(o.calendar,e),o}function co(n,e,t){if(so(n))return n.getISOFields();let{era:o,eraYear:r,year:i,month:s,monthCode:a,day:d}=n;const h=void 0!==r&&void 0!==o?dn(e.id,r,o):void 0;if(void 0===i){if(void 0===h)throw new TypeError("Must specify either a year or an era & eraYear");i=h}else if(void 0!==h&&h!==i)throw new RangeError("year and era/eraYear must match");if(void 0===d)throw new TypeError("Must specify day");const l=u(t);if(void 0!==a){const[n,t]=e.convertMonthCode(a,i);if(void 0!==s&&s!==n)throw new RangeError("Month doesnt match with monthCode");if(s=n,t){if(l===c)throw new RangeError("Month code out of range");d=e.daysInMonth(i,s)}}else if(void 0===s)throw new TypeError("Must specify either a month or monthCode");return[i,s,d]=eo(i,s,d,e,l),Q(e.epochMilliseconds(i,s,d))}function uo(n,e){if(so(n)){if(e&&n instanceof PlainMonthDay)throw new TypeError("PlainMonthDay not allowed");return n.getISOFields()}return PlainDate.from(n).getISOFields()}function ho(n,e){return _(n.epochMilliseconds(e,1,1),n.epochMilliseconds(e+1,1,1))}function lo(n,e,t,o){return _(n.epochMilliseconds(e,1,1),n.epochMilliseconds(e,t,o))+1}Nn(PlainDate),Zn(PlainDate,En),Re(PlainDate,Ze({year:"numeric",month:"numeric",day:"numeric",weekday:void 0},{hour:void 0,minute:void 0,second:void 0}));var fo={hebrew:6,chinese:0,dangi:0},mo=class extends un{constructor(n){const e=go(n);if(t=n,o=e.resolvedOptions().calendar,hn(t)!==hn(o))throw new RangeError("Invalid calendar: "+n);var t,o;super(n),this.format=e,this.yearCorrection=this.computeFieldsDumb(0).year-1970,this.monthCacheByYear={}}epochMilliseconds(n,e,t){return nn(this.queryMonthCache(n)[0][e-1],t-1)}daysInMonth(n,e){const t=this.queryMonthCache(n)[0],o=t[e-1];e>=t.length&&(n++,e=0);return _(o,this.queryMonthCache(n)[0][e])}monthsInYear(n){return this.queryMonthCache(n)[0].length}monthCode(n,e){const t=this.queryLeapMonthByYear(e);return!t||n<t?super.monthCode(n,e):super.monthCode(n-1,e)+(n===t?"L":"")}convertMonthCode(n,e){const t=this.queryLeapMonthByYear(e);let o=/L$/.test(n),r=parseInt(n.substr(1)),i=!1;if(o){const n=fo[this.id];if(void 0===n)throw new RangeError("Calendar system doesnt support leap months");if(n){if(r!==n-1)throw new RangeError("Invalid leap-month month code")}else if(r<=1||r>=12)throw new RangeError("Invalid leap-month month 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e+1}}queryMonthCache(n){const{monthCacheByYear:e}=this;return e[n]||(e[n]=this.buildMonthCache(n))}buildMonthCache(n){const e=[],t=[],o={};let r=G(this.guessISOYear(n));for(r=nn(r,400);;){const o=this.computeFieldsDumb(r);if(o.year<n)break;r=nn(r,1-o.day),o.year===n&&(e.unshift(r),t.unshift(o.month)),r=nn(r,-1)}for(let n=0;n<t.length;n++)o[t[n]]=n+1;return[e,t,o]}guessISOYear(n){return n-this.yearCorrection}};function go(n){return new we("en-US",{calendar:n,era:"short",year:"numeric",month:"short",day:"numeric",timeZone:"UTC"})}var yo=G(1868,9,8),po={gregory:mn,japanese:class extends mn{constructor(){super(...arguments),this.format=go("japanese")}computeFields(n){const e=super.computeFields(n);if(n>=yo){const t=ge(this.format,n);e.era=pe(t.era),e.eraYear=parseInt(t.relatedYear||t.year)}return e}},islamic:class extends mo{guessISOYear(n){return Math.ceil(32*n/33+622)}}},wo={iso8601:fn};function vo(n){const e=(n=String(n)).toLocaleLowerCase();return wo[e]||(wo[e]=new(po[hn(e)]||mo)(n))}var Mo=G(1582,10,15),Io=G(622,7,18),So={buddhist:Mo,japanese:Mo,roc:Mo,islamic:Io,"islamic-rgsa":Io,indian:0},bo={};function Fo(n,e){return Do(Number(n/S),e)}function Do(n,e){if(function(n,e){return function(n){let e=bo[n];if(void 0===e){const t=So[n];if(void 0===t)e=!1;else{let o=vo(n);o instanceof mo||(o=new mo(n));const r=t-864e5,i=o.computeFields(r);e=r!==o.epochMilliseconds(i.year,i.month,i.day)}bo[n]=e}return e}(e)&&n<So[e]}(n,e))throw new RangeError("Invalid timestamp for calendar")}function To(n,e,t,o){let r=0,i=0,s=0,a=0;switch(o){case 9:r=function(n,e,t){const[,o,r]=eo(e.year,n.month,n.day,t,0),i=ro(e,n),s=q(e.month,o)||q(e.day,r);return e.year-n.year-(s&&i&&s!==i?i:0)}(n,e,t),n=Gt(n,r,t,0);case 8:i=function(n,e,t){let o=0;const r=ro(e,n);if(r){let{year:i}=n;for(;i!==e.year;)o+=t.monthsInYear(i)*r,i+=r;const[,s,a]=eo(e.year,n.month,n.day,t,0);o+=e.month-s;const c=q(e.day,a);c&&r&&c!==r&&(o-=r)}return o}(n,e,t),n=Jt(n,i,t,0)}return a=_(t.epochMilliseconds(n.year,n.month,n.day),t.epochMilliseconds(e.year,e.month,e.day)),7===o&&(s=Math.trunc(a/7),a%=7),new Duration(r,i,s,a)}function Oo(n,e,t){const o=7+e-t;return-$(en(n,1,o)-e,7)+o-1}function No(n,e,t){const o=Oo(n,e,t),r=Oo(n+1,e,t);return(ho(fn,n)-o+r)/7}var[Yo,Eo]=d(),Calendar=class extends y{constructor(n){super(),"islamicc"===n&&(n="islamic-civil"),Eo(this,vo(n))}static from(n){if("object"==typeof n&&n)return function(n){return n.calendar}(n)?function(n){if("object"==typeof n&&n){if("string"==typeof n.id)return n;throw new RangeError("Invalid calendar")}return new Calendar(String(n))}(n.calendar):n;const e=Qn(String(n));return new Calendar(e?e.calendar||"iso8601":n)}get id(){return Yo(this).id}era(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).era}eraYear(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).eraYear}year(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).year}month(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).month}monthCode(n){const e=ao(n,this);return Yo(this).monthCode(e.month,e.year)}day(n){const e=uo(n);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).day}dayOfWeek(n){const e=uo(n,!0);return en(e.isoYear,e.isoMonth,e.isoDay)}dayOfYear(n){const e=ao(n,this,!0);return lo(Yo(this),e.year,e.month,e.day)}weekOfYear(n){const e=uo(n,!0);return function(n,e,t,o,r){const i=Oo(n,o,r),s=Math.floor((lo(fn,n,e,t)-i-1)/7)+1;if(s<1)return s+No(n-1,o,r);const a=No(n,o,r);return s>a?s-a:s}(e.isoYear,e.isoMonth,e.isoDay,1,4)}daysInWeek(n){return uo(n,!0),7}daysInMonth(n){const e=ao(n,this,!0);return Yo(this).daysInMonth(e.year,e.month)}daysInYear(n){const e=ao(n,this,!0);return ho(Yo(this),e.year)}monthsInYear(n){const e=ao(n,this,!0);return Yo(this).monthsInYear(e.year)}inLeapYear(n){return Yo(this).inLeapYear(this.year(n))}dateFromFields(n,e){const t=co(n,Yo(this),e);return new PlainDate(t.isoYear,t.isoMonth,t.isoDay,this)}yearMonthFromFields(n,e){const t=co({...n,day:1},Yo(this),e);return new PlainYearMonth(t.isoYear,t.isoMonth,this,t.isoDay)}monthDayFromFields(n,e){const t=Yo(this);let{era:o,eraYear:r,year:i,month:s,monthCode:a,day:c}=n;if(void 0===c)throw new TypeError("required property 'day' missing or undefined");if(void 0!==a?i=1972:void 0!==o&&void 0!==r&&(i=dn(t.id,r,o)),void 0===i){if(void 0===a)throw new TypeError("either year or monthCode required with month");i=t.guessYearForMonthDay(a,c)}const u=co({year:i,month:s,monthCode:a,day:c},t,e);return new PlainMonthDay(u.isoMonth,u.isoDay,this,t.normalizeISOYearForMonthDay(u.isoYear))}dateAdd(n,e,t){const o=Yo(this),r=Kt(g(PlainDate,n,t),g(Duration,e),o,u(t));return new PlainDate(r.isoYear,r.isoMonth,r.isoDay,this)}dateUntil(n,e,t){const r=Yo(this),i=g(PlainDate,n),s=g(PlainDate,e),a=k(o(t).largestUnit,6,6,9);return Ro(Uo(i,s),this),To(i,s,r,a)}toString(){return this.id}};function Zo(){return new Calendar("iso8601")}function Co(n,e,t,o){const r=G(e,t,o);return Do(r,n.id),n.computeFields(r)}function Po(n){return void 0===n.calendar?Zo():g(Calendar,n.calendar)}function Uo(n,e){const{calendar:t}=n;return Ro(t,e.calendar),t}function Bo(n,e){const t=n.calendar,o=e.calendar;if("iso8601"===t.id)return o;if("iso8601"===o.id)return t;if(t.id!==o.id)throw new RangeError("Non-ISO calendars incompatible");return t}function Ro(n,e){if(n.id!==e.id)throw new RangeError("Calendars must match")}var PlainDateTime=class extends M{constructor(n,e,t,o=0,r=0,i=0,s=0,a=0,u=0,d=Zo()){const h=qo({isoYear:n,isoMonth:e,isoDay:t,isoHour:o,isoMinute:r,isoSecond:i,isoMillisecond:s,isoMicrosecond:a,isoNanosecond:u},c),l=g(Calendar,d);Oe(h,l.id),super({...h,calendar:l})}static from(n,e){const o=u(e);return ko(n instanceof PlainDateTime?n.getISOFields():"object"==typeof n?xo(t(n,vn),e,o,Po(n)):he(zn(String(n))))}static compare(n,e){return Lo(g(PlainDateTime,n),g(PlainDateTime,e))}with(n,e){return ko(xo(jo(a(n,vn),this),e,u(e),this.calendar))}withPlainDate(n){const e=g(PlainDate,n);return ko({...this.getISOFields(),...e.getISOFields(),calendar:Bo(this,e)})}withPlainTime(n){return ko({...this.getISOFields(),...ft(n).getISOFields()})}withCalendar(n){return ko({...this.getISOFields(),calendar:g(Calendar,n)})}add(n,e){return Ho(this,g(Duration,n),e)}subtract(n,e){return Ho(this,g(Duration,n).negated(),e)}until(n,e){return $o(this,g(PlainDateTime,n),e)}since(n,e){return $o(this,g(PlainDateTime,n),e,!0)}round(n){return function(n,e){const t=x(e,void 0,0,6);return zo(n,it(t),t.roundingMode)}(this,n)}equals(n){return 0===Lo(this,g(PlainDateTime,n))}toString(n){const e=bn(n),t=gn(n),o=zo(this,e.roundingIncrement,e.roundingMode).getISOFields();return It(o,e)+Tt(o.calendar.id,t)}toZonedDateTime(n,e){const t=g(TimeZone,n),o=t.getInstantFor(this,e);return new ZonedDateTime(o.epochNanoseconds,t,this.calendar)}toPlainYearMonth(){return qe(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}toPlainDate(){return _t(this.getISOFields())}toPlainTime(){return at(this.getISOFields())}};function ko(n){return new PlainDateTime(n.isoYear,n.isoMonth,n.isoDay,n.isoHour,n.isoMinute,n.isoSecond,n.isoMillisecond,n.isoMicrosecond,n.isoNanosecond,n.calendar)}function xo(n,e,t,o){return{...o.dateFromFields(n,e).getISOFields(),...lt(n,t)}}function jo(n,e){return{...no(n,e),...ut(n,e)}}function qo(n,e){return{...to(n,e),...ct(n,e)}}function Lo(n,e){return q(z(n.getISOFields()),z(e.getISOFields()))||q(n.calendar.id,e.calendar.id)}function Ho(n,e,t){const{calendar:o}=n,r=Ht(e),i=$t(e);return ko({...J(z(o.dateAdd(_t(n.getISOFields()),r,t).getISOFields())+gt(n)+gt(i)),calendar:o})}function $o(n,e,t,o){const r=j(t,6,0,0,9);return tt(Qe(n,e,r.largestUnit),r,n,e,o)}function zo(n,e,t){const o=ot(n,e,t);return ko(st(n.getISOFields(),o))}function Ao(n,e){return q(n.epochNanoseconds,e.epochNanoseconds)}function Wo(n,e){if(xt(e)>=6)throw new RangeError("Duration 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Jn(jt(this.getISOFields(),e),e)+ne(this.calendar.toString(),t)}toZonedDateTime(n,e){const t=U(ht,n),o=t.getInstantFor(this,e);return new mo(o.epochNanoseconds,t,this.calendar)}toPlainYearMonth(){return co(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}toPlainDate(){return mr(this.getISOFields())}toPlainTime(){return to(this.getISOFields())}};function Zo(n){return new Eo(n.isoYear,n.isoMonth,n.isoDay,n.isoHour,n.isoMinute,n.isoSecond,n.isoMillisecond,n.isoMicrosecond,n.isoNanosecond,n.calendar)}function Co(n,e,t){const o=function(n,e,t){const{calendar:o}=n;return vn(yn(o.dateAdd(mr(n),G(e,_),t).getISOFields())+BigInt(on(n))+tn(e))}(n.getISOFields(),e,t);return Zo({...o,calendar:n.calendar})}function Uo(n,e,t,o){const r=E(o,6,0,0,9);return Do(yr(n,e,dr(n,e),t,r))}de(Eo,"PlainDateTime"),se(Eo,b),ue(Eo,ce),Qt(Eo,At({year:"numeric",month:"numeric",day:"numeric",weekday:void 0,hour:"numeric",minute:"2-digit",second:"2-digit"},{}));var Po=class extends x{constructor(n,e,t=sr(),o=gn){super({...Bn({isoYear:o,isoMonth:n,isoDay:e},1),calendar:t})}static from(n,e){if(h(e),n instanceof Po)return Ro(n.getISOFields());if("object"==typeof n)return wt(n,e);const t=function(n){const e=je(n)||ke(n);if(!e)throw Ge("monthDay",n);return e}(String(n));return void 0===t.calendar&&(t.isoYear=gn),Ro(Je(t))}with(n,e){return Ft(this,n,e)}equals(n){return!Zn(this,U(Po,n))}toString(n){const e=this.getISOFields(),t=e.calendar.toString(),o=An(n);return("iso8601"===t?function(n){return an(n.isoMonth,2)+"-"+an(n.isoDay,2)}(e):Qn(e))+ne(t,o)}toPlainDate(n){return this.calendar.dateFromFields({year:n.year,monthCode:this.monthCode,day:this.day},{overflow:"reject"})}};function Ro(n){return new Po(n.isoMonth,n.isoDay,n.calendar,n.isoYear)}function Bo(n){return n instanceof fr||n instanceof Eo||n instanceof mo||n instanceof ao||n instanceof Po}function ko(n,e,t){let o;if(n instanceof fr)o=n;else if(Bo(n)){if(t&&n instanceof Po)throw new TypeError("PlainMonthDay not 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t=this.queryLeapMonthByYear(e);return!t||n<t?super.monthCode(n,e):super.monthCode(n-1,e)+(n===t?"L":"")}convertMonthCode(n,e){const t=this.queryLeapMonthByYear(e);let o=/L$/.test(n),r=parseInt(n.substr(1)),i=!1;if(o){const n=Lo[this.id];if(void 0===n)throw new RangeError("Calendar system doesnt support leap months");if(n){if(r!==n-1)throw new RangeError("Invalid leap-month month code")}else if(r<=1||r>=12)throw new RangeError("Invalid leap-month month code")}return!o||t&&r===t-1||(i=!0,o=!1),(o||t&&r>=t)&&r++,[r,i]}inLeapYear(n){const e=qo(this,n);return e>qo(this,n-1)&&e>qo(this,n+1)}guessYearForMonthDay(n,e){let t=1970+this.yearCorrection;const o=t+100;for(;t<o;t++){const[o,r]=this.convertMonthCode(n,t);if(!r&&o<=this.monthsInYear(t)&&e<=this.daysInMonth(t,o))return t}throw new Error("Could not guess year")}normalizeISOYearForMonthDay(n){return n}computeFields(n){const e=this.computeFieldsDumb(n),t=this.queryMonthCache(e.year)[2];return{...e,month:t[e.month]}}computeFieldsDumb(n){const e=_e(this.format,n);let t,o,r=parseInt(e.relatedYear||e.year);var i;return e.era&&(i=this.id,void 0!==un[ln(i)])&&(t=et(e.era),o=r,r=hn(this.id,o,t,!0)),{era:t,eraYear:o,year:r,month:e.month,day:parseInt(e.day)}}queryLeapMonthByYear(n){const e=this.queryMonthCache(n),t=this.queryMonthCache(n-1),o=this.queryMonthCache(n+1);if(e[0].length>t[0].length&&e[0].length>o[0].length){const n=e[1],o=t[1];for(let e=0;e<o.length;e++)if(o[e]!==n[e])return e+1}}queryMonthCache(n){const{monthCacheByYear:e}=this;return e[n]||(e[n]=this.buildMonthCache(n))}buildMonthCache(n){const e=[],t=[],o={};let r=pn(this.guessISOYear(n),1,1);for(r=Yn(r,400);;){const o=this.computeFieldsDumb(r);if(o.year<n)break;r=Yn(r,1-o.day),o.year===n&&(e.unshift(r),t.unshift(o.month)),r=Yn(r,-1)}for(let n=0;n<t.length;n++)o[t[n]]=n+1;return[e,t,o]}guessISOYear(n){return n-this.yearCorrection}};function zo(n){return new tt("en-US",{calendar:n,era:"short",year:"numeric",month:"short",day:"numeric",timeZone:"UTC"})}var Ao=pn(1868,9,8),Wo={gregory:zn,japanese:class extends zn{constructor(){super(...arguments),this.format=zo("japanese")}computeFields(n){const e=super.computeFields(n);if(n>=Ao){const t=_e(this.format,n);e.era=et(t.era),e.eraYear=parseInt(t.relatedYear||t.year)}return e}},islamic:class extends $o{guessISOYear(n){return Math.ceil(32*n/33+622)}}},Ko={iso8601:mn};function Go(n){const e=(n=String(n)).toLocaleLowerCase();return Ko[e]||(Ko[e]=new(Wo[ln(e)]||$o)(n))}var Jo=pn(1582,10,15),Qo=pn(622,7,18),Vo={buddhist:Jo,japanese:Jo,roc:Jo,islamic:Qo,"islamic-rgsa":Qo,indian:0},Xo={};function _o(n,t){return nr(Number(n/e),t)}function nr(n,e){if(function(n,e){return function(n){let e=Xo[n];if(void 0===e){const t=Vo[n];if(void 0===t)e=!1;else{let o=Go(n);o instanceof $o||(o=new $o(n));const r=t-864e5,i=o.computeFields(r);e=r!==o.epochMilliseconds(i.year,i.month,i.day)}Xo[n]=e}return e}(e)&&n<Vo[e]}(n,e))throw new RangeError("Invalid timestamp for calendar")}function er(n,e,t){const o=7+e-t;return-A(bn(n,1,o)-e,7)+o-1}function tr(n,e,t){const o=er(n,e,t),r=er(n+1,e,t);return(qo(mn,n)-o+r)/7}var[or,rr]=v(),ir=class extends P{constructor(n){super(),"islamicc"===n&&(n="islamic-civil"),rr(this,Go(n))}static from(n){if("object"==typeof n&&n)return function(n){return n.calendar}(n)?function(n){if("object"==typeof n&&n){if("string"==typeof n.id)return n;throw new RangeError("Invalid calendar")}return new ir(String(n))}(n.calendar):n;const e=ke(String(n),!1,!0);return new ir(e?e.calendar||"iso8601":n)}get id(){return this.toString()}era(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).era}eraYear(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).eraYear}year(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).year}month(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).month}monthCode(n){const e=ko(n,this);return or(this).monthCode(e.month,e.year)}day(n){const e=jo(n);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).day}dayOfWeek(n){const e=jo(n,!0);return bn(e.isoYear,e.isoMonth,e.isoDay)}dayOfYear(n){const e=ko(n,this,!0);return Ho(or(this),e.year,e.month,e.day)}weekOfYear(n){const e=jo(n,!0);return function(n,e,t,o,r){const i=er(n,o,r),s=Math.floor((Ho(mn,n,e,t)-i-1)/7)+1;if(s<1)return s+tr(n-1,o,r);const a=tr(n,o,r);return s>a?s-a:s}(e.isoYear,e.isoMonth,e.isoDay,1,4)}daysInWeek(n){return jo(n,!0),7}daysInMonth(n){const e=ko(n,this,!0);return or(this).daysInMonth(e.year,e.month)}daysInYear(n){const e=ko(n,this,!0);return qo(or(this),e.year)}monthsInYear(n){const e=ko(n,this,!0);return or(this).monthsInYear(e.year)}inLeapYear(n){return or(this).inLeapYear(this.year(n))}dateFromFields(n,e){const t=xo(m(n,qn),or(this),e);return new fr(t.isoYear,t.isoMonth,t.isoDay,this)}yearMonthFromFields(n,e){const t=xo({...m(n,jn),day:1},or(this),e);return new ao(t.isoYear,t.isoMonth,this,t.isoDay)}monthDayFromFields(n,e){const t=or(this),o=m(n,Ln);let{era:r,eraYear:i,year:s,month:a,monthCode:c,day:u}=o;if(void 0===u)throw new TypeError("required property 'day' missing or undefined");if(void 0!==c?s=gn:void 0!==r&&void 0!==i&&(s=hn(t.id,i,r)),void 0===s){if(void 0===c)throw new TypeError("either year or monthCode required with month");s=t.guessYearForMonthDay(c,u)}const d=xo({year:s,month:a,monthCode:c,day:u},t,e);return new Po(d.isoMonth,d.isoDay,this,t.normalizeISOYearForMonthDay(d.isoYear))}dateAdd(n,e,t){const o=or(this),r=function(n,e,t,o){n=fe(n=le(n,e.years,t,o),e.months,t,o);let r=t.epochMilliseconds(n.year,n.month,n.day);const i=Math.trunc(Number(tn(e))/s);return r=Yn(r,7*e.weeks+e.days+i),Mn(r)}(U(fr,n,t),U(Oo,e),o,h(t));return new fr(r.isoYear,r.isoMonth,r.isoDay,this)}dateUntil(n,e,t){const o=or(this),r=U(fr,n),i=U(fr,e),s=Y(g(t).largestUnit,6,6,9);return lr(this,dr(r,i)),Do(function(n,e,t,o){let r=0,i=0,s=0,a=0;switch(o){case 9:r=function(n,e,t){const[,o,r]=Rn(e.year,n.month,n.day,t,0),i=Un(e,n),s=j(e.month,o)||j(e.day,r);return e.year-n.year-(s&&i&&s!==i?i:0)}(n,e,t),n=le(n,r,t,0);case 8:i=function(n,e,t){let o=0;const r=Un(e,n);if(r){let{year:i}=n;for(;i!==e.year;)o+=t.monthsInYear(i)*r,i+=r;const[,s,a]=Rn(e.year,n.month,n.day,t,0);o+=e.month-s;const c=j(e.day,a);c&&r&&c!==r&&(o-=r)}return o}(n,e,t),n=fe(n,i,t,0)}a=Dn(t.epochMilliseconds(n.year,n.month,n.day),t.epochMilliseconds(e.year,e.month,e.day)),7===o&&(s=Math.trunc(a/7),a%=7);return J({years:r,months:i,weeks:s,days:a,hours:0,minutes:0,seconds:0,milliseconds:0,microseconds:0,nanoseconds:0})}(r,i,o,s))}fields(n){return n.slice()}mergeFields(n,e){return ar(n,e)}toString(){return or(this).id}};function sr(){return new ir("iso8601")}function ar(n,e){const t={...n,...e};if(void 0!==n.year){delete t.era,delete t.eraYear,delete t.year;let o=!1;void 0===e.era&&void 0===e.eraYear||(t.era=e.era,t.eraYear=e.eraYear,o=!0),void 0!==e.year&&(t.year=e.year,o=!0),o||(t.year=n.year)}if(void 0!==n.monthCode){delete t.monthCode,delete t.month;let o=!1;void 0!==e.month&&(t.month=e.month,o=!0),void 0!==e.monthCode&&(t.monthCode=e.monthCode,o=!0),o||(t.monthCode=n.monthCode)}return void 0!==n.day&&(t.day=e.day??n.day),t}function cr(n,e,t,o){const r=pn(e,t,o);return nr(r,n.id),n.computeFields(r)}function ur(n){return void 0===n.calendar?sr():U(ir,n.calendar)}function dr(n,e){const{calendar:t}=n;return lr(t,e.calendar),t}function hr(n,e){const t=n.calendar,o=e.calendar;if("iso8601"===t.id)return o;if("iso8601"===o.id)return t;if(t.id!==o.id)throw new RangeError("Non-ISO calendars incompatible");return t}function lr(n,e){if(n.id!==e.id)throw new RangeError("Calendars must match")}de(ir,"Calendar");var fr=class extends x{constructor(n,e,t,o=sr()){const r=Bn({isoYear:n,isoMonth:e,isoDay:t},1),i=U(ir,o);!function(n,e){const t=yn(n);xt(t+(t<0n?86399999999999n:0n)),_o(t,e)}(r,i.id),super({...r,calendar:i})}static from(n,e){return h(e),n instanceof fr?mr(n.getISOFields()):"object"==typeof n?gt(n,e):mr(Je(Ce(String(n))))}static compare(n,e){return Zn(U(fr,n),U(fr,e))}with(n,e){return It(this,n,e)}withCalendar(n){const e=this.getISOFields();return new fr(e.isoYear,e.isoMonth,e.isoDay,n)}add(n,e){return this.calendar.dateAdd(this,n,e)}subtract(n,e){return this.calendar.dateAdd(this,U(Oo,n).negated(),e)}until(n,e){return gr(this,U(fr,n),!1,e)}since(n,e){return gr(this,U(fr,n),!0,e)}equals(n){return!Zn(this,U(fr,n))}toString(n){const e=An(n),t=this.getISOFields();return Qn(t)+ne(t.calendar.toString(),e)}toZonedDateTime(n){const e=function(n){let e,t;if("string"==typeof n)t=n;else{if("object"!=typeof n)throw new TypeError("Invalid options/timeZone argument");if(void 0!==n.id?t=n:(t=n.timeZone,e=n.plainTime),void 0===t)throw new TypeError("Invalid timeZone argument")}return{plainTime:e,timeZone:t}}(n),t=U(ht,e.timeZone),o=void 0===e.plainTime?void 0:U(eo,e.plainTime);return go({...this.getISOFields(),...o?o.getISOFields():X,timeZone:t})}toPlainDateTime(n){return Zo({...this.getISOFields(),...oo(n).getISOFields()})}toPlainYearMonth(){return co(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}};function mr(n){return new fr(n.isoYear,n.isoMonth,n.isoDay,n.calendar)}function gr(n,e,t,o){return Do(wr(n,e,dr(n,e),t,E(o,6,6,6,9)))}function yr(n,e,t,o,r){return bo(pr(n,e,t,r.largestUnit),n,e,t,o,r)}function wr(n,e,t,o,r){return bo(t.dateUntil(n,e,{largestUnit:N[r.largestUnit]}),n,e,t,o,r)}function pr(n,e,t,o){if(!d(o))return vr(n,e,o);const r=mr({...n.getISOFields(),calendar:t});let i,s,a,c,u,h=mr({...e.getISOFields(),calendar:t});do{s=t.dateUntil(r,h,{largestUnit:N[o]}),i=n.add(s),a=vr(i,e,5),c=s.sign,u=a.sign}while(c&&u&&c!==u&&(h=h.add({days:u})));return f=a,{sign:(l=s).sign||f.sign,years:l.years+f.years,months:l.months+f.months,weeks:l.weeks+f.weeks,days:l.days+f.days,hours:l.hours+f.hours,minutes:l.minutes+f.minutes,seconds:l.seconds+f.seconds,milliseconds:l.milliseconds+f.milliseconds,microseconds:l.microseconds+f.microseconds,nanoseconds:l.nanoseconds+f.nanoseconds};var l,f}function vr(n,e,t){return rn(In(e)-In(n),t)}de(fr,"PlainDate"),se(fr),ue(fr,ce),Qt(fr,At({year:"numeric",month:"numeric",day:"numeric",weekday:void 0},{hour:void 0,minute:void 0,second:void 0}));var[Mr,Ir]=v(),Sr=class extends R{constructor(n){if(super(),"number"==typeof n)throw new TypeError("Must supply bigint, not number");var e;n=BigInt(n),((e=n)<-8640000000000000000000n||e>8640000000000000000000n)&&On(),Ir(this,n)}static from(n){if(n instanceof Sr)return new Sr(n.epochNanoseconds);const e=Ze(String(n)),t=e.offsetNanoseconds;if(void 0===t)throw new RangeError("Must specify an offset");return new Sr(yn(kn(e,1))-BigInt(t))}static fromEpochSeconds(n){return new Sr(BigInt(n)*t)}static fromEpochMilliseconds(n){return new Sr(BigInt(n)*e)}static fromEpochMicroseconds(e){return new Sr(e*n)}static fromEpochNanoseconds(n){return new Sr(n)}static compare(n,e){return Pn(U(Sr,n),U(Sr,e))}get epochNanoseconds(){return Mr(this)}add(n){return new Sr(ge(this.epochNanoseconds,U(Oo,n)))}subtract(n){return new Sr(ge(this.epochNanoseconds,K(U(Oo,n))))}until(n,e){return Fr(this,U(Sr,n),e)}since(n,e){return Fr(U(Sr,n),this,e)}round(n){const e=Z(n,void 0,0,5,!0);return new Sr(Ht(this.epochNanoseconds,e))}equals(n){return!Pn(this,U(Sr,n))}toString(n){const e=g(n).timeZone;return this.toZonedDateTimeISO(e??"UTC").toString({...n,offset:void 0===e?"never":"auto",timeZoneName:"never"})+(void 0===e?"Z":"")}toZonedDateTimeISO(n){return new mo(this.epochNanoseconds,n)}toZonedDateTime(n){if(!w(n))throw new TypeError("Must specify options");if(void 0===n.calendar)throw new TypeError("Must specify a calendar");if(void 0===n.timeZone)throw new TypeError("Must specify a timeZone");return new mo(this.epochNanoseconds,n.timeZone,n.calendar)}};function Fr(n,e,t){const o=E(t,3,0,0,5);return Do(function(n,e,t){return rn(z(e-n,a[t.smallestUnit]*t.roundingIncrement,t.roundingFunc),t.largestUnit)}(n.epochNanoseconds,e.epochNanoseconds,o))}de(Sr,"Instant"),oe(Sr),Qt(Sr,$t({year:"numeric",month:"numeric",day:"numeric",weekday:void 0,hour:"numeric",minute:"2-digit",second:"2-digit"},{timeZoneName:void 0},{}));var br=Symbol(),Nr=Symbol(),Tr=Symbol(),Or=class extends tt{constructor(n,e){const t=ot(n),o=function(n){const e={};for(const t in n){let o=n[t];w(o)&&(o=o.toString()),e[t]=o}return e}(e||{});super(t,o),this[br]=t,this[Nr]=o,this[Tr]=new Map}format(n){const e=Dr(this,n);return e[0]===this?super.format(n):e[0].format(e[1])}formatToParts(n){return super.formatToParts.call(...Dr(this,n))}formatRange(n,e){return super.formatRange.call(...Yr(this,n,e))}formatRangeToParts(n,e){return super.formatRangeToParts.call(...Yr(this,n,e))}};function Dr(n,e){const t=Vt(e);if(t){const o=Er(n,t);return[o.buildFormat(e),o.buildEpochMilli(e)]}return[n,e]}function Yr(n,e,t){const o=Vt(e);if(o!==Vt(t))throw new TypeError("Mismatch of types");if(o){const r=Er(n,o);return[r.buildFormat(e,t),r.buildEpochMilli(e),r.buildEpochMilli(t)]}return[n,e,t]}function Er(n,e){const t=n[Tr];let o=t.get(e);return o||(o=function(n){const e={};return{buildFormat:function(t,o){const r=n.buildKey(t,o),i=r.join("|");return e[i]||(e[i]=n.buildFormat(...r))},buildEpochMilli:n.buildEpochMilli}}(e(n[br],n[Nr])),t.set(e,o)),o}var Zr={zonedDateTimeISO:function(n){return go(Ur("iso8601",n))},zonedDateTime:function(n,e){return go(Ur(n,e))},plainDateTimeISO:function(n){return Zo(Ur("iso8601",n))},plainDateTime:function(n,e){return Zo(Ur(n,e))},plainDateISO:function(n){return mr(Ur("iso8601",n))},plainDate:function(n,e){return mr(Ur(n,e))},plainTimeISO:function(n){return to(Ur("iso8601",n))},instant:function(){return new Sr(Pr())},timeZone:Cr};function Cr(){return new ht((new tt).resolvedOptions().timeZone)}function Ur(n,e=Cr()){const t=U(ht,e);return{...yo(Pr(),t)[0],timeZone:t,calendar:U(ir,n)}}function Pr(){return BigInt(Date.now())*e}de(Zr,"Now"),globalThis.Temporal||(globalThis.Temporal={PlainYearMonth:ao,PlainMonthDay:Po,PlainDate:fr,PlainTime:eo,PlainDateTime:Eo,ZonedDateTime:mo,Instant:Sr,Calendar:ir,TimeZone:ht,Duration:Oo,Now:Zr},globalThis.Date.prototype.toTemporalInstant=function(){return n=this,Sr.fromEpochMilliseconds(n.valueOf());var n},globalThis.Intl.DateTimeFormat=Or);
 //# sourceMappingURL=global.js.map

dist/impl.d.ts

@@ -13,2 +13,56 @@ declare abstract class AbstractObj {
 
+interface LocalYearFields {
+    year: number;
+}
+interface LocalYearMonthFields extends LocalYearFields {
+    month: number;
+}
+interface LocalDateFields extends LocalYearMonthFields {
+    day: number;
+}
+interface LocalTimeFields {
+    hour: number;
+    minute: number;
+    second: number;
+    millisecond: number;
+    microsecond: number;
+    nanosecond: number;
+}
+interface ISOYearFields {
+    isoYear: number;
+}
+interface ISOYearMonthFields extends ISOYearFields {
+    isoMonth: number;
+}
+interface ISODateFields extends ISOYearMonthFields {
+    isoDay: number;
+}
+interface ISOTimeFieldsMilli {
+    isoHour: number;
+    isoMinute: number;
+    isoSecond: number;
+    isoMillisecond: number;
+}
+interface ISOTimeFields extends ISOTimeFieldsMilli {
+    isoMicrosecond: number;
+    isoNanosecond: number;
+}
+interface DurationTimeFields {
+    hours: number;
+    minutes: number;
+    seconds: number;
+    milliseconds: number;
+    microseconds: number;
+    nanoseconds: number;
+}
+interface UnsignedDurationFields extends DurationTimeFields {
+    years: number;
+    months: number;
+    weeks: number;
+    days: number;
+}
+interface DurationFields extends UnsignedDurationFields {
+    sign: CompareResult;
+}
+
 declare class Duration extends AbstractNoValueObj {
@@ -41,4 +95,4 @@ constructor(years?: number, months?: number, weeks?: number, days?: number, hours?: number, minutes?: number, seconds?: number, milliseconds?: number, microseconds?: number, nanoseconds?: number);
     }): Duration;
-    round(options: DurationRoundingOptions): Duration;
-    total(options: DurationTotalOptions): number;
+    round(options: DurationRoundingOptions | Unit): Duration;
+    total(options: DurationTotalOptions | Unit): number;
     toString(options?: DurationToStringOptions): string;
@@ -48,9 +102,12 @@ toLocaleString(_locales?: LocalesArg, _options?: unknown): string;
 
-interface OverflowHandlingMap {
-    constrain: 0;
-    reject: 1;
+interface OffsetHandlingMap {
+    prefer: 0;
+    use: 1;
+    ignore: 2;
+    reject: 3;
 }
 
 declare class PlainMonthDay extends AbstractISOObj<DateISOFields> {
-    constructor(isoMonth: number, isoDay: number, calendar?: CalendarProtocol, referenceISOYear?: number);
+    constructor(isoMonth: number, isoDay: number, calendar?: Calendar, // TODO: change back to CalendarProtocol
+    referenceISOYear?: number);
     static from(arg: MonthDayArg, options?: OverflowOptions): PlainMonthDay;
@@ -62,3 +119,3 @@ with(fields: MonthDayOverrides, options?: OverflowOptions): PlainMonthDay;
         year: number;
-    }, options?: OverflowOptions): PlainDate;
+    }): PlainDate;
 }
@@ -71,2 +128,26 @@ interface PlainMonthDay extends MonthDayCalendarFields {
 
+declare class PlainTime extends AbstractISOObj<TimeISOFields> {
+    constructor(isoHour?: number, isoMinute?: number, isoSecond?: number, isoMillisecond?: number, isoMicrosecond?: number, isoNanosecond?: number);
+    static from(arg: TimeArg, options?: OverflowOptions): PlainTime;
+    static compare(a: TimeArg, b: TimeArg): CompareResult;
+    with(fields: TimeLike, options?: OverflowOptions): PlainTime;
+    add(durationArg: DurationArg): PlainTime;
+    subtract(durationArg: DurationArg): PlainTime;
+    until(other: TimeArg, options?: TimeDiffOptions): Duration;
+    since(other: TimeArg, options?: TimeDiffOptions): Duration;
+    round(options: TimeRoundingOptions | TimeUnit): PlainTime;
+    equals(other: TimeArg): boolean;
+    toString(options?: TimeToStringOptions): string;
+    toZonedDateTime(options: {
+        plainDate: DateArg;
+        timeZone: TimeZoneArg;
+    }): ZonedDateTime;
+    toPlainDateTime(dateArg: DateArg): PlainDateTime;
+}
+interface PlainTime extends LocalTimeFields {
+    calendar: Calendar;
+}
+interface PlainTime extends ToLocaleStringMethods {
+}
+
 declare class PlainYearMonth extends AbstractISOObj<DateISOFields> {
@@ -110,3 +191,3 @@ constructor(isoYear: number, isoMonth: number, calendarArg?: CalendarArg, referenceISODay?: number);
     since(other: ZonedDateTimeArg, options?: DiffOptions): Duration;
-    round(options?: DateTimeRoundingOptions): ZonedDateTime;
+    round(options?: DateTimeRoundingOptions | DayTimeUnit): ZonedDateTime;
     equals(other: ZonedDateTimeArg): boolean;
@@ -126,3 +207,3 @@ startOfDay(): ZonedDateTime;
 }
-interface ZonedDateTime extends TimeFields {
+interface ZonedDateTime extends LocalTimeFields {
 }
@@ -197,45 +278,2 @@ interface ZonedDateTime extends ComputedEpochFields {
 
-declare class PlainTime extends AbstractISOObj<TimeISOFields> {
-    constructor(isoHour?: number, isoMinute?: number, isoSecond?: number, isoMillisecond?: number, isoMicrosecond?: number, isoNanosecond?: number);
-    static from(arg: TimeArg, options?: OverflowOptions): PlainTime;
-    static compare(a: TimeArg, b: TimeArg): CompareResult;
-    with(fields: TimeLike, options?: OverflowOptions): PlainTime;
-    add(durationArg: DurationArg): PlainTime;
-    subtract(durationArg: DurationArg): PlainTime;
-    until(other: TimeArg, options?: TimeDiffOptions): Duration;
-    since(other: TimeArg, options?: TimeDiffOptions): Duration;
-    round(options: TimeRoundingOptions): PlainTime;
-    equals(other: TimeArg): boolean;
-    toString(options?: TimeToStringOptions): string;
-    toZonedDateTime(options: {
-        plainDate: DateArg;
-        timeZone: TimeZoneArg;
-    }): ZonedDateTime;
-    toPlainDateTime(dateArg: DateArg): PlainDateTime;
-}
-interface PlainTime extends TimeFields {
-    calendar: Calendar;
-}
-interface PlainTime extends ToLocaleStringMethods {
-}
-
-interface TimeISOMilli {
-    isoHour: number;
-    isoMinute: number;
-    isoSecond: number;
-    isoMillisecond: number;
-}
-interface TimeISOEssentials extends TimeISOMilli {
-    isoMicrosecond: number;
-    isoNanosecond: number;
-}
-interface TimeFields {
-    hour: number;
-    minute: number;
-    second: number;
-    millisecond: number;
-    microsecond: number;
-    nanosecond: number;
-}
-
 declare class PlainDateTime extends AbstractISOObj<DateTimeISOFields> {
@@ -253,3 +291,3 @@ constructor(isoYear: number, isoMonth: number, isoDay: number, isoHour?: number, isoMinute?: number, isoSecond?: number, isoMillisecond?: number, isoMicrosecond?: number, isoNanosecond?: number, calendarArg?: CalendarArg);
     since(other: DateTimeArg, options?: DiffOptions): Duration;
-    round(options: DateTimeRoundingOptions): PlainDateTime;
+    round(options: DateTimeRoundingOptions | DayTimeUnit): PlainDateTime;
     equals(other: DateTimeArg): boolean;
@@ -268,3 +306,3 @@ toString(options?: DateTimeToStringOptions): string;
 }
-interface PlainDateTime extends TimeFields {
+interface PlainDateTime extends LocalTimeFields {
 }
@@ -274,21 +312,2 @@ interface PlainDateTime extends ToLocaleStringMethods {
 
-declare type RoundingFunc = (n: number) => number;
-
-interface YearMonthFields {
-    era: string | undefined;
-    eraYear: number | undefined;
-    year: number;
-    month: number;
-    monthCode: string;
-}
-
-declare type DateISOEssentials = {
-    isoYear: number;
-    isoMonth: number;
-    isoDay: number;
-};
-declare type DateFields = YearMonthFields & {
-    day: number;
-};
-
 interface ComputedEpochFields {
@@ -337,3 +356,3 @@ epochMicroseconds: bigint;
         timeZone: TimeZoneArg;
-    }): ZonedDateTime;
+    } | TimeZoneArg): ZonedDateTime;
     toPlainDateTime(timeArg?: TimeArg): PlainDateTime;
@@ -367,4 +386,4 @@ toPlainYearMonth(): PlainYearMonth;
     inLeapYear(arg: PlainYearMonth | DateArg | PlainDateTime | ZonedDateTime): boolean;
-    dateFromFields(arg: DateLikeFields, options?: OverflowOptions): PlainDate;
-    yearMonthFromFields(arg: YearMonthLikeFields, options?: OverflowOptions): PlainYearMonth;
+    dateFromFields(fields: DateLikeFields, options?: OverflowOptions): PlainDate;
+    yearMonthFromFields(fields: YearMonthLikeFields, options?: OverflowOptions): PlainYearMonth;
     monthDayFromFields(fields: MonthDayLikeFields, options?: OverflowOptions): PlainMonthDay;
@@ -375,2 +394,4 @@ dateAdd(dateArg: DateArg, durationArg: DurationArg, options?: OverflowOptions): PlainDate;
     }): Duration;
+    fields(inFields: string[]): string[];
+    mergeFields(baseFields: any, additionalFields: any): any;
     toString(): string;
@@ -402,9 +423,9 @@ }
 
-interface OffsetHandlingMap {
-    prefer: 0;
-    use: 1;
-    ignore: 2;
-    reject: 3;
+interface OverflowHandlingMap {
+    constrain: 0;
+    reject: 1;
 }
 
+declare type RoundingFunc = (n: number) => number;
+
 interface RoundingModeMap {
@@ -427,21 +448,6 @@ halfExpand: RoundingFunc;
 
-interface DurationTimeFields {
-    hours: number;
-    minutes: number;
-    seconds: number;
-    milliseconds: number;
-    microseconds: number;
-    nanoseconds: number;
-}
-interface DurationFields extends DurationTimeFields {
-    years: number;
-    months: number;
-    weeks: number;
-    days: number;
-}
+declare type YearMonthUnitProper = keyof LocalYearMonthFields;
+declare type DateUnitProper = keyof LocalDateFields | 'week';
+declare type TimeUnitProper = keyof LocalTimeFields;
 
-declare type YearMonthUnitProper = keyof YearMonthFields;
-declare type DateUnitProper = keyof DateFields | 'week';
-declare type TimeUnitProper = keyof TimeFields;
-
 declare type CompareResult = -1 | 0 | 1;
@@ -454,3 +460,3 @@ declare type TimeUnit = TimeUnitProper | /** @deprecated */ 'hours' | /** @deprecated */ 'minutes' | /** @deprecated */ 'seconds' | /** @deprecated */ 'milliseconds' | /** @deprecated */ 'microseconds' | /** @deprecated */ 'nanoseconds';
 declare type RoundingMode = keyof RoundingModeMap;
-declare type RoundingOptions<UnitType extends Unit = Unit> = {
+declare type RoundingOptions<UnitType extends DayTimeUnit = DayTimeUnit> = {
     smallestUnit: UnitType;
@@ -460,4 +466,4 @@ roundingMode?: RoundingMode;
 };
+declare type DateTimeRoundingOptions = RoundingOptions;
 declare type TimeRoundingOptions = RoundingOptions<TimeUnit>;
-declare type DateTimeRoundingOptions = RoundingOptions<DayTimeUnit>;
 declare type DurationRoundingOptions = DiffOptions & {
@@ -502,9 +508,9 @@ relativeTo?: ZonedDateTimeArg | DateTimeArg;
 };
-declare type DateISOFields = DateISOEssentials & {
-    calendar: CalendarProtocol;
+declare type DateISOFields = ISODateFields & {
+    calendar: Calendar;
 };
-declare type TimeISOFields = TimeISOEssentials & {
-    calendar: CalendarProtocol;
+declare type TimeISOFields = ISOTimeFields & {
+    calendar: Calendar;
 };
-declare type DateTimeISOFields = DateISOFields & TimeISOEssentials;
+declare type DateTimeISOFields = DateISOFields & ISOTimeFields;
 declare type ZonedDateTimeISOFields = DateTimeISOFields & {
@@ -539,3 +545,3 @@ timeZone: TimeZone;
 };
-declare type DateTimeLikeFields = DateLikeFields & Partial<TimeFields>;
+declare type DateTimeLikeFields = DateLikeFields & Partial<LocalTimeFields>;
 declare type ZonedDateTimeLikeFields = DateTimeLikeFields & {
@@ -567,3 +573,3 @@ offset?: string;
 };
-declare type TimeLike = Partial<TimeFields>;
+declare type TimeLike = Partial<LocalTimeFields>;
 declare type DateTimeLike = DateLike & TimeLike;
@@ -676,11 +682,2 @@ declare type ZonedDateTimeLike = DateTimeLike & {
 
-declare function getZonedDateTimeISO(timeZoneArg?: TimeZoneArg): ZonedDateTime;
-declare function getZonedDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): ZonedDateTime;
-declare function getPlainDateTimeISO(timeZoneArg?: TimeZoneArg): PlainDateTime;
-declare function getPlainDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDateTime;
-declare function getPlainDateISO(timeZoneArg?: TimeZoneArg): PlainDate;
-declare function getPlainDate(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDate;
-declare function getPlainTimeISO(timeZoneArg?: TimeZoneArg): PlainTime;
-declare function getInstant(): Instant;
-declare function getTimeZone(): TimeZone;
 declare const Now: {
@@ -698,2 +695,13 @@ zonedDateTimeISO: typeof getZonedDateTimeISO;
 
+declare function getZonedDateTimeISO(timeZoneArg?: TimeZoneArg): ZonedDateTime;
+declare function getZonedDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): ZonedDateTime;
+declare function getPlainDateTimeISO(timeZoneArg?: TimeZoneArg): PlainDateTime;
+declare function getPlainDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDateTime;
+declare function getPlainDateISO(timeZoneArg: TimeZoneArg): PlainDate;
+declare function getPlainDate(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDate;
+declare function getPlainTimeISO(timeZoneArg: TimeZoneArg): PlainTime;
+declare function getInstant(): Instant;
+declare function getTimeZone(): TimeZone;
+
+
 export { Calendar, CalendarArg, CalendarDisplay, CalendarProtocol, CompareResult, DateArg, DateDiffOptions, DateISOFields, DateLike, DateLikeFields, DateOverrides, DateTemporalMethods, DateTimeArg, DateTimeFormatArg, DateTimeFormatRangePart, DateTimeISOFields, DateTimeLike, DateTimeLikeFields, DateTimeOverrides, DateTimeRoundingOptions, DateTimeToStringOptions, DateToStringOptions, DateUnit, DateWithTemporal, DayTimeUnit, DiffOptions, Disambiguation, Duration, DurationArg, DurationLike, DurationRoundingOptions, DurationToStringOptions, DurationToStringUnit, DurationTotalOptions, ExtendedDateTimeFormat, FractionalSecondDigits, Instant, InstantArg, InstantToStringOptions, LocalesArg, MonthDayArg, MonthDayLike, MonthDayLikeFields, MonthDayOverrides, Now, OffsetDisplay, OffsetHandling, OverflowHandling, OverflowOptions, PlainDate, PlainDateTime, PlainMonthDay, PlainTime, PlainYearMonth, RoundingMode, RoundingOptions, TimeArg, TimeDiffOptions, TimeISOFields, TimeLike, TimeRoundingOptions, TimeToStringOptions, TimeToStringUnit, TimeUnit, TimeZone, TimeZoneArg, TimeZoneDisplay, TimeZoneProtocol, Unit, YearMonthArg, YearMonthDiffOptions, YearMonthLike, YearMonthLikeFields, YearMonthOverrides, YearMonthUnit, ZonedDateTime, ZonedDateTimeArg, ZonedDateTimeISOFields, ZonedDateTimeLike, ZonedDateTimeLikeFields, ZonedDateTimeOptions, ZonedDateTimeOverrides, ZonedDateTimeToStringOptions, dateToTemporalInstant };

dist/impl.js

@@ -1,2 +0,2 @@
-function n(n,e,t){const r=function(n,e,t){return(o,r)=>{if(void 0===o){const e=r??t;if(void 0===e)throw new RangeError(`Must specify a ${n}`);return e}if(void 0===e[o])throw new RangeError(`Invalid ${n}: ${o}`);return e[o]}}(n,e,t);return(e,t)=>{const i=o(e);return r(i[n],t)}}function e(n,e,t,o){if(void 0===n)return e;if(!Number.isFinite(n))throw new RangeError("Number must be finite");n=Math.trunc(n);const r=Math.min(Math.max(n,e),t);if(r!==n&&o===c)throw new RangeError("Invalid overflowed value "+n);return r}function t(n,e){const t={};let o=0;for(const r in e)void 0!==n[r]&&(t[r]=e[r](n[r]),o++);if(!o)throw new TypeError("Invalid object, no keys");return t}function o(n){if(void 0===n)return{};if(!i(n))throw TypeError("options must be an object or undefined");return n}var r=/object|function/;function i(n){return null!==n&&r.test(typeof n)}var s=["calendar","timeZone"];function a(n,e){for(const e of s)if(void 0!==n[e])throw new TypeError(`Disallowed field ${e}`);return t(n,e)}var c=1,u=n("overflow",{constrain:0,reject:1},0);function d(){const n=new WeakMap;return[n.get.bind(n),n.set.bind(n)]}function h(n,e){Object.defineProperties(n.prototype,f(e,(n=>({get:n}))))}function f(n,e){const t={};for(const o in n)t[o]=e(n[o],o);return t}function l(n,e){const t={};return n.forEach(((n,o)=>{t[n]=e(n,o)})),t}var m=Symbol();function g(n,e,...t){return e instanceof n?e:n.from(e,...t)}var y=class{toJSON(){return this.toString()}},w=class extends y{valueOf(){throw new Error("Cannot convert object using valueOf")}},[p,v]=d(),M=class extends w{constructor(n){super(),v(this,Object.freeze(n))}getISOFields(){return p(this)}},I=1000n,S=1000000n,b=1000000000n,F=60000000000n,D=3600000000000n,O=86400000000000n,T=[1,1e3,1e6,1e9,6e10,36e11,864e11],N=[9,6,3];function Y(n){return n<=6}function E(n){return n>=6}var Z=n("roundingMode",{halfExpand:Math.round,ceil:Math.ceil,trunc:Math.trunc,floor:Math.floor}),C=["nanosecond","microsecond","millisecond","second","minute","hour"],U=[...C,"day","week","month","year"],P=U.map((n=>n+"s")),B=l(U,((n,e)=>e)),R=l(P,((n,e)=>e));function k(n,e,t,o){let r;if(void 0===n){if(void 0===e)throw new RangeError("Unit is required");r=e}else if(r=B[n]??R[n],void 0===r||r<t||r>o)throw new RangeError("Invalid unit "+n);return r}function x(n,e,t,r,s,a){if(void 0===e&&!i(n))throw new TypeError("Need rounding options");const c=o(n),u=c.roundingIncrement??1,d=k(c.smallestUnit,e,t,r);if(!s&&a){if(d<6&&864e11%u*T[d])throw new RangeError("Increment must evenly divide into 24 hours")}else{if(d<6?T[d+1]%u:!s&&1!==u)throw new RangeError("roundingIncrement does not divide evenly into next highest unit");if(d<6&&u*T[d]>=T[d+1])throw new RangeError("roundingIncrement must be less than next highest unit")}return{smallestUnit:d,roundingMode:Z(n,s?Math.trunc:Math.round),roundingIncrement:u}}function j(n,e,t,r,i,s,a){const c=x(n,t,r,i,!a,s);e=Math.max(e,c.smallestUnit);let u=o(n).largestUnit;"auto"===u&&(u=void 0);const d=k(u,e,r,i);if(c.smallestUnit>d)throw new RangeError("Bad smallestUnit/largestUnit");return{largestUnit:d,...c}}function q(n,e){return n<e?-1:n>e?1:0}function L(n){return q(n,0)}function H(n,e,t){const o=BigInt(e),r=n/o*o,i=Number(n-r);return r+BigInt(t(i/e))*o}function $(n,e){return(n%e+e)%e}function z(n){return K(n.isoYear,n.isoMonth,n.isoDay,n.isoHour,n.isoMinute,n.isoSecond,n.isoMillisecond,n.isoMicrosecond,n.isoNanosecond)}function A(n){return Math.floor(W(n)/1e3)}function W(n){return G(n.isoYear,n.isoMonth,n.isoDay,n.isoHour,n.isoMinute,n.isoSecond,n.isoMillisecond)}function K(n,e,t,o,r,i,s,a,c){return BigInt(G(n,e,t,o,r,i,s))*S+BigInt(a??0)*I+BigInt(c??0)}function G(n,e,t,o,r,i,s){const a=n??1970,c=e??1,u=t??1,d=L(a);let h,f,l=0;const m=a>=0&&a<1e3,g=m?a+1200:a;for(;l<31;l++){h=u-d*l;const n=Date.UTC(g,c-1,h,o??0,r??0,i??0,s??0);if(!on(n)){f=n+d*l*864e5;break}}return(void 0===f||h<1||h>ln.daysInMonth(a,c))&&rn(),m&&(f=new Date(f).setUTCFullYear(a)),f}function J(n){let e=n/S,t=Number(n-e*S);t<0&&(t+=1e6,e-=1n);const o=Math.floor(t/1e3);return t-=1e3*o,{...Q(Number(e)),isoMicrosecond:o,isoNanosecond:t}}function Q(n){const[e,t]=tn(n);return{isoYear:e.getUTCFullYear(),isoMonth:e.getUTCMonth()+1,isoDay:e.getUTCDate()+t,isoHour:e.getUTCHours(),isoMinute:e.getUTCMinutes(),isoSecond:e.getUTCSeconds(),isoMillisecond:e.getUTCMilliseconds()}}function V(n){return tn(1e3*n)[0].getUTCFullYear()}function X(n){return Math.floor(G(n)/1e3)}function _(n,e){return Math.round((e-n)/864e5)}function nn(n,e){return n+864e5*e}function en(n,e,t){const[o,r]=tn(G(n,e,t));return $(o.getUTCDay()+r,7)||7}function tn(n){const e=L(n);let t,o=0;for(;o<31;o++){const r=new Date(n-e*o*864e5);if(!on(r)){t=r;break}}return void 0===t&&rn(),[t,e*o]}function on(n){return isNaN(n.valueOf())}function rn(){throw new RangeError("Date outside of supported range")}function sn(n,e){return String(n).padStart(e,"0")}function an(n){return n<0?"-":"+"}var cn={gregory:{bce:-1,ce:0},ethioaa:{era0:0},ethiopic:{era0:0,era1:5500},coptic:{era0:-1,era1:0},roc:{beforeroc:-1,minguo:0},buddhist:{be:0},islamic:{ah:0},indian:{saka:0},persian:{ap:0},japanese:{bce:-1,ce:0,meiji:1867,taisho:1911,showa:1925,heisei:1988,reiwa:2018}},un=class{constructor(n){this.id=n}monthCode(n,e){return"M"+sn(n,2)}convertMonthCode(n,e){const t=/L$/.test(n),o=parseInt(n.substr(1));if(t)throw new RangeError("Calendar system doesnt support leap months");return[o,!1]}};function dn(n,e,t,o){let r=cn[hn(n)]?.[t];if(void 0===r){if(!o)throw new Error("Unkown era "+t);r=0}return(r+e)*(L(r)||1)}function hn(n){return n.split("-")[0]}var fn=class extends un{computeFields(n){const e=Q(n);return{era:void 0,eraYear:void 0,year:e.isoYear,month:e.isoMonth,day:e.isoDay}}epochMilliseconds(n,e,t){return G(n,e,t)}daysInMonth(n,e){return 2===e?this.inLeapYear(n)?29:28:4===e||6===e||9===e||11===e?30:31}monthsInYear(){return 12}inLeapYear(n){return n%4==0&&(n%100!=0||n%400==0)}guessYearForMonthDay(){return 1972}normalizeISOYearForMonthDay(){return 1972}},ln=new fn("iso8601"),mn=class extends fn{computeFields(n){const e=super.computeFields(n),{year:t}=e;return{...e,era:t<1?"bce":"ce",eraYear:t<1?-(t-1):t}}},gn=n("calendarName",{auto:0,never:1,always:2},0),yn={era:String,eraYear:Number,year:Number,month:Number,monthCode:String},wn={...yn,day:Number},pn={hour:Number,minute:Number,second:Number,millisecond:Number,microsecond:Number,nanosecond:Number},vn={...wn,...pn},Mn={...vn,offset:String},In=l(P,(()=>Number)),Sn=n("offset",{prefer:0,use:1,ignore:2,reject:3});function bn(n,t=4){const r=o(n),i=r.smallestUnit,s=r.fractionalSecondDigits;let a,u=0,d=1;return void 0!==i?(u=k(i,void 0,0,t),d=T[u],a=N[u]||0):void 0!==s&&"auto"!==s&&(a=e(s,0,9,c),d=Math.pow(10,9-a)),{smallestUnit:u,fractionalSecondDigits:a,roundingMode:Z(n,Math.trunc),roundingIncrement:d}}var Fn=n("timeZoneName",{auto:0,never:1},0);function Dn(n){h(n,{epochMicroseconds(){return this.epochNanoseconds/I},epochMilliseconds(){return Number(this.epochNanoseconds/S)},epochSeconds(){return Number(this.epochNanoseconds/b)}})}var On,Tn={calendar:"calendar"};for(const n of U)Tn[n]="iso"+((On=n).charAt(0).toUpperCase()+On.slice(1));function Nn(n,e=[]){h(n,l(e.concat("calendar"),(n=>function(){return this.getISOFields()[Tn[n]]})))}var Yn=["era","eraYear","year","month","monthCode","daysInMonth","daysInYear","monthsInYear","inLeapYear"],En=[...Yn,"day","dayOfWeek","dayOfYear","weekOfYear","daysInWeek"];function Zn(n,e){h(n,l(e,(n=>function(){const e=this.calendar[n](this);return Object.defineProperty(this,n,{value:e}),e})))}var Cn="(\\d{2})(:?(\\d{2})(:?(\\d{2})([.,](\\d{1,9}))?)?)?",Un="([+-])"+Cn,Pn="(Z|"+Un+")?(\\[([^=\\]]+)\\])?(\\[u-ca=([^\\]]+)\\])?",Bn=Hn("([+-]\\d{6}|\\d{4})-?(\\d{2})"+Pn),Rn=Hn("(--)?(\\d{2})-?(\\d{2})"+Pn),kn=Hn("([+-]\\d{6}|\\d{4})-?(\\d{2})-?(\\d{2})([T ](\\d{2})(:?(\\d{2})(:?(\\d{2})([.,](\\d{1,9}))?)?)?)?"+Pn),xn=Hn(Cn+Pn),jn=Hn(Un),qn=/^([-+])?P(\d+Y)?(\d+M)?(\d+W)?(\d+D)?(T((\d+)([.,](\d{1,9}))?H)?((\d+)([.,](\d{1,9}))?M)?((\d+)([.,](\d{1,9}))?S)?)?$/i,Ln=/\u2212/g;function Hn(n){return new RegExp(`^${n}$`,"i")}function $n(n){const e=Jn(n);if(!e)throw se("dateTime",n);return e}function zn(n){const e=Qn(n);if(!e)throw se("dateTime",n);return e}function An(n){const e=function(n){const e=Bn.exec(ie(n));if(e)return{calendar:(t=e.slice(1))[14],isoYear:oe(t[0]),isoMonth:oe(t[1]),isoDay:1};var t}(n)||Qn(n);if(!e)throw se("yearMonth",n);return e}function Wn(n){const e=function(n){const e=Rn.exec(ie(n));if(e)return{calendar:(t=e.slice(1))[15],isoYear:1972,isoMonth:oe(t[1]),isoDay:oe(t[2])};var t}(n)||Qn(n);if(!e)throw se("monthDay",n);return e}function Kn(n){const e=Vn(n);if(void 0===e)throw se("timeZone",n);return e}function Gn(n){const e=function(n){const e=xn.exec(ie(n));if(e)return _n(e.slice(1))}(n)||Qn(n);if(void 0===e)throw se("time",n);return e}function Jn(n){const e=kn.exec(ie(n));if(e)return function(n){const e=n[11];let t,o=!1;e&&(o="Z"===e.toUpperCase(),t=o?0:ne(n.slice(12)));return{...Xn(n),timeZone:n[21],offset:t,Z:o}}(e.slice(1))}function Qn(n){const e=kn.exec(ie(n));if(e)return Xn(e.slice(1))}function Vn(n){const e=jn.exec(ie(n));if(e)return ne(e.slice(1))}function Xn(n){return{calendar:n[23],isoYear:oe(n[0]),isoMonth:oe(n[1]),isoDay:oe(n[2]),..._n(n.slice(4))}}function _n(n){const e=te(n[4]);return{...wt(vt(BigInt(ee(n[6]||"")),2)),isoHour:te(n[0]),isoMinute:te(n[2]),isoSecond:60===e?59:e}}function ne(n){return("+"===n[0]?1:-1)*function(n){return 36e11*te(n[0])+6e10*te(n[2])+1e9*te(n[4])+ee(n[6]||"")}(n.slice(1))}function ee(n){return parseInt(n.padEnd(9,"0"))}function te(n){return parseInt(n||"0")}function oe(n){return parseInt(n||"1")}function re(n){return void 0===n?void 0:parseInt(n)}function ie(n){return n.replace(Ln,"-")}function se(n,e){throw new RangeError(`Cannot parse ${n} '${e}'`)}function ae(n,e,t,o){const r=P[e],{sign:i}=n,s={};for(let t=9;t>=e;t--){const e=P[t];s[e]=n[e]}const a={[r]:i},c=t.add(s),u=c.add(a),d=ce(c),h=ce(u),f=ce(o),l=Number(f-d)/Number(h-d)*i;return s[r]+=l,s}function ce(n){const{epochNanoseconds:e}=n;return void 0!==e?e:z(n.getISOFields())}var ue=n("disambiguation",{compatible:0,earlier:1,later:2,reject:3},0),de=n("offset",{auto:0,never:1},0);function he(n){return{...n,calendar:void 0===n.calendar?Zo():new Calendar(n.calendar)}}function fe(n){return{...he(n),timeZone:new TimeZone(n.timeZone)}}var le=class{constructor(n){this.id=n}},me=class extends le{constructor(n,e){super(n),this.offsetSecs=e}getPossibleOffsets(){return[this.offsetSecs]}getOffset(){return this.offsetSecs}getTransition(){}};function ge(n,e){const t={},o=n.formatToParts(e);for(const n of o)t[n.type]=n.value;return t}var ye={bc:"bce",ad:"ce"};function we(n){return n=n.toLowerCase().normalize("NFD").replace(/[^a-z0-9]/g,""),ye[n]||n}var pe=Intl.DateTimeFormat;function ve(n){return[].concat(n||[])}var Me={"Pacific/Apia":{2011:[[1301752800,-36e3,-39600],[1316872800,-39600,-36e3],[1325239200,-36e3,50400]]}},Ie=[182,91,273],Se=class extends le{constructor(n){const e=new pe("en-GB",{era:"short",year:"numeric",month:"numeric",day:"numeric",hour:"numeric",minute:"numeric",second:"numeric",timeZone:n});super(e.resolvedOptions().timeZone),this.format=e,this.yearEndOffsets={},this.transitionsInYear=Me[n]||{}}getPossibleOffsets(n){const e=[this.getTransition(n,-1),this.getTransition(n-1,1)].filter(Boolean);let t;for(const o of e){const[e,r,i]=o,s=n-r,a=n-i;if(e>s&&e>a)return[r];if(!(e<=s&&e<=a))return[r,i];t=i}return void 0!==t?[t]:[this.getYearEndOffset(V(n))]}getOffset(n){const e=ge(this.format,1e3*n);let t=parseInt(e.year);"bce"===we(e.era)&&(t=-(t-1));const o=G(t,parseInt(e.month),parseInt(e.day),parseInt(e.hour),parseInt(e.minute),parseInt(e.second));return Math.floor(o/1e3)-n}getTransition(n,e){const t=V(n);for(let o=0;o<100;o++){const r=t+o*e,i=this.getTransitionsInYear(r),s=i.length,a=e<0?s-1:0;for(let t=0;t<s;t++){const o=i[a+t*e];if(q(o[0],n)===e)return o}}}getYearEndOffset(n){const{yearEndOffsets:e}=this;return e[n]||(e[n]=this.getOffset(X(n+1)-1))}getTransitionsInYear(n){const{transitionsInYear:e}=this;return e[n]||(e[n]=this.computeTransitionsInYear(n))}computeTransitionsInYear(n){const e=this.getYearEndOffset(n-1),t=this.getYearEndOffset(n),o=X(n)-1,r=X(n+1)-1;if(e!==t)return[this.searchTransition(o,r,e,t)];const i=this.searchIsland(e,o);return void 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We(n,3),n.timeZone}if(e.Z)return new TimeZone("UTC");if(void 0!==e.offset)return new TimeZone(Dt(e.offset))}return new TimeZone(n)}get id(){return Fe(this).id}getOffsetStringFor(n){return Dt(this.getOffsetNanosecondsFor(n))}getOffsetNanosecondsFor(n){const e=g(Instant,n);return 1e9*Fe(this).getOffset(e.epochSeconds)}getPlainDateTimeFor(n,e=Zo()){const t=g(Instant,n);return ko({...J(t.epochNanoseconds+BigInt(this.getOffsetNanosecondsFor(t))),calendar:g(Calendar,e)})}getInstantFor(n,e){const t=ue(e),o=g(PlainDateTime,n).getISOFields(),r=A(o),i=Fe(this).getPossibleOffsets(r);let s;if(1===i.length||0===t)s=i[0];else{if(3===t)throw new RangeError("Ambiguous offset");s=Math[1===t?"max":"min"](...i)}return Oe(r-s,o)}getPossibleInstantsFor(n){const e=g(PlainDateTime,n).getISOFields(),t=A(e);let o=Fe(this).getPossibleOffsets(t);return 2===o.length&&o[0]<o[1]&&(o=[]),o.map((n=>Oe(t-n,e)))}getPreviousTransition(n){const e=g(Instant,n),t=Fe(this).getTransition(e.epochSeconds,-1);return 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Kt(n,e,t,o){n=Jt(n=Gt(n,e.years,t,o),e.months,t,o);let r=t.epochMilliseconds(n.year,n.month,n.day);const[,i]=function(n){const e=gt($t(n)),t=e/O;return[vt(e-t*O,5),new Duration(n.years,n.months,n.weeks,n.days+Number(t))]}(e);return r=nn(r,7*i.weeks+i.days),Q(r)}function Gt({year:n,month:t,day:o},r,i,s){n+=r;const a=e(t,1,i.monthsInYear(n),s);let c=t===a?o:1;return c=e(c,1,i.daysInMonth(n,a),s),{year:n,month:a,day:c}}function Jt({year:n,month:t,day:o},r,i,s){if(r){if(t+=r,r<0)for(;t<1;)t+=i.monthsInYear(--n);else{let e;for(;t>(e=i.monthsInYear(n));)t-=e,n++}o=e(o,1,i.daysInMonth(n,t),s)}return{year:n,month:t,day:o}}function Qt(n,e){return e?{...Q(nn(W(n),e)),calendar:n.calendar}:n}var PlainMonthDay=class extends M{constructor(n,e,t=Zo(),o){super({...to({isoYear:o??("iso8601"===t.id?1972:function(n,e){throw new n(e)}(Error,"Must specify referenceYear")),isoMonth:n,isoDay:e},c),calendar:t})}static from(n,e){if(u(e),n instanceof PlainMonthDay)return Xt(n.getISOFields());if("object"==typeof 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e=go(n);if(t=n,o=e.resolvedOptions().calendar,hn(t)!==hn(o))throw new RangeError("Invalid calendar: "+n);var t,o;super(n),this.format=e,this.yearCorrection=this.computeFieldsDumb(0).year-1970,this.monthCacheByYear={}}epochMilliseconds(n,e,t){return nn(this.queryMonthCache(n)[0][e-1],t-1)}daysInMonth(n,e){const t=this.queryMonthCache(n)[0],o=t[e-1];e>=t.length&&(n++,e=0);return _(o,this.queryMonthCache(n)[0][e])}monthsInYear(n){return this.queryMonthCache(n)[0].length}monthCode(n,e){const t=this.queryLeapMonthByYear(e);return!t||n<t?super.monthCode(n,e):super.monthCode(n-1,e)+(n===t?"L":"")}convertMonthCode(n,e){const t=this.queryLeapMonthByYear(e);let o=/L$/.test(n),r=parseInt(n.substr(1)),i=!1;if(o){const n=lo[this.id];if(void 0===n)throw new RangeError("Calendar system doesnt support leap months");if(n){if(r!==n-1)throw new RangeError("Invalid leap-month month code")}else if(r<=1||r>=12)throw new RangeError("Invalid leap-month month 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e+1}}queryMonthCache(n){const{monthCacheByYear:e}=this;return e[n]||(e[n]=this.buildMonthCache(n))}buildMonthCache(n){const e=[],t=[],o={};let r=G(this.guessISOYear(n));for(r=nn(r,400);;){const o=this.computeFieldsDumb(r);if(o.year<n)break;r=nn(r,1-o.day),o.year===n&&(e.unshift(r),t.unshift(o.month)),r=nn(r,-1)}for(let n=0;n<t.length;n++)o[t[n]]=n+1;return[e,t,o]}guessISOYear(n){return n-this.yearCorrection}};function go(n){return new pe("en-US",{calendar:n,era:"short",year:"numeric",month:"short",day:"numeric",timeZone:"UTC"})}var yo=G(1868,9,8),wo={gregory:mn,japanese:class extends mn{constructor(){super(...arguments),this.format=go("japanese")}computeFields(n){const e=super.computeFields(n);if(n>=yo){const t=ge(this.format,n);e.era=we(t.era),e.eraYear=parseInt(t.relatedYear||t.year)}return e}},islamic:class extends mo{guessISOYear(n){return Math.ceil(32*n/33+622)}}},po={iso8601:ln};function vo(n){const e=(n=String(n)).toLocaleLowerCase();return po[e]||(po[e]=new(wo[hn(e)]||mo)(n))}var Mo=G(1582,10,15),Io=G(622,7,18),So={buddhist:Mo,japanese:Mo,roc:Mo,islamic:Io,"islamic-rgsa":Io,indian:0},bo={};function Fo(n,e){return Do(Number(n/S),e)}function Do(n,e){if(function(n,e){return function(n){let e=bo[n];if(void 0===e){const t=So[n];if(void 0===t)e=!1;else{let o=vo(n);o instanceof mo||(o=new mo(n));const r=t-864e5,i=o.computeFields(r);e=r!==o.epochMilliseconds(i.year,i.month,i.day)}bo[n]=e}return e}(e)&&n<So[e]}(n,e))throw new RangeError("Invalid timestamp for calendar")}function Oo(n,e,t,o){let r=0,i=0,s=0,a=0;switch(o){case 9:r=function(n,e,t){const[,o,r]=eo(e.year,n.month,n.day,t,0),i=ro(e,n),s=q(e.month,o)||q(e.day,r);return e.year-n.year-(s&&i&&s!==i?i:0)}(n,e,t),n=Gt(n,r,t,0);case 8:i=function(n,e,t){let o=0;const r=ro(e,n);if(r){let{year:i}=n;for(;i!==e.year;)o+=t.monthsInYear(i)*r,i+=r;const[,s,a]=eo(e.year,n.month,n.day,t,0);o+=e.month-s;const c=q(e.day,a);c&&r&&c!==r&&(o-=r)}return o}(n,e,t),n=Jt(n,i,t,0)}return a=_(t.epochMilliseconds(n.year,n.month,n.day),t.epochMilliseconds(e.year,e.month,e.day)),7===o&&(s=Math.trunc(a/7),a%=7),new Duration(r,i,s,a)}function To(n,e,t){const o=7+e-t;return-$(en(n,1,o)-e,7)+o-1}function No(n,e,t){const o=To(n,e,t),r=To(n+1,e,t);return(ho(ln,n)-o+r)/7}var[Yo,Eo]=d(),Calendar=class extends y{constructor(n){super(),"islamicc"===n&&(n="islamic-civil"),Eo(this,vo(n))}static from(n){if("object"==typeof n&&n)return function(n){return n.calendar}(n)?function(n){if("object"==typeof n&&n){if("string"==typeof n.id)return n;throw new RangeError("Invalid calendar")}return new Calendar(String(n))}(n.calendar):n;const e=Qn(String(n));return new Calendar(e?e.calendar||"iso8601":n)}get id(){return Yo(this).id}era(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).era}eraYear(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).eraYear}year(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).year}month(n){const e=uo(n,!0);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).month}monthCode(n){const e=ao(n,this);return Yo(this).monthCode(e.month,e.year)}day(n){const e=uo(n);return Co(Yo(this),e.isoYear,e.isoMonth,e.isoDay).day}dayOfWeek(n){const e=uo(n,!0);return en(e.isoYear,e.isoMonth,e.isoDay)}dayOfYear(n){const e=ao(n,this,!0);return fo(Yo(this),e.year,e.month,e.day)}weekOfYear(n){const e=uo(n,!0);return function(n,e,t,o,r){const i=To(n,o,r),s=Math.floor((fo(ln,n,e,t)-i-1)/7)+1;if(s<1)return s+No(n-1,o,r);const a=No(n,o,r);return s>a?s-a:s}(e.isoYear,e.isoMonth,e.isoDay,1,4)}daysInWeek(n){return uo(n,!0),7}daysInMonth(n){const e=ao(n,this,!0);return Yo(this).daysInMonth(e.year,e.month)}daysInYear(n){const e=ao(n,this,!0);return ho(Yo(this),e.year)}monthsInYear(n){const e=ao(n,this,!0);return Yo(this).monthsInYear(e.year)}inLeapYear(n){return Yo(this).inLeapYear(this.year(n))}dateFromFields(n,e){const t=co(n,Yo(this),e);return new PlainDate(t.isoYear,t.isoMonth,t.isoDay,this)}yearMonthFromFields(n,e){const t=co({...n,day:1},Yo(this),e);return new PlainYearMonth(t.isoYear,t.isoMonth,this,t.isoDay)}monthDayFromFields(n,e){const t=Yo(this);let{era:o,eraYear:r,year:i,month:s,monthCode:a,day:c}=n;if(void 0===c)throw new TypeError("required property 'day' missing or undefined");if(void 0!==a?i=1972:void 0!==o&&void 0!==r&&(i=dn(t.id,r,o)),void 0===i){if(void 0===a)throw new TypeError("either year or monthCode required with month");i=t.guessYearForMonthDay(a,c)}const u=co({year:i,month:s,monthCode:a,day:c},t,e);return new PlainMonthDay(u.isoMonth,u.isoDay,this,t.normalizeISOYearForMonthDay(u.isoYear))}dateAdd(n,e,t){const o=Yo(this),r=Kt(g(PlainDate,n,t),g(Duration,e),o,u(t));return new PlainDate(r.isoYear,r.isoMonth,r.isoDay,this)}dateUntil(n,e,t){const r=Yo(this),i=g(PlainDate,n),s=g(PlainDate,e),a=k(o(t).largestUnit,6,6,9);return Ro(Po(i,s),this),Oo(i,s,r,a)}toString(){return this.id}};function Zo(){return new Calendar("iso8601")}function Co(n,e,t,o){const r=G(e,t,o);return Do(r,n.id),n.computeFields(r)}function Uo(n){return void 0===n.calendar?Zo():g(Calendar,n.calendar)}function Po(n,e){const{calendar:t}=n;return Ro(t,e.calendar),t}function Bo(n,e){const t=n.calendar,o=e.calendar;if("iso8601"===t.id)return o;if("iso8601"===o.id)return t;if(t.id!==o.id)throw new RangeError("Non-ISO calendars incompatible");return t}function Ro(n,e){if(n.id!==e.id)throw new RangeError("Calendars must match")}var PlainDateTime=class extends M{constructor(n,e,t,o=0,r=0,i=0,s=0,a=0,u=0,d=Zo()){const h=qo({isoYear:n,isoMonth:e,isoDay:t,isoHour:o,isoMinute:r,isoSecond:i,isoMillisecond:s,isoMicrosecond:a,isoNanosecond:u},c),f=g(Calendar,d);Te(h,f.id),super({...h,calendar:f})}static from(n,e){const o=u(e);return ko(n instanceof PlainDateTime?n.getISOFields():"object"==typeof n?xo(t(n,vn),e,o,Uo(n)):he(zn(String(n))))}static compare(n,e){return Lo(g(PlainDateTime,n),g(PlainDateTime,e))}with(n,e){return ko(xo(jo(a(n,vn),this),e,u(e),this.calendar))}withPlainDate(n){const e=g(PlainDate,n);return ko({...this.getISOFields(),...e.getISOFields(),calendar:Bo(this,e)})}withPlainTime(n){return ko({...this.getISOFields(),...lt(n).getISOFields()})}withCalendar(n){return ko({...this.getISOFields(),calendar:g(Calendar,n)})}add(n,e){return Ho(this,g(Duration,n),e)}subtract(n,e){return Ho(this,g(Duration,n).negated(),e)}until(n,e){return $o(this,g(PlainDateTime,n),e)}since(n,e){return $o(this,g(PlainDateTime,n),e,!0)}round(n){return function(n,e){const t=x(e,void 0,0,6);return zo(n,it(t),t.roundingMode)}(this,n)}equals(n){return 0===Lo(this,g(PlainDateTime,n))}toString(n){const e=bn(n),t=gn(n),o=zo(this,e.roundingIncrement,e.roundingMode).getISOFields();return It(o,e)+Ot(o.calendar.id,t)}toZonedDateTime(n,e){const t=g(TimeZone,n),o=t.getInstantFor(this,e);return new ZonedDateTime(o.epochNanoseconds,t,this.calendar)}toPlainYearMonth(){return qe(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}toPlainDate(){return _t(this.getISOFields())}toPlainTime(){return at(this.getISOFields())}};function ko(n){return new PlainDateTime(n.isoYear,n.isoMonth,n.isoDay,n.isoHour,n.isoMinute,n.isoSecond,n.isoMillisecond,n.isoMicrosecond,n.isoNanosecond,n.calendar)}function xo(n,e,t,o){return{...o.dateFromFields(n,e).getISOFields(),...ft(n,t)}}function jo(n,e){return{...no(n,e),...ut(n,e)}}function qo(n,e){return{...to(n,e),...ct(n,e)}}function Lo(n,e){return q(z(n.getISOFields()),z(e.getISOFields()))||q(n.calendar.id,e.calendar.id)}function Ho(n,e,t){const{calendar:o}=n,r=Ht(e),i=$t(e);return ko({...J(z(o.dateAdd(_t(n.getISOFields()),r,t).getISOFields())+gt(n)+gt(i)),calendar:o})}function $o(n,e,t,o){const r=j(t,6,0,0,9);return tt(Qe(n,e,r.largestUnit),r,n,e,o)}function zo(n,e,t){const o=ot(n,e,t);return ko(st(n.getISOFields(),o))}function Ao(n,e){return q(n.epochNanoseconds,e.epochNanoseconds)}function Wo(n,e){if(xt(e)>=6)throw new RangeError("Duration 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compare(n,e){return Ao(g(Instant,n),g(Instant,e))}get epochNanoseconds(){return Go(this)}add(n){return Wo(this,g(Duration,n))}subtract(n){return Wo(this,g(Duration,n).negated())}until(n,e){return Ko(this,g(Instant,n),e)}since(n,e){return Ko(g(Instant,n),this,e)}round(n){return function(n,e){const t=x(e,void 0,0,5,!1,!0),[o,r]=Mt(n.epochNanoseconds);return new Instant(o+rt(r,t))}(this,n)}equals(n){return 0===Ao(this,g(Instant,n))}toString(n){const e=o(n).timeZone;return this.toZonedDateTimeISO(e??"UTC").toString({...n,offset:void 0===e?"never":"auto",timeZoneName:"never"})+(void 0===e?"Z":"")}toZonedDateTimeISO(n){return new ZonedDateTime(this.epochNanoseconds,n)}toZonedDateTime(n){if(!i(n))throw new TypeError("Must specify options");if(void 0===n.calendar)throw new TypeError("Must specify a calendar");if(void 0===n.timeZone)throw new TypeError("Must specify a timeZone");return new ZonedDateTime(this.epochNanoseconds,n.timeZone,n.calendar)}};function Qo(n){return Instant.fromEpochMilliseconds(n.valueOf())}Dn(Instant),Re(Instant,Ye({year:"numeric",month:"numeric",day:"numeric",weekday:void 0,hour:"numeric",minute:"2-digit",second:"2-digit"},{timeZoneName:void 0},{}));var Vo=Symbol(),Xo=Symbol(),_o=Symbol(),nr=class extends pe{constructor(n,e){const t=ve(n),o=function(n){const e={};for(const t in n){let o=n[t];i(o)&&(o=o.toString()),e[t]=o}return e}(e||{});super(t,o),this[Vo]=t,this[Xo]=o,this[_o]=new Map}format(n){const e=er(this,n);return e[0]===this?super.format(n):e[0].format(e[1])}formatToParts(n){return super.formatToParts.call(...er(this,n))}formatRange(n,e){return super.formatRange.call(...tr(this,n,e))}formatRangeToParts(n,e){return super.formatRangeToParts.call(...tr(this,n,e))}};function er(n,e){const t=ke(e);if(t){const o=or(n,t);return[o.buildFormat(e),o.buildEpochMilli(e)]}return[n,e]}function tr(n,e,t){const o=ke(e);if(o!==ke(t))throw new TypeError("Mismatch of types");if(o){const r=or(n,o);return[r.buildFormat(e,t),r.buildEpochMilli(e),r.buildEpochMilli(t)]}return[n,e,t]}function or(n,e){const t=n[_o];let o=t.get(e);return o||(o=function(n){const e={};return{buildFormat:function(t,o){const r=n.buildKey(t,o),i=r.join("|");return e[i]||(e[i]=n.buildFormat(...r))},buildEpochMilli:n.buildEpochMilli}}(e(n[Vo],n[Xo])),t.set(e,o)),o}function rr(n=ur()){return cr().toZonedDateTimeISO(n)}function ir(n,e){if(void 0===n)throw new RangeError("Must specify calendar");return cr().toZonedDateTime({calendar:n,timeZone:e??ur()})}function sr(n=ur()){return rr(n).toPlainDateTime()}function ar(n,e){return ir(n,e).toPlainDateTime()}function cr(){return new Instant(BigInt(Date.now())*S)}function ur(){return new TimeZone((new pe).resolvedOptions().timeZone)}var dr={zonedDateTimeISO:rr,zonedDateTime:ir,plainDateTimeISO:sr,plainDateTime:ar,plainDateISO:function(n=ur()){return sr(n).toPlainDate()},plainDate:function(n,e){return ar(n,e).toPlainDate()},plainTimeISO:function(n=ur()){return cr().toZonedDateTimeISO(n).toPlainTime()},instant:cr,timeZone:ur};export{Calendar,Duration,nr as ExtendedDateTimeFormat,Instant,dr as Now,PlainDate,PlainDateTime,PlainMonthDay,PlainTime,PlainYearMonth,TimeZone,ZonedDateTime,Qo as dateToTemporalInstant};
+var n=1000n,e=1000000n,t=1000000000n,o=60000000000n,r=3600000000000n,i=86400000000000n,s=864e11,a=[1,1e3,1e6,1e9,6e10,36e11,s],c=[9,6,3];function u(n){return n<=6}function d(n){return n>=6}var h=f("overflow",{constrain:0,reject:1},0);function f(n,e,t){const o=function(n,e,t){return(o,r)=>{if(void 0===o){const e=r??t;if(void 0===e)throw new RangeError(`Must specify a ${n}`);return e}if(void 0===e[o])throw new RangeError(`Invalid ${n}: ${o}`);return e[o]}}(n,e,t);return(e,t)=>{const r=g(e);return o(r[n],t)}}function l(n,e,t,o){if(void 0===n)return e;if(!Number.isFinite(n))throw new RangeError("Number must be finite");n=Math.trunc(n);const r=Math.min(Math.max(n,e),t);if(r!==n&&1===o)throw new RangeError("Invalid overflowed value "+n);return r}function m(n,e){const t={};for(const o in e)void 0!==n[o]&&(t[o]=e[o](n[o]));return t}function g(n){if(void 0===n)return{};if(!w(n))throw TypeError("options must be an object or undefined");return n}var y=/object|function/;function w(n){return 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f=Y(h,e=Math.max(e,u),o,r);if(u>f)throw new RangeError("Bad smallestUnit/largestUnit");if(u<6){const n=a[u+1],e=a[u]*c;if(n===e)throw new RangeError("Must not equal larger unit");if(n%e)throw new RangeError("Must divide into larger unit")}return{smallestUnit:u,largestUnit:f,roundingFunc:d,roundingIncrement:c}}function Z(n,e,t,o,r){const i="string"==typeof n?{smallestUnit:n}:n;if(void 0===e&&!w(i))throw new TypeError("Need rounding options");const c=g(i),u=c.roundingIncrement??1,d=Y(c.smallestUnit,e,t,o),h=p(c,Math.round),f=a[d]*u;if(6===d){if(1!==u)throw new RangeError("When smallestUnit is days, roundingIncrement must be 1")}else{const n=r?s:a[d+1];if(!r&&n===f)throw new RangeError("Must not equal larger unit");if(n%f)throw new RangeError("Must divide into larger unit")}return{smallestUnit:d,roundingFunc:h,incNano:f}}var C=Symbol();function U(n,e,...t){return e instanceof n?e:n.from(e,...t)}var R=class{toJSON(){return this.toString()}},P=class extends R{valueOf(){throw new 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J({years:0,months:0,weeks:0,days:u,hours:d,minutes:h,seconds:f,milliseconds:l,microseconds:m,nanoseconds:Number(s)})}function sn(n){const e=Math.floor(n/s);n-=e*s;const t=Math.floor(n/36e11);n-=36e11*t;const o=Math.floor(n/6e10);n-=6e10*o;const r=Math.floor(n/1e9);n-=1e9*r;const i=Math.floor(n/1e6);n-=1e6*i;const a=Math.floor(n/1e3);return[{isoHour:t,isoMinute:o,isoSecond:r,isoMillisecond:i,isoMicrosecond:a,isoNanosecond:n-=1e3*a},e]}function an(n,e){return String(n).padStart(e,"0")}function cn(n){return n<0?"-":"+"}var un={gregory:{bce:-1,ce:0},ethioaa:{era0:0},ethiopic:{era0:0,era1:5500},coptic:{era0:-1,era1:0},roc:{beforeroc:-1,minguo:0},buddhist:{be:0},islamic:{ah:0},indian:{saka:0},persian:{ap:0},japanese:{bce:-1,ce:0,meiji:1867,taisho:1911,showa:1925,heisei:1988,reiwa:2018}},dn=class{constructor(n){this.id=n}monthCode(n,e){return"M"+an(n,2)}convertMonthCode(n,e){const t=/L$/.test(n),o=parseInt(n.substr(1));if(t)throw new RangeError("Calendar system doesnt support leap 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n=Date.UTC(f,e-1,c,o??0,r??0,i??0,s??0);if(!On(n)){u=n+a*d*864e5;break}}return(void 0===u||c<1||c>mn.daysInMonth(n,e))&&Tn(),h&&(u=new Date(u).setUTCFullYear(n)),u}function vn(n){let t=n/e,o=Number(n-t*e);o<0&&(o+=1e6,t-=1n);const r=Math.floor(o/1e3);return o-=1e3*r,{...Mn(Number(t)),isoMicrosecond:r,isoNanosecond:o}}function Mn(n){const[e,t]=Nn(n);return{isoYear:e.getUTCFullYear(),isoMonth:e.getUTCMonth()+1,isoDay:e.getUTCDate()+t,isoHour:e.getUTCHours(),isoMinute:e.getUTCMinutes(),isoSecond:e.getUTCSeconds(),isoMillisecond:e.getUTCMilliseconds()}}function In(n){return n.epochNanoseconds??yn(n.getISOFields())}function Sn(n){return Math.floor(pn(n,1,1)/1e3)}function Fn(n){return Nn(Number(n/e))[0].getUTCFullYear()}function bn(n,e,t){const[o,r]=Nn(pn(n,e,t));return A(o.getUTCDay()+r,7)||7}function Nn(n){const e=q(n);let t,o=0;for(;o<31;o++){const r=new Date(n-e*o*864e5);if(!On(r)){t=r;break}}return void 0===t&&Tn(),[t,e*o]}function On(n){return isNaN(n.valueOf())}function Tn(){throw new RangeError("Date outside of supported range")}function Dn(n,e){return Math.round((e-n)/864e5)}function Yn(n,e){return n+864e5*e}function En(n,e){return function(n,e){return!Zn(n,e)&&n.calendar.id===e.calendar.id}(n,e)&&n.timeZone.id===e.timeZone.id}function Zn(n,e){return j(yn(n.getISOFields()),yn(e.getISOFields()))}function Cn(n,e){return j(on(n.getISOFields()),on(e.getISOFields()))}function Un(n,e){return j(n.year,e.year)||j(n.month,e.month)||j(n.day,e.day)}function Rn(n,e){return j(n.epochNanoseconds,e.epochNanoseconds)}function Pn(n,e,t,o,r){return[n=Number(n),e=l(e,1,o.monthsInYear(n),r),t=l(t,1,o.daysInMonth(n,e),r)]}function Bn(n,e){const[t,o,r]=Pn(n.isoYear,n.isoMonth,n.isoDay,mn,e);return{isoYear:t,isoMonth:o,isoDay:r}}function kn(n,e){return{...Bn(n,e),...xn(n,e)}}function xn({isoHour:n,isoMinute:e,isoSecond:t,isoMillisecond:o,isoMicrosecond:r,isoNanosecond:i},s){return{isoHour:n=l(n,0,23,s),isoMinute:e=l(e,0,59,s),isoSecond:t=l(t,0,59,s),isoMillisecond:o=l(o,0,999,s),isoMicrosecond:r=l(r,0,999,s),isoNanosecond:i=l(i,0,999,s)}}var jn={era:String,eraYear:Number,year:Number,month:Number,monthCode:String},qn={...jn,day:Number},Hn={hour:Number,minute:Number,second:Number,millisecond:Number,microsecond:Number,nanosecond:Number},Ln={era:String,eraYear:Number,year:Number,month:Number,monthCode:String,day:Number},$n=F(O,(()=>Number)),zn=class extends ln{computeFields(n){const e=super.computeFields(n),{year:t}=e;return{...e,era:t<1?"bce":"ce",eraYear:t<1?-(t-1):t}}},An=f("calendarName",{auto:0,never:1,always:2},0);function Wn(n,e=4){const t=g(n),o=t.smallestUnit,r=t.fractionalSecondDigits;let i,s=0,u=1;return void 0!==o?(s=Y(o,void 0,0,e),u=a[s],i=c[s]||0):void 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t=this.queryLeapMonthByYear(e);return!t||n<t?super.monthCode(n,e):super.monthCode(n-1,e)+(n===t?"L":"")}convertMonthCode(n,e){const t=this.queryLeapMonthByYear(e);let o=/L$/.test(n),r=parseInt(n.substr(1)),i=!1;if(o){const n=Lo[this.id];if(void 0===n)throw new RangeError("Calendar system doesnt support leap months");if(n){if(r!==n-1)throw new RangeError("Invalid leap-month month code")}else if(r<=1||r>=12)throw new RangeError("Invalid leap-month month code")}return!o||t&&r===t-1||(i=!0,o=!1),(o||t&&r>=t)&&r++,[r,i]}inLeapYear(n){const e=qo(this,n);return e>qo(this,n-1)&&e>qo(this,n+1)}guessYearForMonthDay(n,e){let t=1970+this.yearCorrection;const o=t+100;for(;t<o;t++){const[o,r]=this.convertMonthCode(n,t);if(!r&&o<=this.monthsInYear(t)&&e<=this.daysInMonth(t,o))return t}throw new Error("Could not guess year")}normalizeISOYearForMonthDay(n){return n}computeFields(n){const e=this.computeFieldsDumb(n),t=this.queryMonthCache(e.year)[2];return{...e,month:t[e.month]}}computeFieldsDumb(n){const e=_e(this.format,n);let t,o,r=parseInt(e.relatedYear||e.year);var i;return e.era&&(i=this.id,void 0!==un[fn(i)])&&(t=et(e.era),o=r,r=hn(this.id,o,t,!0)),{era:t,eraYear:o,year:r,month:e.month,day:parseInt(e.day)}}queryLeapMonthByYear(n){const e=this.queryMonthCache(n),t=this.queryMonthCache(n-1),o=this.queryMonthCache(n+1);if(e[0].length>t[0].length&&e[0].length>o[0].length){const n=e[1],o=t[1];for(let e=0;e<o.length;e++)if(o[e]!==n[e])return e+1}}queryMonthCache(n){const{monthCacheByYear:e}=this;return e[n]||(e[n]=this.buildMonthCache(n))}buildMonthCache(n){const e=[],t=[],o={};let r=pn(this.guessISOYear(n),1,1);for(r=Yn(r,400);;){const o=this.computeFieldsDumb(r);if(o.year<n)break;r=Yn(r,1-o.day),o.year===n&&(e.unshift(r),t.unshift(o.month)),r=Yn(r,-1)}for(let n=0;n<t.length;n++)o[t[n]]=n+1;return[e,t,o]}guessISOYear(n){return n-this.yearCorrection}};function zo(n){return new tt("en-US",{calendar:n,era:"short",year:"numeric",month:"short",day:"numeric",timeZone:"UTC"})}var Ao=pn(1868,9,8),Wo={gregory:zn,japanese:class extends zn{constructor(){super(...arguments),this.format=zo("japanese")}computeFields(n){const e=super.computeFields(n);if(n>=Ao){const t=_e(this.format,n);e.era=et(t.era),e.eraYear=parseInt(t.relatedYear||t.year)}return e}},islamic:class extends $o{guessISOYear(n){return Math.ceil(32*n/33+622)}}},Ko={iso8601:mn};function Go(n){const e=(n=String(n)).toLocaleLowerCase();return Ko[e]||(Ko[e]=new(Wo[fn(e)]||$o)(n))}var Jo=pn(1582,10,15),Qo=pn(622,7,18),Vo={buddhist:Jo,japanese:Jo,roc:Jo,islamic:Qo,"islamic-rgsa":Qo,indian:0},Xo={};function _o(n,t){return nr(Number(n/e),t)}function nr(n,e){if(function(n,e){return function(n){let e=Xo[n];if(void 0===e){const t=Vo[n];if(void 0===t)e=!1;else{let o=Go(n);o instanceof $o||(o=new $o(n));const r=t-864e5,i=o.computeFields(r);e=r!==o.epochMilliseconds(i.year,i.month,i.day)}Xo[n]=e}return e}(e)&&n<Vo[e]}(n,e))throw new RangeError("Invalid timestamp for calendar")}function er(n,e,t){const o=7+e-t;return-A(bn(n,1,o)-e,7)+o-1}function tr(n,e,t){const o=er(n,e,t),r=er(n+1,e,t);return(qo(mn,n)-o+r)/7}var[or,rr]=v(),ir=class extends R{constructor(n){super(),"islamicc"===n&&(n="islamic-civil"),rr(this,Go(n))}static from(n){if("object"==typeof n&&n)return function(n){return n.calendar}(n)?function(n){if("object"==typeof n&&n){if("string"==typeof n.id)return n;throw new RangeError("Invalid calendar")}return new ir(String(n))}(n.calendar):n;const e=ke(String(n),!1,!0);return new ir(e?e.calendar||"iso8601":n)}get id(){return this.toString()}era(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).era}eraYear(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).eraYear}year(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).year}month(n){const e=jo(n,!0);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).month}monthCode(n){const e=ko(n,this);return or(this).monthCode(e.month,e.year)}day(n){const e=jo(n);return cr(or(this),e.isoYear,e.isoMonth,e.isoDay).day}dayOfWeek(n){const e=jo(n,!0);return bn(e.isoYear,e.isoMonth,e.isoDay)}dayOfYear(n){const e=ko(n,this,!0);return Ho(or(this),e.year,e.month,e.day)}weekOfYear(n){const e=jo(n,!0);return function(n,e,t,o,r){const i=er(n,o,r),s=Math.floor((Ho(mn,n,e,t)-i-1)/7)+1;if(s<1)return s+tr(n-1,o,r);const a=tr(n,o,r);return s>a?s-a:s}(e.isoYear,e.isoMonth,e.isoDay,1,4)}daysInWeek(n){return jo(n,!0),7}daysInMonth(n){const e=ko(n,this,!0);return or(this).daysInMonth(e.year,e.month)}daysInYear(n){const e=ko(n,this,!0);return qo(or(this),e.year)}monthsInYear(n){const e=ko(n,this,!0);return or(this).monthsInYear(e.year)}inLeapYear(n){return or(this).inLeapYear(this.year(n))}dateFromFields(n,e){const t=xo(m(n,qn),or(this),e);return new lr(t.isoYear,t.isoMonth,t.isoDay,this)}yearMonthFromFields(n,e){const t=xo({...m(n,jn),day:1},or(this),e);return new ao(t.isoYear,t.isoMonth,this,t.isoDay)}monthDayFromFields(n,e){const t=or(this),o=m(n,Ln);let{era:r,eraYear:i,year:s,month:a,monthCode:c,day:u}=o;if(void 0===u)throw new TypeError("required property 'day' missing or undefined");if(void 0!==c?s=gn:void 0!==r&&void 0!==i&&(s=hn(t.id,i,r)),void 0===s){if(void 0===c)throw new TypeError("either year or monthCode required with month");s=t.guessYearForMonthDay(c,u)}const d=xo({year:s,month:a,monthCode:c,day:u},t,e);return new Ro(d.isoMonth,d.isoDay,this,t.normalizeISOYearForMonthDay(d.isoYear))}dateAdd(n,e,t){const o=or(this),r=function(n,e,t,o){n=le(n=fe(n,e.years,t,o),e.months,t,o);let r=t.epochMilliseconds(n.year,n.month,n.day);const i=Math.trunc(Number(tn(e))/s);return r=Yn(r,7*e.weeks+e.days+i),Mn(r)}(U(lr,n,t),U(To,e),o,h(t));return new lr(r.isoYear,r.isoMonth,r.isoDay,this)}dateUntil(n,e,t){const o=or(this),r=U(lr,n),i=U(lr,e),s=Y(g(t).largestUnit,6,6,9);return fr(this,dr(r,i)),Do(function(n,e,t,o){let r=0,i=0,s=0,a=0;switch(o){case 9:r=function(n,e,t){const[,o,r]=Pn(e.year,n.month,n.day,t,0),i=Un(e,n),s=j(e.month,o)||j(e.day,r);return e.year-n.year-(s&&i&&s!==i?i:0)}(n,e,t),n=fe(n,r,t,0);case 8:i=function(n,e,t){let o=0;const r=Un(e,n);if(r){let{year:i}=n;for(;i!==e.year;)o+=t.monthsInYear(i)*r,i+=r;const[,s,a]=Pn(e.year,n.month,n.day,t,0);o+=e.month-s;const c=j(e.day,a);c&&r&&c!==r&&(o-=r)}return o}(n,e,t),n=le(n,i,t,0)}a=Dn(t.epochMilliseconds(n.year,n.month,n.day),t.epochMilliseconds(e.year,e.month,e.day)),7===o&&(s=Math.trunc(a/7),a%=7);return J({years:r,months:i,weeks:s,days:a,hours:0,minutes:0,seconds:0,milliseconds:0,microseconds:0,nanoseconds:0})}(r,i,o,s))}fields(n){return n.slice()}mergeFields(n,e){return ar(n,e)}toString(){return or(this).id}};function sr(){return new ir("iso8601")}function ar(n,e){const t={...n,...e};if(void 0!==n.year){delete t.era,delete t.eraYear,delete t.year;let o=!1;void 0===e.era&&void 0===e.eraYear||(t.era=e.era,t.eraYear=e.eraYear,o=!0),void 0!==e.year&&(t.year=e.year,o=!0),o||(t.year=n.year)}if(void 0!==n.monthCode){delete t.monthCode,delete t.month;let o=!1;void 0!==e.month&&(t.month=e.month,o=!0),void 0!==e.monthCode&&(t.monthCode=e.monthCode,o=!0),o||(t.monthCode=n.monthCode)}return void 0!==n.day&&(t.day=e.day??n.day),t}function cr(n,e,t,o){const r=pn(e,t,o);return nr(r,n.id),n.computeFields(r)}function ur(n){return void 0===n.calendar?sr():U(ir,n.calendar)}function dr(n,e){const{calendar:t}=n;return fr(t,e.calendar),t}function hr(n,e){const t=n.calendar,o=e.calendar;if("iso8601"===t.id)return o;if("iso8601"===o.id)return t;if(t.id!==o.id)throw new RangeError("Non-ISO calendars incompatible");return t}function fr(n,e){if(n.id!==e.id)throw new RangeError("Calendars must match")}de(ir,"Calendar");var lr=class extends x{constructor(n,e,t,o=sr()){const r=Bn({isoYear:n,isoMonth:e,isoDay:t},1),i=U(ir,o);!function(n,e){const t=yn(n);xt(t+(t<0n?86399999999999n:0n)),_o(t,e)}(r,i.id),super({...r,calendar:i})}static from(n,e){return h(e),n instanceof lr?mr(n.getISOFields()):"object"==typeof n?gt(n,e):mr(Je(Ce(String(n))))}static compare(n,e){return Zn(U(lr,n),U(lr,e))}with(n,e){return It(this,n,e)}withCalendar(n){const e=this.getISOFields();return new lr(e.isoYear,e.isoMonth,e.isoDay,n)}add(n,e){return this.calendar.dateAdd(this,n,e)}subtract(n,e){return this.calendar.dateAdd(this,U(To,n).negated(),e)}until(n,e){return gr(this,U(lr,n),!1,e)}since(n,e){return gr(this,U(lr,n),!0,e)}equals(n){return!Zn(this,U(lr,n))}toString(n){const e=An(n),t=this.getISOFields();return Qn(t)+ne(t.calendar.toString(),e)}toZonedDateTime(n){const e=function(n){let e,t;if("string"==typeof n)t=n;else{if("object"!=typeof n)throw new TypeError("Invalid options/timeZone argument");if(void 0!==n.id?t=n:(t=n.timeZone,e=n.plainTime),void 0===t)throw new TypeError("Invalid timeZone argument")}return{plainTime:e,timeZone:t}}(n),t=U(ht,e.timeZone),o=void 0===e.plainTime?void 0:U(eo,e.plainTime);return go({...this.getISOFields(),...o?o.getISOFields():X,timeZone:t})}toPlainDateTime(n){return Zo({...this.getISOFields(),...oo(n).getISOFields()})}toPlainYearMonth(){return co(this.getISOFields())}toPlainMonthDay(){return this.calendar.monthDayFromFields(this)}};function mr(n){return new lr(n.isoYear,n.isoMonth,n.isoDay,n.calendar)}function gr(n,e,t,o){return Do(wr(n,e,dr(n,e),t,E(o,6,6,6,9)))}function yr(n,e,t,o,r){return bo(pr(n,e,t,r.largestUnit),n,e,t,o,r)}function wr(n,e,t,o,r){return bo(t.dateUntil(n,e,{largestUnit:N[r.largestUnit]}),n,e,t,o,r)}function pr(n,e,t,o){if(!d(o))return vr(n,e,o);const r=mr({...n.getISOFields(),calendar:t});let i,s,a,c,u,h=mr({...e.getISOFields(),calendar:t});do{s=t.dateUntil(r,h,{largestUnit:N[o]}),i=n.add(s),a=vr(i,e,5),c=s.sign,u=a.sign}while(c&&u&&c!==u&&(h=h.add({days:u})));return l=a,{sign:(f=s).sign||l.sign,years:f.years+l.years,months:f.months+l.months,weeks:f.weeks+l.weeks,days:f.days+l.days,hours:f.hours+l.hours,minutes:f.minutes+l.minutes,seconds:f.seconds+l.seconds,milliseconds:f.milliseconds+l.milliseconds,microseconds:f.microseconds+l.microseconds,nanoseconds:f.nanoseconds+l.nanoseconds};var f,l}function vr(n,e,t){return rn(In(e)-In(n),t)}de(lr,"PlainDate"),se(lr),ue(lr,ce),Qt(lr,At({year:"numeric",month:"numeric",day:"numeric",weekday:void 0},{hour:void 0,minute:void 0,second:void 0}));var[Mr,Ir]=v(),Sr=class extends P{constructor(n){if(super(),"number"==typeof n)throw new TypeError("Must supply bigint, not number");var e;n=BigInt(n),((e=n)<-8640000000000000000000n||e>8640000000000000000000n)&&Tn(),Ir(this,n)}static from(n){if(n instanceof Sr)return new Sr(n.epochNanoseconds);const e=Ze(String(n)),t=e.offsetNanoseconds;if(void 0===t)throw new RangeError("Must specify an offset");return new Sr(yn(kn(e,1))-BigInt(t))}static fromEpochSeconds(n){return new Sr(BigInt(n)*t)}static fromEpochMilliseconds(n){return new Sr(BigInt(n)*e)}static fromEpochMicroseconds(e){return new Sr(e*n)}static fromEpochNanoseconds(n){return new Sr(n)}static compare(n,e){return Rn(U(Sr,n),U(Sr,e))}get epochNanoseconds(){return Mr(this)}add(n){return new Sr(ge(this.epochNanoseconds,U(To,n)))}subtract(n){return new Sr(ge(this.epochNanoseconds,K(U(To,n))))}until(n,e){return Fr(this,U(Sr,n),e)}since(n,e){return Fr(U(Sr,n),this,e)}round(n){const e=Z(n,void 0,0,5,!0);return new Sr(Ht(this.epochNanoseconds,e))}equals(n){return!Rn(this,U(Sr,n))}toString(n){const e=g(n).timeZone;return this.toZonedDateTimeISO(e??"UTC").toString({...n,offset:void 0===e?"never":"auto",timeZoneName:"never"})+(void 0===e?"Z":"")}toZonedDateTimeISO(n){return new mo(this.epochNanoseconds,n)}toZonedDateTime(n){if(!w(n))throw new TypeError("Must specify options");if(void 0===n.calendar)throw new TypeError("Must specify a calendar");if(void 0===n.timeZone)throw new TypeError("Must specify a timeZone");return new mo(this.epochNanoseconds,n.timeZone,n.calendar)}};function Fr(n,e,t){const o=E(t,3,0,0,5);return Do(function(n,e,t){return rn(z(e-n,a[t.smallestUnit]*t.roundingIncrement,t.roundingFunc),t.largestUnit)}(n.epochNanoseconds,e.epochNanoseconds,o))}function br(n){return Sr.fromEpochMilliseconds(n.valueOf())}de(Sr,"Instant"),oe(Sr),Qt(Sr,$t({year:"numeric",month:"numeric",day:"numeric",weekday:void 0,hour:"numeric",minute:"2-digit",second:"2-digit"},{timeZoneName:void 0},{}));var Nr=Symbol(),Or=Symbol(),Tr=Symbol(),Dr=class extends tt{constructor(n,e){const t=ot(n),o=function(n){const e={};for(const t in n){let o=n[t];w(o)&&(o=o.toString()),e[t]=o}return e}(e||{});super(t,o),this[Nr]=t,this[Or]=o,this[Tr]=new Map}format(n){const e=Yr(this,n);return e[0]===this?super.format(n):e[0].format(e[1])}formatToParts(n){return super.formatToParts.call(...Yr(this,n))}formatRange(n,e){return super.formatRange.call(...Er(this,n,e))}formatRangeToParts(n,e){return super.formatRangeToParts.call(...Er(this,n,e))}};function Yr(n,e){const t=Vt(e);if(t){const o=Zr(n,t);return[o.buildFormat(e),o.buildEpochMilli(e)]}return[n,e]}function Er(n,e,t){const o=Vt(e);if(o!==Vt(t))throw new TypeError("Mismatch of types");if(o){const r=Zr(n,o);return[r.buildFormat(e,t),r.buildEpochMilli(e),r.buildEpochMilli(t)]}return[n,e,t]}function Zr(n,e){const t=n[Tr];let o=t.get(e);return o||(o=function(n){const e={};return{buildFormat:function(t,o){const r=n.buildKey(t,o),i=r.join("|");return e[i]||(e[i]=n.buildFormat(...r))},buildEpochMilli:n.buildEpochMilli}}(e(n[Nr],n[Or])),t.set(e,o)),o}var Cr={zonedDateTimeISO:function(n){return go(Rr("iso8601",n))},zonedDateTime:function(n,e){return go(Rr(n,e))},plainDateTimeISO:function(n){return Zo(Rr("iso8601",n))},plainDateTime:function(n,e){return Zo(Rr(n,e))},plainDateISO:function(n){return mr(Rr("iso8601",n))},plainDate:function(n,e){return mr(Rr(n,e))},plainTimeISO:function(n){return to(Rr("iso8601",n))},instant:function(){return new Sr(Pr())},timeZone:Ur};function Ur(){return new ht((new tt).resolvedOptions().timeZone)}function Rr(n,e=Ur()){const t=U(ht,e);return{...yo(Pr(),t)[0],timeZone:t,calendar:U(ir,n)}}function Pr(){return BigInt(Date.now())*e}de(Cr,"Now");export{ir as Calendar,To as Duration,Dr as ExtendedDateTimeFormat,Sr as Instant,Cr as Now,lr as PlainDate,Eo as PlainDateTime,Ro as PlainMonthDay,eo as PlainTime,ao as PlainYearMonth,ht as TimeZone,mo as ZonedDateTime,br as dateToTemporalInstant};
 //# sourceMappingURL=impl.js.map

dist/index.js

@@ -1,2 +0,2 @@
-import*as a from"./impl.js";var n=globalThis.Temporal,t=n||a,PlainYearMonth=t.PlainYearMonth,PlainMonthDay=t.PlainMonthDay,PlainDate=t.PlainDate,PlainTime=t.PlainTime,PlainDateTime=t.PlainDateTime,ZonedDateTime=t.ZonedDateTime,Instant=t.Instant,Calendar=t.Calendar,TimeZone=t.TimeZone,Duration=t.Duration,e=t.Now,o=n?a=>a.toTemporalInstant():a.dateToTemporalInstant;export{Calendar,Duration,Instant,e as Now,PlainDate,PlainDateTime,PlainMonthDay,PlainTime,PlainYearMonth,TimeZone,ZonedDateTime,o as dateToTemporalInstant};
+import*as a from"./impl.js";var n=globalThis.Temporal,t=n||a,e=t.PlainYearMonth,o=t.PlainMonthDay,i=t.PlainDate,l=t.PlainTime,m=t.PlainDateTime,r=t.ZonedDateTime,T=t.Instant,s=t.Calendar,p=t.TimeZone,D=t.Duration,P=t.Now,d=n?a=>a.toTemporalInstant():a.dateToTemporalInstant;export{s as Calendar,D as Duration,T as Instant,P as Now,i as PlainDate,m as PlainDateTime,o as PlainMonthDay,l as PlainTime,e as PlainYearMonth,p as TimeZone,r as ZonedDateTime,d as dateToTemporalInstant};
 //# sourceMappingURL=index.js.map

dist/shim.js

@@ -1,2 +0,2 @@
-import{Calendar,Duration,ExtendedDateTimeFormat as a,Instant,Now as t,PlainDate,PlainDateTime,PlainMonthDay,PlainTime,PlainYearMonth,TimeZone,ZonedDateTime,dateToTemporalInstant as o}from"./impl.js";function n(){globalThis.Temporal||(globalThis.Temporal={PlainYearMonth:PlainYearMonth,PlainMonthDay:PlainMonthDay,PlainDate:PlainDate,PlainTime:PlainTime,PlainDateTime:PlainDateTime,ZonedDateTime:ZonedDateTime,Instant:Instant,Calendar:Calendar,TimeZone:TimeZone,Duration:Duration,Now:t},globalThis.Date.prototype.toTemporalInstant=function(){return o(this)},globalThis.Intl.DateTimeFormat=a)}export{n as shimTemporal};
+import{Calendar as a,Duration as t,ExtendedDateTimeFormat as o,Instant as n,Now as e,PlainDate as i,PlainDateTime as l,PlainMonthDay as r,PlainTime as m,PlainYearMonth as T,TimeZone as p,ZonedDateTime as s,dateToTemporalInstant as h}from"./impl.js";function D(){globalThis.Temporal||(globalThis.Temporal={PlainYearMonth:T,PlainMonthDay:r,PlainDate:i,PlainTime:m,PlainDateTime:l,ZonedDateTime:s,Instant:n,Calendar:a,TimeZone:p,Duration:t,Now:e},globalThis.Date.prototype.toTemporalInstant=function(){return h(this)},globalThis.Intl.DateTimeFormat=o)}export{D as shimTemporal};
 //# sourceMappingURL=shim.js.map

package.json

 {
   "name": "temporal-polyfill",
-  "version": "0.0.5",
+  "version": "0.0.6",
   "title": "Temporal Polyfill",
-  "description": "A spec-compliant Temporal JavaScript polyfill in 15kb",
+  "description": "A spec-compliant Temporal JavaScript polyfill in 16kb",
   "author": {
@@ -48,3 +48,2 @@ "name": "Adam Shaw",
     "/src",
-    "!/src/specs",
     "/dist",
@@ -51,0 +50,0 @@ "/*.d.ts"

README.md

 
 # temporal-polyfill
 
-A spec-compliant<super>*</super> [Temporal] JavaScript polyfill in 15kb<super>**</super>.
+A spec-compliant [Temporal] JavaScript polyfill in 16kb<super>*</super>.
 
-Works in modern browsers<super>***</super>, not Internet Explorer.
+Works in modern browsers<super>**</super>, not Internet Explorer.
 
@@ -48,10 +48,5 @@ [Codepen](https://codepen.io/arshaw/pen/VwrMQPJ?editors=1111)
 
+<super>*</super> = the size will shrink as the codebase is cleaned up
 
-<super>*</super> = *almost* spec-compliant.
-[a few more tests must pass](jest.config.cjs)
-([see results](https://github.com/fullcalendar/temporal/actions))
-
-<super>**</super> = the size will shrink as the codebase is cleaned up
-
-<super>***</super> = targets browsers that support [BigInt], however, more browser-compatibility
+<super>**</super> = targets browsers that support [BigInt], however, more browser-compatibility
 work is needed
@@ -58,0 +53,0 @@

src/argParse/diffOptions.ts

@@ -1,11 +0,13 @@
-import { UnitInt } from '../dateUtils/units'
+import { DAY, UnitInt, nanoIn } from '../dateUtils/units'
 import { DiffOptions, Unit } from '../public/types'
+import { RoundingFunc } from '../utils/math'
 import { ensureOptionsObj } from './refine'
-import { RoundingConfig, parseRoundingOptions } from './roundingOptions'
+import { parseRoundingModeOption } from './roundingMode'
 import { parseUnit } from './unitStr'
 
-export interface DiffConfig<
-  UnitType extends UnitInt = UnitInt
-> extends RoundingConfig<UnitType> {
+export interface DiffConfig<UnitType extends UnitInt = UnitInt> {
+  smallestUnit: UnitType
   largestUnit: UnitType
+  roundingFunc: RoundingFunc
+  roundingIncrement: number
 }
@@ -22,17 +24,13 @@
   maxUnit: UnitIntType,
-  forInstant?: boolean, // weird
-  forRounding?: boolean, // weird
+  forDurationRounding?: boolean, // TODO: change to 'defaultRoundingFunc'
 ): DiffConfig<UnitIntType> {
-  const roundingConfig = parseRoundingOptions<UnitArg, UnitIntType>(
-    options,
-    smallestUnitDefault,
-    minUnit,
-    maxUnit,
-    !forRounding,
-    forInstant,
+  const ensuredOptions = ensureOptionsObj(options)
+  const roundingIncrement = ensuredOptions.roundingIncrement ?? 1
+  const smallestUnit = parseUnit(ensuredOptions.smallestUnit, smallestUnitDefault, minUnit, maxUnit)
+  const roundingFunc = parseRoundingModeOption(
+    ensuredOptions,
+    forDurationRounding ? Math.round : Math.trunc,
   )
 
-  largestUnitDefault = Math.max(largestUnitDefault, roundingConfig.smallestUnit) as UnitIntType
-
-  let largestUnitArg = ensureOptionsObj(options).largestUnit
+  let largestUnitArg = ensuredOptions.largestUnit
   if (largestUnitArg === 'auto') {
@@ -42,12 +40,28 @@ largestUnitArg = undefined
 
+  largestUnitDefault = Math.max(largestUnitDefault, smallestUnit) as UnitIntType
   const largestUnit = parseUnit(largestUnitArg, largestUnitDefault, minUnit, maxUnit)
 
-  if (roundingConfig.smallestUnit > largestUnit) {
+  if (smallestUnit > largestUnit) {
     throw new RangeError('Bad smallestUnit/largestUnit')
   }
 
+  if (smallestUnit < DAY) {
+    const largerNano = nanoIn[smallestUnit + 1]
+    const incNano = nanoIn[smallestUnit] * roundingIncrement
+
+    if (largerNano === incNano) {
+      throw new RangeError('Must not equal larger unit')
+    }
+
+    if (largerNano % incNano) {
+      throw new RangeError('Must divide into larger unit')
+    }
+  }
+
   return {
+    smallestUnit,
     largestUnit,
-    ...roundingConfig,
+    roundingFunc,
+    roundingIncrement,
   }
 }

src/argParse/fieldStr.ts

@@ -26,12 +26,11 @@ import { strArrayToHash } from '../utils/obj'
 
-export const dateTimeFieldMap = {
-  ...dateFieldMap,
-  ...timeFieldMap,
+export const monthDayFieldMap = {
+  era: String,
+  eraYear: Number,
+  year: Number,
+  month: Number,
+  monthCode: String,
+  day: Number,
 }
 
-export const zonedDateTimeFieldMap = {
-  ...dateTimeFieldMap,
-  offset: String,
-}
-
 export const durationFieldMap = strArrayToHash(durationUnitNames, () => Number)

src/argParse/isoFormatOptions.ts

@@ -11,9 +11,9 @@ import {
 import { TimeToStringOptions, TimeToStringUnit } from '../public/types'
-import { RoundingFunc } from '../utils/math'
 import { OVERFLOW_REJECT } from './overflowHandling'
 import { constrainInt, ensureOptionsObj } from './refine'
 import { parseRoundingModeOption } from './roundingMode'
+import { RoundingConfig } from './roundingOptions'
 import { parseUnit } from './unitStr'
 
-export type DurationToStringUnitInt =
+export type DurationToStringUnitInt = // TODO: move this??? weird name/location for this
   typeof SECOND |
@@ -26,7 +26,6 @@ typeof MILLISECOND |
 
-export interface TimeToStringConfig<UnitType extends TimeToStringUnitInt = TimeToStringUnitInt> {
+export interface TimeToStringConfig<
+  UnitType extends TimeToStringUnitInt = TimeToStringUnitInt
+> extends RoundingConfig<UnitType> {
   fractionalSecondDigits: number | undefined
-  smallestUnit: UnitType
-  roundingMode: RoundingFunc
-  roundingIncrement: number // number of nanoseconds (rename? but good for gzip)
 }
@@ -47,3 +46,3 @@
   let smallestUnit = NANOSECOND as UnitType
-  let roundingIncrement = 1
+  let incNano = 1
   let digits: number | undefined
@@ -58,7 +57,7 @@
     )
-    roundingIncrement = nanoIn[smallestUnit]
+    incNano = nanoIn[smallestUnit]
     digits = unitDigitMap[smallestUnit] || 0
   } else if (digitsArg !== undefined && digitsArg !== 'auto') {
     digits = constrainInt(digitsArg, 0, 9, OVERFLOW_REJECT)
-    roundingIncrement = Math.pow(10, 9 - digits)
+    incNano = Math.pow(10, 9 - digits)
   }
@@ -69,5 +68,5 @@
     fractionalSecondDigits: digits,
-    roundingMode: parseRoundingModeOption(options, Math.trunc),
-    roundingIncrement,
+    roundingFunc: parseRoundingModeOption(options, Math.trunc),
+    incNano,
   }
 }

src/argParse/refine.ts

@@ -71,3 +71,2 @@ import { ValueOf } from '../utils/obj'
   const res: { [FieldName in keyof Map]?: ReturnType<Map[FieldName]> } = {}
-  let cnt = 0
 
@@ -77,10 +76,5 @@ for (const fieldName in refinerMap) {
       res[fieldName] = refinerMap[fieldName](input[fieldName])
-      cnt++
     }
   }
 
-  if (!cnt) {
-    throw new TypeError('Invalid object, no keys')
-  }
-
   return res
@@ -106,16 +100,1 @@ }
 }
-
-const invalidOverrideFields = ['calendar', 'timeZone']
-
-export function refineOverrideFields<Map extends { [fieldName: string]: (input: unknown) => any }>(
-  input: { [FieldName in keyof Map]?: unknown },
-  refinerMap: Map,
-): { [FieldName in keyof Map]?: ReturnType<Map[FieldName]> } {
-  for (const fieldName of invalidOverrideFields) {
-    if (input[fieldName] !== undefined) {
-      throw new TypeError(`Disallowed field ${fieldName}`)
-    }
-  }
-
-  return refineFields(input, refinerMap)
-}

src/argParse/roundingOptions.ts

@@ -1,3 +0,3 @@
-import { DAY, UnitInt, nanoIn, nanoInDay } from '../dateUtils/units'
-import { RoundingOptions, Unit } from '../public/types'
+import { DAY, DayTimeUnitInt, nanoIn, nanoInDay } from '../dateUtils/units'
+import { DayTimeUnit, RoundingOptions } from '../public/types'
 import { RoundingFunc } from '../utils/math'
@@ -8,49 +8,46 @@ import { ensureOptionsObj, isObjectLike } from './refine'
 
-export interface RoundingConfig<UnitType extends UnitInt = UnitInt> {
+export interface RoundingConfig<UnitType extends DayTimeUnitInt = DayTimeUnitInt> {
   smallestUnit: UnitType
-  roundingMode: RoundingFunc
-  roundingIncrement: number
+  roundingFunc: RoundingFunc
+  incNano: number
 }
 
 export function parseRoundingOptions<
-  UnitArgType extends Unit,
-  UnitType extends UnitInt
+  UnitArgType extends DayTimeUnit,
+  UnitType extends DayTimeUnitInt
 >(
-  options: Partial<RoundingOptions<UnitArgType>> | undefined,
+  options: Partial<RoundingOptions<UnitArgType>> | UnitArgType | undefined,
   smallestUnitDefault: UnitType | undefined,
   minUnit: UnitType,
   maxUnit: UnitType,
-  forDiffing?: boolean,
-  forInstant?: boolean,
+  relaxedDivisibility?: boolean,
 ): RoundingConfig<UnitType> {
-  if (smallestUnitDefault === undefined && !isObjectLike(options)) {
+  const optionsObj: Partial<RoundingOptions<UnitArgType>> | undefined =
+    typeof options === 'string'
+      ? { smallestUnit: options }
+      : options
+
+  if (smallestUnitDefault === undefined && !isObjectLike(optionsObj)) {
     throw new TypeError('Need rounding options')
   }
 
-  const ensuredOptions = ensureOptionsObj(options)
+  const ensuredOptions = ensureOptionsObj(optionsObj)
   const roundingIncrement = ensuredOptions.roundingIncrement ?? 1
   const smallestUnit = parseUnit(ensuredOptions.smallestUnit, smallestUnitDefault, minUnit, maxUnit)
+  const roundingFunc = parseRoundingModeOption(ensuredOptions, Math.round)
+  const incNano = nanoIn[smallestUnit] * roundingIncrement
 
-  // Instant rounding only cares about solar alignment
-  if (!forDiffing && forInstant) {
-    if (
-      smallestUnit < DAY &&
-      nanoInDay % roundingIncrement * nanoIn[smallestUnit]
-    ) {
-      throw new RangeError('Increment must evenly divide into 24 hours')
+  if (smallestUnit === DAY) {
+    if (roundingIncrement !== 1) {
+      throw new RangeError('When smallestUnit is days, roundingIncrement must be 1')
     }
   } else {
-    if (
-      (smallestUnit < DAY)
-        ? nanoIn[smallestUnit + 1] % roundingIncrement
-        : !forDiffing && roundingIncrement !== 1 // rounding can't have non-1 large units
-    ) {
-      throw new RangeError('roundingIncrement does not divide evenly into next highest unit')
+    const largerNano = relaxedDivisibility ? nanoInDay : nanoIn[smallestUnit + 1]
+
+    if (!relaxedDivisibility && largerNano === incNano) {
+      throw new RangeError('Must not equal larger unit')
     }
 
-    if (
-      smallestUnit < DAY &&
-      roundingIncrement * nanoIn[smallestUnit] >= nanoIn[smallestUnit + 1]
-    ) {
-      throw new RangeError('roundingIncrement must be less than next highest unit')
+    if (largerNano % incNano) {
+      throw new RangeError('Must divide into larger unit')
     }
@@ -61,5 +58,5 @@ }
     smallestUnit,
-    roundingMode: parseRoundingModeOption(options, forDiffing ? Math.trunc : Math.round),
-    roundingIncrement,
+    roundingFunc,
+    incNano,
   }
 }

src/argParse/unitStr.ts

@@ -1,12 +0,14 @@
-import { DateFields } from '../dateUtils/date'
-import { DurationFields } from '../dateUtils/duration'
-import { TimeFields } from '../dateUtils/time'
+import {
+  LocalDateFields,
+  LocalTimeFields,
+  LocalYearMonthFields,
+  UnsignedDurationFields,
+} from '../dateUtils/typesPrivate'
 import { UnitInt } from '../dateUtils/units'
-import { YearMonthFields } from '../dateUtils/yearMonth'
 import { DateUnit, TimeUnit, Unit } from '../public/types'
 import { strArrayToHash } from '../utils/obj'
 
-export type YearMonthUnitProper = keyof YearMonthFields
-export type DateUnitProper = keyof DateFields | 'week'
-export type TimeUnitProper = keyof TimeFields
+export type YearMonthUnitProper = keyof LocalYearMonthFields
+export type DateUnitProper = keyof LocalDateFields | 'week'
+export type TimeUnitProper = keyof LocalTimeFields
 
@@ -36,4 +38,4 @@ // These names must match the indexes of the Unit integers
 
-export const durationUnitNames: (keyof DurationFields)[] = unitNames.map(
-  (unit) => (unit + 's') as keyof DurationFields,
+export const durationUnitNames: (keyof UnsignedDurationFields)[] = unitNames.map(
+  (unit) => (unit + 's') as keyof UnsignedDurationFields,
 )
@@ -40,0 +42,0 @@

src/calendarImpl/bugs.ts

@@ -1,2 +0,2 @@
-import { isoToEpochMilli } from '../dateUtils/isoMath'
+import { isoToEpochMilli } from '../dateUtils/epoch'
 import { milliInDay, nanoInMilliBI } from '../dateUtils/units'
@@ -3,0 +3,0 @@ import { queryCalendarImpl } from './calendarImplQuery'

src/calendarImpl/intlCalendarImpl.ts

 import { computeDaysInYear } from '../dateUtils/calendar'
-import { hashIntlFormatParts, normalizeShortEra } from '../dateUtils/intlFormat'
 import {
@@ -8,3 +7,4 @@ addDaysMilli,
   isoToEpochMilli,
-} from '../dateUtils/isoMath'
+} from '../dateUtils/epoch'
+import { hashIntlFormatParts, normalizeShortEra } from '../dateUtils/intlFormat'
 import { OrigDateTimeFormat } from '../native/intlUtils'
@@ -236,3 +236,3 @@ import {
     // either part-way through the desired year or very slightly before
-    let epochMilli = isoToEpochMilli(this.guessISOYear(year))
+    let epochMilli = isoToEpochMilli(this.guessISOYear(year), 1, 1)
 
@@ -239,0 +239,0 @@ // ensure marker is in year+1

src/calendarImpl/isoCalendarImpl.ts

@@ -1,2 +0,2 @@
-import { epochMilliToISOFields, isoEpochLeapYear, isoToEpochMilli } from '../dateUtils/isoMath'
+import { epochMilliToISOFields, isoEpochLeapYear, isoToEpochMilli } from '../dateUtils/epoch'
 import { CalendarImpl, CalendarImplFields } from './calendarImpl'
@@ -3,0 +3,0 @@

src/calendarImpl/japaneseCalendarImpl.ts

@@ -0,3 +1,3 @@
+import { isoToEpochMilli } from '../dateUtils/epoch'
 import { hashIntlFormatParts, normalizeShortEra } from '../dateUtils/intlFormat'
-import { isoToEpochMilli } from '../dateUtils/isoMath'
 import { CalendarImplFields } from './calendarImpl'
@@ -4,0 +4,0 @@ import { GregoryCalendarImpl } from './gregoryCalendarImpl'

src/dateUtils/calendar.ts

@@ -5,3 +5,3 @@ import { ensureCalendarsEqual } from '../argParse/calendar'
 import { Calendar } from '../public/calendar'
-import { PlainDate } from '../public/plainDate'
+import { PlainDate, createDate } from '../public/plainDate'
 import { PlainDateTime } from '../public/plainDateTime'
@@ -12,4 +12,5 @@ import { PlainMonthDay } from '../public/plainMonthDay'
 import { ZonedDateTime } from '../public/zonedDateTime'
-import { DateFields, DateISOEssentials, constrainDateFields, createDate } from './date'
-import { diffDaysMilli, epochMilliToISOFields } from './isoMath'
+import { constrainDateFields } from './constrain'
+import { diffDaysMilli, epochMilliToISOFields } from './epoch'
+import { ISODateFields, InputDateFields, LocalDateFields } from './typesPrivate'
 
@@ -44,3 +45,3 @@ // Date-type Testing (TODO: move this?)
   disallowMonthDay?: boolean,
-): DateFields {
+): LocalDateFields {
   let date: PlainDate
@@ -69,3 +70,3 @@
   options: OverflowOptions | undefined,
-): DateISOEssentials {
+): ISODateFields {
   if (isDateISOInstance(dateLike)) {
@@ -75,3 +76,3 @@ return dateLike.getISOFields() // hard work has already been done
 
-  let { era, eraYear, year, month, monthCode, day } = dateLike as Partial<DateFields>
+  let { era, eraYear, year, month, monthCode, day } = dateLike as Partial<InputDateFields>
   const yearFromEra = (eraYear !== undefined && era !== undefined)
@@ -133,3 +134,3 @@ ? convertEraYear(calendarImpl.id, eraYear, era)
   disallowMonthDay?: boolean,
-): DateISOEssentials {
+): ISODateFields {
   if (isDateISOInstance(dateArg)) {
@@ -136,0 +137,0 @@ if (disallowMonthDay && dateArg instanceof PlainMonthDay) {

src/dateUtils/diff.ts

@@ -0,16 +1,102 @@
+import { DiffConfig } from '../argParse/diffOptions'
 import { OVERFLOW_CONSTRAIN } from '../argParse/overflowHandling'
+import { unitNames } from '../argParse/unitStr'
 import { CalendarImpl } from '../calendarImpl/calendarImpl'
-import { Duration } from '../public/duration'
-import { compareValues } from '../utils/math'
-import { addWholeMonths, addWholeYears } from './add'
-import { DateEssentials, compareDateFields, constrainDateFields } from './date'
-import { diffDaysMilli } from './isoMath'
-import { MONTH, UnitInt, WEEK, YEAR } from './units'
+import { Calendar } from '../public/calendar'
+import { createDate } from '../public/plainDate'
+import { CompareResult, DateUnit } from '../public/types'
+import { compareValues, roundToIncrement, roundToIncrementBI } from '../utils/math'
+import { compareLocalDateFields } from './compare'
+import { constrainDateFields } from './constrain'
+import { isoTimeToNano, nanoToDuration } from './dayAndTime'
+import { mergeDurations, signDuration } from './durationFields'
+import { EpochableObj, diffDaysMilli, toEpochNano } from './epoch'
+import { roundDurationSpan } from './roundingDuration'
+import { addMonths, addYears } from './translate'
+import {
+  DurationFields,
+  ISOTimeFields,
+  LocalDateFields,
+} from './typesPrivate'
+import {
+  HOUR,
+  MONTH,
+  TimeUnitInt,
+  UnitInt,
+  WEEK,
+  YEAR,
+  isDateUnit,
+  nanoIn,
+} from './units'
 
+export type DiffableObj = LocalDateFields & EpochableObj & {
+  add(durationFields: Partial<DurationFields>): DiffableObj
+}
+
+// used for zoned date times as well
+export function diffDateTimes(
+  dt0: DiffableObj,
+  dt1: DiffableObj,
+  calendar: Calendar,
+  flip: boolean,
+  diffConfig: DiffConfig,
+): DurationFields {
+  return roundDurationSpan(
+    diffAccurate(dt0, dt1, calendar, diffConfig.largestUnit),
+    dt0,
+    dt1,
+    calendar,
+    flip,
+    diffConfig,
+  )
+}
+
+export function diffDates(
+  d0: DiffableObj,
+  d1: DiffableObj,
+  calendar: Calendar,
+  flip: boolean,
+  diffConfig: DiffConfig,
+): DurationFields {
+  const balancedDuration = calendar.dateUntil(d0, d1, {
+    largestUnit: unitNames[diffConfig.largestUnit] as DateUnit,
+  })
+  return roundDurationSpan(balancedDuration, d0, d1, calendar, flip, diffConfig)
+}
+
+export function diffTimes(
+  t0: ISOTimeFields,
+  t1: ISOTimeFields,
+  diffConfig: DiffConfig<TimeUnitInt>,
+): DurationFields {
+  const roundedDiff = roundToIncrement(
+    isoTimeToNano(t1) - isoTimeToNano(t0),
+    nanoIn[diffConfig.smallestUnit] * diffConfig.roundingIncrement,
+    diffConfig.roundingFunc,
+  )
+  return nanoToDuration(BigInt(roundedDiff), diffConfig.largestUnit)
+}
+
+export function diffEpochNanos(
+  epochNano0: bigint,
+  epochNano1: bigint,
+  diffConfig: DiffConfig<TimeUnitInt>,
+): DurationFields {
+  const roundedDiff = roundToIncrementBI(
+    epochNano1 - epochNano0,
+    nanoIn[diffConfig.smallestUnit] * diffConfig.roundingIncrement,
+    diffConfig.roundingFunc,
+  )
+  return nanoToDuration(roundedDiff, diffConfig.largestUnit)
+}
+
+// Utils
+// -------------------------------------------------------------------------------------------------
+
 export function diffDateFields(
-  d0: DateEssentials,
-  d1: DateEssentials,
+  d0: LocalDateFields,
+  d1: LocalDateFields,
   calendarImpl: CalendarImpl,
   largestUnit: UnitInt,
-): Duration {
+): DurationFields {
   let years = 0; let months = 0; let weeks = 0; let days = 0
@@ -21,7 +107,7 @@
       years = wholeYearsUntil(d0, d1, calendarImpl)
-      d0 = addWholeYears(d0, years, calendarImpl, OVERFLOW_CONSTRAIN)
+      d0 = addYears(d0, years, calendarImpl, OVERFLOW_CONSTRAIN)
       // fallthrough
     case MONTH:
       months = wholeMonthsUntil(d0, d1, calendarImpl)
-      d0 = addWholeMonths(d0, months, calendarImpl, OVERFLOW_CONSTRAIN)
+      d0 = addMonths(d0, months, calendarImpl, OVERFLOW_CONSTRAIN)
   }
@@ -39,8 +125,19 @@
 
-  return new Duration(years, months, weeks, days)
+  return signDuration({
+    years,
+    months,
+    weeks,
+    days,
+    hours: 0,
+    minutes: 0,
+    seconds: 0,
+    milliseconds: 0,
+    microseconds: 0,
+    nanoseconds: 0,
+  })
 }
 
 function wholeYearsUntil(
-  d0: DateEssentials,
-  d1: DateEssentials,
+  d0: LocalDateFields,
+  d1: LocalDateFields,
   calendarImpl: CalendarImpl,
@@ -57,3 +154,3 @@ ): number {
 
-  const generalSign = compareDateFields(d1, d0)
+  const generalSign = compareLocalDateFields(d1, d0)
   const monthSign = compareValues(d1.month, newMonth) || compareValues(d1.day, newDay)
@@ -69,8 +166,8 @@
 function wholeMonthsUntil(
-  d0: DateEssentials,
-  d1: DateEssentials,
+  d0: LocalDateFields,
+  d1: LocalDateFields,
   calendarImpl: CalendarImpl,
 ): number {
   let monthsToAdd = 0
-  const generalSign = compareDateFields(d1, d0)
+  const generalSign = compareLocalDateFields(d1, d0)
 
@@ -106,1 +203,48 @@ if (generalSign) {
 }
+
+export function diffAccurate(
+  dt0: DiffableObj,
+  dt1: DiffableObj,
+  calendar: Calendar,
+  largestUnit: UnitInt,
+): DurationFields {
+  // a time unit
+  if (!isDateUnit(largestUnit)) {
+    return diffTimeScale(dt0, dt1, largestUnit)
+  }
+
+  const dateStart = createDate({ ...dt0.getISOFields(), calendar })
+  let dateMiddle = createDate({ ...dt1.getISOFields(), calendar })
+  let dateTimeMiddle: DiffableObj
+  let bigDuration: DurationFields
+  let timeDuration: DurationFields
+  let bigSign: CompareResult
+  let timeSign: CompareResult
+
+  do {
+    bigDuration = calendar.dateUntil(
+      dateStart,
+      dateMiddle,
+      { largestUnit: unitNames[largestUnit] as DateUnit },
+    )
+    dateTimeMiddle = dt0.add(bigDuration)
+    timeDuration = diffTimeScale(dateTimeMiddle, dt1, HOUR)
+    bigSign = bigDuration.sign
+    timeSign = timeDuration.sign
+  } while (
+    // did we overshoot? keep backing up a day
+    bigSign && timeSign &&
+    bigSign !== timeSign &&
+    (dateMiddle = dateMiddle.add({ days: timeSign })) // move dateMiddle closer to dt0
+  )
+
+  return mergeDurations(bigDuration, timeDuration)
+}
+
+function diffTimeScale(
+  dt0: EpochableObj,
+  dt1: EpochableObj,
+  largestUnit: TimeUnitInt,
+): DurationFields {
+  return nanoToDuration(toEpochNano(dt1) - toEpochNano(dt0), largestUnit)
+}

src/dateUtils/isoFieldValidation.ts

 import { checkEpochNanoBuggy } from '../calendarImpl/bugs'
-import { DateTimeISOEssentials } from '../dateUtils/dateTime'
-import { DateISOEssentials } from './date'
-import { isoFieldsToEpochNano, throwOutOfRange } from './isoMath'
+import { isoFieldsToEpochNano, throwOutOfRange } from './epoch'
+import { ISODateFields, ISODateTimeFields } from './typesPrivate'
 
@@ -25,3 +24,3 @@ /*
 
-export function validateYearMonth(isoFields: DateISOEssentials, calendarID: string): void {
+export function validateYearMonth(isoFields: ISODateFields, calendarID: string): void {
   // might throw an error
@@ -34,3 +33,3 @@ // moves between days in month
 
-export function validateDate(isoFields: DateISOEssentials, calendarID: string): void {
+export function validateDate(isoFields: ISODateFields, calendarID: string): void {
   const epochNano = isoFieldsToEpochNano(isoFields)
@@ -46,3 +45,3 @@
 
-export function validateDateTime(isoFields: DateTimeISOEssentials, calendarID: string): void {
+export function validateDateTime(isoFields: ISODateTimeFields, calendarID: string): void {
   const epochNano = isoFieldsToEpochNano(isoFields)
@@ -49,0 +48,0 @@

src/dateUtils/isoFormat.ts

@@ -9,12 +9,13 @@ import {
 import { isoCalendarID } from '../calendarImpl/isoCalendarImpl'
-import { TimeISOEssentials } from '../dateUtils/time'
 import { DateISOFields } from '../public/types'
 import { RoundingFunc, roundToIncrementBI } from '../utils/math'
 import { getSignStr, padZeros } from '../utils/string'
-import { DateISOEssentials } from './date'
-import { DateTimeISOEssentials } from './dateTime'
-import { nanoToDayTimeFields } from './dayTime'
-import { SignedDurationFields } from './duration'
+import { nanoToISOTime } from './dayAndTime'
 import {
-  HOUR,
+  DurationFields,
+  ISODateFields,
+  ISODateTimeFields,
+  ISOTimeFields,
+} from './typesPrivate'
+import {
   MINUTE,
@@ -31,3 +32,3 @@ SECOND,
 export function formatDateTimeISO(
-  fields: DateTimeISOEssentials,
+  fields: ISODateTimeFields,
   formatConfig: TimeToStringConfig,
@@ -38,7 +39,7 @@ ): string {
 
-export function formatDateISO(fields: DateISOEssentials): string {
+export function formatDateISO(fields: ISODateFields): string {
   return formatYearMonthISO(fields) + '-' + padZeros(fields.isoDay, 2)
 }
 
-export function formatYearMonthISO(fields: DateISOEssentials): string {
+export function formatYearMonthISO(fields: ISODateFields): string {
   const { isoYear } = fields
@@ -59,3 +60,3 @@ return (
 export function formatTimeISO(
-  fields: TimeISOEssentials,
+  fields: ISOTimeFields,
   formatConfig: TimeToStringConfig, // tighten type? remove roundingMode?
@@ -86,7 +87,7 @@ ): string {
 export function formatOffsetISO(offsetNano: number): string {
-  const fields = nanoToDayTimeFields(BigInt(Math.abs(offsetNano)), HOUR) // TODO: cleaner util
+  const [fields, dayDelta] = nanoToISOTime(Math.abs(offsetNano))
   const partialSecondsStr = formatPartialSeconds(
-    fields.millisecond!,
-    fields.microsecond!,
-    fields.nanosecond!,
+    fields.isoMillisecond,
+    fields.isoMicrosecond,
+    fields.isoNanosecond,
     undefined,
@@ -96,9 +97,12 @@ )[0]
   return getSignStr(offsetNano) +
-    padZeros(fields.hour!, 2) + ':' +
-    padZeros(fields.minute!, 2) +
-    ((fields.second || partialSecondsStr)
-      ? ':' + padZeros(fields.second!, 2) + partialSecondsStr
+    // format beyond 24:00 (TODO: somehow convince nanoToISOTime to have topheavy hours?)
+    padZeros(fields.isoHour + dayDelta * 24, 2) + ':' +
+    padZeros(fields.isoMinute, 2) +
+    ((fields.isoSecond || partialSecondsStr)
+      ? ':' + padZeros(fields.isoSecond, 2) + partialSecondsStr
       : '')
 }
 
+// you MUST pass in Calendar::toString()
+// this is WEIRD. proper solution: have a proper CalendarProtocol object
 export function formatCalendarID(
@@ -127,6 +131,6 @@ calendarID: string | undefined,
 export function formatDurationISO(
-  fields: SignedDurationFields,
+  fields: DurationFields,
   formatConfig: DurationToStringConfig,
 ): string {
-  const { smallestUnit, fractionalSecondDigits, roundingMode } = formatConfig
+  const { smallestUnit, fractionalSecondDigits, roundingFunc } = formatConfig
   const { sign } = fields
@@ -144,3 +148,3 @@ const hours = BigInt(fields.hours)
       fractionalSecondDigits,
-      roundingMode,
+      roundingFunc,
       smallestUnit,
@@ -152,2 +156,8 @@ )
 
+  // guarantee display of seconds if...
+  const forceSeconds =
+    fractionalSecondDigits !== undefined || // fractionalSecondDigits explicitly specified
+    partialSecondsStr || // partial seconds, either via fractionalSecondDigits or default
+    !sign // duration is completely empty, display 'PT0S'
+
   return (sign < 0 ? '-' : '') + 'P' +
@@ -160,3 +170,3 @@ collapseDurationTuples([
     ]) +
-    (hours || minutes || seconds || partialSecondsStr || !sign // see below for last 2 conditions
+    (hours || minutes || seconds || forceSeconds
       ? 'T' +
@@ -169,5 +179,3 @@ collapseDurationTuples([
           partialSecondsStr + 'S',
-          partialSecondsStr || !sign,
-          // ^^^ ensures seconds if partialSecondsStr OR
-          // OR ensures 'PT0S' if completely empty
+          forceSeconds,
         ],
@@ -174,0 +182,0 @@ ])

src/dateUtils/mixins.ts

@@ -124,1 +124,7 @@ import { unitNames } from '../argParse/unitStr'
 }
+
+// affects how objects are displayed in console
+
+export function attachStringTag(objOrClass: any, name: string): void {
+  (objOrClass.prototype || objOrClass)[Symbol.toStringTag] = 'Temporal.' + name
+}

src/dateUtils/parse.ts

@@ -1,16 +0,14 @@
-import { DateISOEssentials } from './date'
-import { DateTimeISOEssentials } from './dateTime'
-import { nanoToDayTimeFields } from './dayTime'
-import { isoEpochLeapYear } from './isoMath'
+import { isValidDateISO } from './constrain'
+import { nanoToISOTime } from './dayAndTime'
+import { isoEpochLeapYear } from './epoch'
 import {
   dateTimeRegExp,
   monthDayRegExp,
+  normalizeDashes,
   offsetRegExp,
   timeRegExp,
-  unicodeDashRegExp,
   yearMonthRegExp,
 } from './parseRegExp'
-import { TimeISOEssentials, timeLikeToISO } from './time'
+import { ISODateFields, ISODateTimeFields, ISOTimeFields } from './typesPrivate'
 import {
-  MILLISECOND,
   nanoInHour,
@@ -21,7 +19,7 @@ nanoInMinute,
 
-export interface DateParseResults extends DateISOEssentials {
+export interface DateParseResults extends ISODateFields {
   calendar: string | undefined
 }
 
-export interface DateTimeParseResult extends DateTimeISOEssentials {
+export interface DateTimeParseResult extends ISODateTimeFields {
   calendar: string | undefined
@@ -32,4 +30,4 @@ }
   timeZone: string | undefined
-  offset: number | undefined
-  Z?: boolean // whether ISO8601 specified with 'Z' as offset indicator
+  offsetNanoseconds: number | undefined
+  Z: boolean | undefined // whether ISO8601 specified with 'Z' as offset indicator
 }
@@ -79,4 +77,17 @@
 
-export function parseTime(str: string): TimeISOEssentials {
-  const res = tryParseTime(str) || tryParseDateTime(str)
+export function parseTime(str: string): ISOTimeFields {
+  let res = tryParseTime(str)
+
+  if (res !== undefined) {
+    // detect ambiguity in format
+    if (str.charAt(0) !== 'T') {
+      const tryOther = tryParseYearMonth(str) || tryParseMonthDay(str)
+      if (tryOther && isValidDateISO(tryOther)) {
+        res = undefined // invalid
+      }
+    }
+  } else {
+    res = tryParseDateTime(str, true)
+  }
+
   if (res === undefined) {
@@ -90,2 +101,4 @@ throw createParseError('time', str)
 
+const zRE = /^Z$/i
+
 export function tryParseZonedDateTime(str: string): ZonedDateTimeParseResult | undefined {
@@ -98,5 +111,13 @@ const m = dateTimeRegExp.exec(normalizeDashes(str))
 
-export function tryParseDateTime(str: string): DateTimeParseResult | undefined {
+export function tryParseDateTime(
+  str: string,
+  requireTime?: boolean,
+  allowZ?: boolean,
+): DateTimeParseResult | undefined {
   const m = dateTimeRegExp.exec(normalizeDashes(str))
-  if (m) {
+  if (
+    m &&
+    (allowZ || !zRE.test(m[12])) && // don't allow Z (12 means index 11 when unsliced)
+    (!requireTime || m[4]) // timeEverything (4 means index 3 when unsliced)
+  ) {
     return parseDateTimeParts(m.slice(1))
@@ -140,8 +161,8 @@ }
   const zOrOffset = parts[11]
-  let offset: number | undefined
+  let offsetNanoseconds: number | undefined
   let Z = false
 
   if (zOrOffset) {
-    Z = zOrOffset.toUpperCase() === 'Z'
-    offset = Z ? 0 : parseOffsetParts(parts.slice(12))
+    Z = zRE.test(zOrOffset)
+    offsetNanoseconds = Z ? 0 : parseOffsetParts(parts.slice(12))
   }
@@ -152,3 +173,3 @@
     timeZone: parts[21],
-    offset,
+    offsetNanoseconds,
     Z,
@@ -186,11 +207,7 @@ }
 
-function parseTimeParts(parts: string[]): TimeISOEssentials {
+function parseTimeParts(parts: string[]): ISOTimeFields {
   const isoSecond = toInt0(parts[4])
+
   return {
-    ...timeLikeToISO( // properties like isoMillisecond/isoMicrosecond
-      nanoToDayTimeFields( // properties like millisecond/microsecond
-        BigInt(parseNanoAfterDecimal(parts[6] || '')),
-        MILLISECOND,
-      ),
-    ),
+    ...nanoToISOTime(parseNanoAfterDecimal(parts[6] || ''))[0],
     isoHour: toInt0(parts[0]),
@@ -233,8 +250,4 @@ isoMinute: toInt0(parts[2]),
 
-export function normalizeDashes(str: string): string {
-  return str.replace(unicodeDashRegExp, '-')
-}
-
 export function createParseError(type: string, str: string): any {
   throw new RangeError(`Cannot parse ${type} '${str}'`)
 }

src/dateUtils/parseDuration.ts

 import { excludeUndefined } from '../utils/obj'
-import { nanoToDayTimeFields } from './dayTime'
-import { DurationFields, negateFields } from './duration'
-import { createParseError, normalizeDashes, parseNanoAfterDecimal, toIntMaybe } from './parse'
-import { durationRegExp } from './parseRegExp'
+import { nanoToDuration } from './dayAndTime'
+import { negateDuration, signDuration } from './durationFields'
+import { createParseError, parseNanoAfterDecimal, toIntMaybe } from './parse'
+import { durationRegExp, normalizeDashes } from './parseRegExp'
+import { DurationFields, UnsignedDurationFields } from './typesPrivate'
 import {
@@ -36,3 +37,3 @@ HOUR,
 
-    let fields: Partial<DurationFields> = excludeUndefined({
+    const fields: Partial<UnsignedDurationFields> = excludeUndefined({
       years: toIntMaybe(match[2]),
@@ -51,12 +52,15 @@ months: toIntMaybe(match[3]),
 
-    const small = nanoToDayTimeFields(BigInt(leftoverNano || 0), MILLISECOND)
-    fields.milliseconds = small.millisecond
-    fields.microseconds = small.microsecond
-    fields.nanoseconds = small.nanosecond
+    const small = nanoToDuration(BigInt(leftoverNano || 0), MILLISECOND)
+    // TODO: use mergeDurations somehow?
+    fields.milliseconds = small.milliseconds
+    fields.microseconds = small.microseconds
+    fields.nanoseconds = small.nanoseconds
 
+    let signedDuration = signDuration(fields as UnsignedDurationFields)
+
     if (match[1] === '-') {
-      fields = negateFields(fields)
+      signedDuration = negateDuration(signedDuration)
     }
 
-    return fields as DurationFields
+    return signedDuration
   }
@@ -63,0 +67,0 @@ }

src/dateUtils/parseRegExp.ts

@@ -26,3 +26,3 @@
   dateRegExpStr + // 0-2: date
-  '([T ]' +
+  '([T ]' + // 3: timeEverything
   timeRegExpStr + // 4-10: time
@@ -46,3 +46,3 @@ ')?'
 export const dateTimeRegExp = createRegExp(dateTimeRegExpStr + endingRegExpStr)
-export const timeRegExp = createRegExp(timeRegExpStr + endingRegExpStr)
+export const timeRegExp = createRegExp('T?' + timeRegExpStr + endingRegExpStr)
 export const offsetRegExp = createRegExp(offsetRegExpStr)
@@ -54,3 +54,3 @@
 // TODO: inject this into regexes above?
-export const unicodeDashRegExp = /\u2212/g
+const unicodeDashRegExp = /\u2212/g
 
@@ -60,1 +60,5 @@ function createRegExp(meat: string): RegExp {
 }
+
+export function normalizeDashes(str: string): string {
+  return str.replace(unicodeDashRegExp, '-')
+}

src/dateUtils/rounding.ts

@@ -1,139 +0,93 @@
-import { DiffConfig } from '../argParse/diffOptions'
+import { OFFSET_PREFER } from '../argParse/offsetHandling'
 import { RoundingConfig } from '../argParse/roundingOptions'
-import { durationUnitNames } from '../argParse/unitStr'
-import { Duration } from '../public/duration'
-import { PlainDateTime } from '../public/plainDateTime'
-import { DateISOFields, DateTimeISOFields } from '../public/types'
-import { ZonedDateTime } from '../public/zonedDateTime'
-import { RoundingFunc, roundToIncrement, roundToIncrementBI } from '../utils/math'
-import { addWholeDays } from './add'
-import { DateLikeInstance } from './calendar'
-import { DayTimeFields } from './dayTime'
-import { balanceDuration, createDuration, nanoToDuration, negateFields } from './duration'
-import { TimeFields, timeFieldsToNano, timeLikeToISO, wrapTimeOfDayNano } from './time'
-import { computeExactDuration } from './totalUnits'
-import { DayTimeUnitInt, NANOSECOND, isDateUnit, nanoIn } from './units'
-import { toNano } from './zonedDateTime'
+import { Calendar } from '../public/calendar'
+import { TimeZone } from '../public/timeZone'
+import { roundToIncrement, roundToIncrementBI } from '../utils/math'
+import { isoTimeToNano, nanoToISOTime, zeroISOTimeFields } from './dayAndTime'
+import { splitEpochNano } from './epoch'
+import { computeNanoInDay, computeZonedDateTimeEpochNano } from './offset'
+import { addDays } from './translate'
+import { ISODateTimeFields, ISOTimeFields } from './typesPrivate'
+import { DAY, DayTimeUnitInt, TimeUnitInt } from './units'
 
-export function roundBalancedDuration(
-  balancedDuration: Duration,
-  diffConfig: DiffConfig,
-  d0: DateLikeInstance,
-  d1: DateLikeInstance,
-  flip?: boolean,
-): Duration {
-  const { largestUnit, smallestUnit, roundingIncrement, roundingMode } = diffConfig
+export function roundDateTime(
+  fields: ISODateTimeFields,
+  roundingConfig: RoundingConfig<DayTimeUnitInt>,
+): ISODateTimeFields {
+  const timeNano = isoTimeToNano(fields)
+  const roundedTimeNano = roundNano(timeNano, roundingConfig)
+  const [isoTimeFields, dayDelta] = nanoToISOTime(roundedTimeNano)
 
-  // optimize for time units
-  if (!isDateUnit(largestUnit)) {
-    return nanoToDuration( // TODO: make util like diffTimeScale
-      roundNano(
-        (
-          toNano(d1 as (ZonedDateTime | PlainDateTime)) -
-          toNano(d0 as (ZonedDateTime | PlainDateTime))
-        ) * (flip ? -1n : 1n),
-        diffConfig as RoundingConfig<DayTimeUnitInt>,
-      ),
-      largestUnit,
-    )
-  }
+  const dayStartTranslated = addDays(fields, dayDelta)
+  return { ...dayStartTranslated, ...isoTimeFields }
+}
 
-  let durationLike = computeExactDuration(balancedDuration, smallestUnit, d0, d1)
-  const unitName = durationUnitNames[smallestUnit]
+export function roundTime(
+  fields: ISOTimeFields,
+  roundingConfig: RoundingConfig<TimeUnitInt>,
+): ISOTimeFields {
+  const timeNano = isoTimeToNano(fields)
+  const roundedTimeNano = roundNano(timeNano, roundingConfig)
+  const [isoTimeFields] = nanoToISOTime(roundedTimeNano)
+  return isoTimeFields
+}
 
-  function doRound() {
-    const orig = durationLike[unitName]! // computeExactDuration guarantees value
-    durationLike[unitName] = roundToIncrement(
-      orig,
-      roundingIncrement,
-      roundingMode,
-    )
-  }
+export function roundEpochNano(
+  epochNano: bigint,
+  roundingConfig: RoundingConfig<TimeUnitInt>,
+): bigint {
+  const [dayEpochNano, timeNano] = splitEpochNano(epochNano)
+  const roundedTimeNano = roundNano(timeNano, roundingConfig)
+  return dayEpochNano + BigInt(roundedTimeNano)
+}
 
-  if (roundingMode === Math.round) {
-    // 'halfExpand' cares about point-to-point translation
-    doRound()
-  }
-  if (flip) {
-    durationLike = negateFields(durationLike)
-  }
-  if (roundingMode !== Math.round) {
-    // other rounding techniques operate on final number
-    doRound()
-  }
-  // TODO: instead of this mess, have a halfExpandDirection arg
+// returns epochNano!
+export function roundZonedDateTimeFields(
+  fields: ISODateTimeFields & { calendar: Calendar, timeZone: TimeZone },
+  offsetNanoseconds: number,
+  roundingConfig: RoundingConfig<DayTimeUnitInt>,
+): bigint {
+  const { calendar, timeZone } = fields
+  let timeNano = isoTimeToNano(fields)
+  let isoTimeFields: ISOTimeFields
+  let dayDelta: number
 
-  let resDuration = createDuration(durationLike)
-
-  // rebalance
-  if (smallestUnit > NANOSECOND) {
-    if (flip) {
-      // yuck
-      resDuration = balanceDuration(resDuration.negated(), largestUnit, d0).negated()
-    } else {
-      resDuration = balanceDuration(resDuration, largestUnit, d0)
-    }
+  if (roundingConfig.smallestUnit === DAY) {
+    isoTimeFields = zeroISOTimeFields
+    dayDelta = roundingConfig.roundingFunc(timeNano / computeNanoInDay(fields))
+  } else {
+    timeNano = roundNano(timeNano, roundingConfig)
+    ;([isoTimeFields, dayDelta] = nanoToISOTime(timeNano))
   }
 
-  return resDuration
+  const dayStartTranslated = addDays(fields, dayDelta)
+  return computeZonedDateTimeEpochNano(
+    {
+      ...dayStartTranslated,
+      ...isoTimeFields,
+      offsetNanoseconds,
+      calendar, // !!!
+      timeZone, // !!!
+    },
+    false,
+    OFFSET_PREFER, // for offsetNanoseconds conflicts
+  )
 }
 
-export function roundTimeToSpecialDay(
-  timeFields: TimeFields,
-  ourNanoInDay: number,
-  roundingFunc: RoundingFunc,
-): DayTimeFields {
-  const nano = timeFieldsToNano(timeFields)
-  return {
-    day: roundingFunc(Number(nano) / ourNanoInDay),
-    hour: 0,
-    minute: 0,
-    second: 0,
-    millisecond: 0,
-    microsecond: 0,
-    nanosecond: 0,
-  }
-}
+// low-level utils (just for day-and-time)
 
-export function roundTime(
-  timeFields: TimeFields,
-  nanoIncrement: number,
-  roundingFunc: RoundingFunc,
-): DayTimeFields {
-  return wrapTimeOfDayNano(
-    roundToIncrementBI(
-      timeFieldsToNano(timeFields),
-      nanoIncrement,
-      roundingFunc,
-    ),
+export function roundNano(nano: number, roundingConfig: RoundingConfig<DayTimeUnitInt>): number {
+  return roundToIncrement(
+    nano,
+    roundingConfig.incNano,
+    roundingConfig.roundingFunc,
   )
 }
 
-// convenience func
-export function roundNano(
-  nano: bigint,
-  roundingConfig: RoundingConfig,
-): bigint {
+export function roundNanoBI(nano: bigint, roundingConfig: RoundingConfig<DayTimeUnitInt>): bigint {
   return roundToIncrementBI(
     nano,
-    computeRoundingNanoIncrement(roundingConfig),
-    roundingConfig.roundingMode,
+    roundingConfig.incNano,
+    roundingConfig.roundingFunc,
   )
 }
-
-// util
-export function computeRoundingNanoIncrement(roundingConfig: RoundingConfig): number {
-  return nanoIn[roundingConfig.smallestUnit] * roundingConfig.roundingIncrement
-}
-
-// util
-export function combineISOWithDayTimeFields(
-  isoFields: DateISOFields,
-  dayTimeFields: DayTimeFields,
-): DateTimeISOFields {
-  const dateISOFields = addWholeDays(isoFields, dayTimeFields.day) // preserves `calendar`
-  return {
-    ...dateISOFields,
-    ...timeLikeToISO(dayTimeFields),
-  }
-}

src/dateUtils/totalUnits.ts

 import { durationUnitNames } from '../argParse/unitStr'
-import { Duration } from '../public/duration'
-import { PlainDate } from '../public/plainDate'
-import { PlainDateTime } from '../public/plainDateTime'
-import { DateTimeArg, DurationLike } from '../public/types'
-import { ZonedDateTime } from '../public/zonedDateTime'
-import { DateLikeInstance } from './calendar'
-import { dayTimeFieldsToNano } from './dayTime'
-import {
-  balanceComplexDuration,
-  durationToDayTimeFields,
-  extractRelativeTo,
-} from './duration'
-import { isoFieldsToEpochNano } from './isoMath'
-import { UnitInt, YEAR, isDayTimeUnit, nanoIn } from './units'
+import { Calendar } from '../public/calendar'
+import { durationDayTimeToNano } from './dayAndTime'
+import { DiffableObj } from './diff'
+import { computeLargestDurationUnit } from './durationFields'
+import { spanDurationFromDateTime } from './durationSpan'
+import { toEpochNano } from './epoch'
+import { DurationFields, UnsignedDurationFields } from './typesPrivate'
+import { DAY, UnitInt, YEAR, isDayTimeUnit, nanoIn } from './units'
 
 export function computeTotalUnits(
-  duration: Duration,
+  duration: DurationFields,
   unit: UnitInt,
-  relativeToArg: DateTimeArg | undefined,
+  relativeTo: DiffableObj | undefined,
+  calendar: Calendar | undefined,
 ): number {
-  const fields = durationToDayTimeFields(duration)
   if (
-    relativeToArg === undefined &&
-    fields &&
+    relativeTo === undefined &&
+    computeLargestDurationUnit(duration) <= DAY &&
     isDayTimeUnit(unit)
   ) {
-    return Number(dayTimeFieldsToNano(fields)) / nanoIn[unit]
+    // TODO: accidentaly loss of precision?
+    return Number(durationDayTimeToNano(duration)) / nanoIn[unit]
   }
-  const relativeTo = extractRelativeTo(relativeToArg) // throws an exception if undefined
-  const balancedDuration = balanceComplexDuration(
+
+  if (!relativeTo) {
+    throw new RangeError('Need relativeTo')
+  }
+
+  const [balancedDuration, relativeToTranslated] = spanDurationFromDateTime(
     duration,
     unit,
     relativeTo,
+    calendar!,
     true, // dissolveWeeks
   )
+
   const durationLike = computeExactDuration(
@@ -41,5 +42,7 @@ balancedDuration,
     relativeTo,
-    relativeTo.add(balancedDuration),
+    relativeToTranslated,
   )
-  return durationLike[durationUnitNames[unit]]! // computeExactDuration guarantees this
+
+  const unitName = durationUnitNames[unit] as keyof UnsignedDurationFields
+  return durationLike[unitName]
 }
@@ -52,14 +55,18 @@
 export function computeExactDuration(
-  balancedDuration: Duration,
+  balancedDuration: DurationFields,
   smallestUnit: UnitInt,
-  d0: DateLikeInstance,
-  d1: DateLikeInstance,
-): DurationLike {
-  const smallestUnitName = durationUnitNames[smallestUnit]
+  dt0: DiffableObj,
+  dt1: DiffableObj,
+): DurationFields {
+  const smallestUnitName = durationUnitNames[smallestUnit] as keyof UnsignedDurationFields
   const { sign } = balancedDuration
 
+  if (!sign) { // prevents division by zero
+    return balancedDuration
+  }
+
   // make a new duration object that excludes units smaller than smallestUnit
-  const dur: DurationLike = {}
+  const dur: Partial<DurationFields> = {}
   for (let unit = YEAR; unit >= smallestUnit; unit--) {
-    const durationUnit = durationUnitNames[unit]
+    const durationUnit = durationUnitNames[unit] as keyof UnsignedDurationFields
     dur[durationUnit] = balancedDuration[durationUnit]
@@ -69,22 +76,13 @@ }
   // a single additional unit of `unit`
-  const incDur: DurationLike = { [smallestUnitName]: sign }
-  const startDateTime = d0.add(dur)
+  const incDur: Partial<DurationFields> = { [smallestUnitName]: sign }
+  const startDateTime = dt0.add(dur)
   const endDateTime = startDateTime.add(incDur)
 
-  const startNano = realisticEpochNano(startDateTime)
-  const endNano = realisticEpochNano(endDateTime)
-  const middleNano = realisticEpochNano(d1)
+  const startNano = toEpochNano(startDateTime)
+  const endNano = toEpochNano(endDateTime)
+  const middleNano = toEpochNano(dt1)
   const unitFrac = Number(middleNano - startNano) / Number(endNano - startNano) * sign
 
   dur[smallestUnitName]! += unitFrac // above loop populated this
-  return dur
+  return dur as DurationFields
 }
-
-// TODO: use this everywhere instead of isoFieldsToEpochNano?
-// Make a separate sub-util JUST for PlainDatetime/PlainDate?
-function realisticEpochNano(dt: ZonedDateTime | PlainDateTime | PlainDate): bigint {
-  const { epochNanoseconds } = dt as ZonedDateTime
-  return epochNanoseconds !== undefined
-    ? epochNanoseconds
-    : isoFieldsToEpochNano(dt.getISOFields())
-}

src/dateUtils/week.ts

 import { isoCalendarImpl } from '../calendarImpl/isoCalendarImpl'
 import { positiveModulo } from '../utils/math'
 import { computeDayOfYear, computeDaysInYear } from './calendar'
-import { computeISODayOfWeek } from './isoMath'
+import { computeISODayOfWeek } from './epoch'
 
@@ -6,0 +6,0 @@ // TODO: fix lots of 1-index problems!!!

src/impl.ts

@@ -12,2 +12,3 @@ /*
 export { ExtendedDateTimeFormat } from './native/intlExtend'
+// TODO: fix problem noted in tests/exports.js
 
@@ -14,0 +15,0 @@ export { PlainYearMonth } from './public/plainYearMonth'

src/native/intlFactory.ts

 import { isoCalendarID } from '../calendarImpl/isoCalendarImpl'
-import { createDateTime } from '../dateUtils/dateTime'
-import { isoFieldsToEpochMilli } from '../dateUtils/isoMath'
-import { zeroTimeISOFields } from '../dateUtils/zonedDateTime'
+import { zeroISOTimeFields } from '../dateUtils/dayAndTime'
+import { isoFieldsToEpochMilli } from '../dateUtils/epoch'
 import { Calendar } from '../public/calendar'
+import { createDateTime } from '../public/plainDateTime'
 import { TimeZone } from '../public/timeZone'
@@ -103,3 +103,3 @@ import { DateISOFields } from '../public/types'
   const plainDateTime = createDateTime({ // necessary? pass directly into getInstantFor?
-    ...zeroTimeISOFields,
+    ...zeroISOTimeFields,
     ...entity.getISOFields(),
@@ -106,0 +106,0 @@ })

src/public/calendar.ts

@@ -7,4 +7,5 @@ import {
 } from '../argParse/calendar'
+import { dateFieldMap, monthDayFieldMap, yearMonthFieldMap } from '../argParse/fieldStr'
 import { parseOverflowOption } from '../argParse/overflowHandling'
-import { ensureOptionsObj } from '../argParse/refine'
+import { ensureOptionsObj, refineFields } from '../argParse/refine'
 import { parseUnit } from '../argParse/unitStr'
@@ -16,3 +17,2 @@ import { checkEpochMilliBuggy } from '../calendarImpl/bugs'
 import { AbstractObj, ensureObj } from '../dateUtils/abstract'
-import { addToDateFields } from '../dateUtils/add'
 import {
@@ -26,9 +26,11 @@ computeDayOfYear,
 import { diffDateFields } from '../dateUtils/diff'
-import { computeISODayOfWeek, isoEpochLeapYear, isoToEpochMilli } from '../dateUtils/isoMath'
-import { MonthDayFields } from '../dateUtils/monthDay'
+import { computeISODayOfWeek, isoEpochLeapYear, isoToEpochMilli } from '../dateUtils/epoch'
+import { attachStringTag } from '../dateUtils/mixins'
 import { tryParseDateTime } from '../dateUtils/parse'
+import { translateDate } from '../dateUtils/translate'
+import { InputDateFields } from '../dateUtils/typesPrivate'
 import { DAY, DateUnitInt, YEAR } from '../dateUtils/units'
 import { computeWeekOfISOYear } from '../dateUtils/week'
 import { createWeakMap } from '../utils/obj'
-import { Duration } from './duration'
+import { Duration, createDuration } from './duration'
 import { PlainDate } from './plainDate'
@@ -72,3 +74,3 @@ import { PlainDateTime } from './plainDateTime'
     }
-    const parsed = tryParseDateTime(String(arg))
+    const parsed = tryParseDateTime(String(arg), false, true) // allowZ=true
     return new Calendar(
@@ -81,3 +83,5 @@ parsed // a date-time string?
 
-  get id(): string { return getImpl(this).id }
+  get id(): string {
+    return this.toString()
+  }
 
@@ -187,4 +191,6 @@ era(arg: PlainYearMonth | DateArg | PlainDateTime | ZonedDateTime): string | undefined {
 
-  dateFromFields(arg: DateLikeFields, options?: OverflowOptions): PlainDate {
-    const isoFields = queryDateISOFields(arg, getImpl(this), options)
+  dateFromFields(fields: DateLikeFields, options?: OverflowOptions): PlainDate {
+    const refinedFields = refineFields(fields, dateFieldMap) as DateLikeFields
+    const isoFields = queryDateISOFields(refinedFields, getImpl(this), options)
+
     return new PlainDate(
@@ -198,4 +204,6 @@ isoFields.isoYear,
 
-  yearMonthFromFields(arg: YearMonthLikeFields, options?: OverflowOptions): PlainYearMonth {
-    const isoFields = queryDateISOFields({ ...arg, day: 1 }, getImpl(this), options)
+  yearMonthFromFields(fields: YearMonthLikeFields, options?: OverflowOptions): PlainYearMonth {
+    const refinedFields = refineFields(fields, yearMonthFieldMap) as YearMonthLikeFields
+    const isoFields = queryDateISOFields({ ...refinedFields, day: 1 }, getImpl(this), options)
+
     return new PlainYearMonth(
@@ -211,4 +219,6 @@ isoFields.isoYear,
     const impl = getImpl(this)
-    let { era, eraYear, year, month, monthCode, day } = fields as Partial<MonthDayFields>
 
+    const refinedFields = refineFields(fields, monthDayFieldMap) as MonthDayLikeFields
+    let { era, eraYear, year, month, monthCode, day } = refinedFields as Partial<InputDateFields>
+
     if (day === undefined) {
@@ -251,3 +261,3 @@ throw new TypeError('required property \'day\' missing or undefined')
     const overflowHandling = parseOverflowOption(options)
-    const isoFields = addToDateFields(date, duration, impl, overflowHandling)
+    const isoFields = translateDate(date, duration, impl, overflowHandling)
 
@@ -270,9 +280,32 @@ return new PlainDate(
 
-    ensureCalendarsEqual(getCommonCalendar(d0, d1), this)
-    return diffDateFields(d0, d1, impl, largestUnit)
+    ensureCalendarsEqual(this, getCommonCalendar(d0, d1))
+
+    return createDuration(
+      diffDateFields(d0, d1, impl, largestUnit),
+    )
   }
 
-  toString(): string { return this.id }
+  /*
+  Given a date-type's core field names, returns the field names that should be
+  given to Calendar::yearMonthFromFields/monthDayFromFields/dateFromFields
+  */
+  fields(inFields: string[]): string[] {
+    return inFields.slice() // copy
+  }
+
+  /*
+  Given a date-instance, and fields to override, returns the fields that should be
+  given to Calendar::yearMonthFromFields/monthDayFromFields/dateFromFields
+  */
+  mergeFields(baseFields: any, additionalFields: any): any {
+    return mergeCalFields(baseFields, additionalFields)
+  }
+
+  toString(): string {
+    return getImpl(this).id
+  }
 }
 
+attachStringTag(Calendar, 'Calendar')
+
 export function createDefaultCalendar(): Calendar {
@@ -282,2 +315,53 @@ return new Calendar(isoCalendarID)
 
+// TODO: better types?
+export function mergeCalFields(baseFields: any, additionalFields: any): any {
+  const merged = { ...baseFields, ...additionalFields } as any
+
+  if (baseFields.year !== undefined) {
+    delete merged.era
+    delete merged.eraYear
+    delete merged.year
+
+    let anyAdditionalYear = false
+
+    if (additionalFields.era !== undefined || additionalFields.eraYear !== undefined) {
+      merged.era = additionalFields.era
+      merged.eraYear = additionalFields.eraYear
+      anyAdditionalYear = true
+    }
+    if (additionalFields.year !== undefined) {
+      merged.year = additionalFields.year
+      anyAdditionalYear = true
+    }
+    if (!anyAdditionalYear) {
+      merged.year = baseFields.year
+    }
+  }
+
+  if (baseFields.monthCode !== undefined) {
+    delete merged.monthCode
+    delete merged.month
+
+    let anyAdditionalMonth = false
+
+    if (additionalFields.month !== undefined) {
+      merged.month = additionalFields.month
+      anyAdditionalMonth = true
+    }
+    if (additionalFields.monthCode !== undefined) {
+      merged.monthCode = additionalFields.monthCode
+      anyAdditionalMonth = true
+    }
+    if (!anyAdditionalMonth) {
+      merged.monthCode = baseFields.monthCode
+    }
+  }
+
+  if (baseFields.day !== undefined) {
+    merged.day = additionalFields.day ?? baseFields.day
+  }
+
+  return merged
+}
+
 // utils
@@ -284,0 +368,0 @@

src/public/duration.ts

@@ -1,20 +0,23 @@
-import { durationFieldMap } from '../argParse/fieldStr'
+import { parseDiffOptions } from '../argParse/diffOptions'
 import { DurationToStringUnitInt, parseTimeToStringOptions } from '../argParse/isoFormatOptions'
-import { ensureOptionsObj, refineFields, refineOverrideFields } from '../argParse/refine'
-import { parseUnit } from '../argParse/unitStr'
+import { ensureOptionsObj, isObjectLike } from '../argParse/refine'
+import { parseTotalConfig } from '../argParse/totalOptions'
 import { AbstractNoValueObj, ensureObj } from '../dateUtils/abstract'
+import { compareDurations } from '../dateUtils/compare'
 import {
-  SignedDurationFields,
-  addAndBalanceDurations,
-  compareDurations,
-  createDuration,
-  negateFields,
-  refineDurationFields,
-  roundAndBalanceDuration,
-} from '../dateUtils/duration'
+  absDuration,
+  computeLargestDurationUnit,
+  negateDuration,
+  refineDurationNumbers,
+} from '../dateUtils/durationFields'
+import { processDurationFields } from '../dateUtils/fromAndWith'
 import { formatDurationISO } from '../dateUtils/isoFormat'
+import { attachStringTag } from '../dateUtils/mixins'
 import { parseDuration } from '../dateUtils/parseDuration'
+import { extractRelativeTo } from '../dateUtils/relativeTo'
+import { roundDuration } from '../dateUtils/roundingDuration'
 import { computeTotalUnits } from '../dateUtils/totalUnits'
+import { addDurationFields } from '../dateUtils/translate'
+import { DurationFields, UnsignedDurationFields } from '../dateUtils/typesPrivate'
 import { NANOSECOND, SECOND, UnitInt, YEAR } from '../dateUtils/units'
-import { createWeakMap, mapHash } from '../utils/obj'
 import {
@@ -30,6 +33,8 @@ CompareResult,
   LocalesArg,
+  Unit,
   ZonedDateTimeArg,
-} from './types'
+} from '../public/types'
+import { createWeakMap } from '../utils/obj'
 
-const [getFields, setFields] = createWeakMap<Duration, SignedDurationFields>()
+const [getFields, setFields] = createWeakMap<Duration, DurationFields>()
 
@@ -50,3 +55,3 @@ export class Duration extends AbstractNoValueObj {
     super()
-    setFields(this, refineDurationFields({
+    const numberFields = processDurationFields({ // TODO: overkill. does hasAnyProps
       years,
@@ -62,3 +67,4 @@ months,
       nanoseconds,
-    }))
+    })
+    setFields(this, refineDurationNumbers(numberFields))
   }
@@ -69,3 +75,3 @@
       typeof arg === 'object'
-        ? refineFields(arg, durationFieldMap)
+        ? processDurationFields(arg)
         : parseDuration(arg),
@@ -80,3 +86,7 @@ )
   ): CompareResult {
-    return compareDurations(a, b, ensureOptionsObj(options).relativeTo)
+    return compareDurations(
+      ensureObj(Duration, a),
+      ensureObj(Duration, b),
+      extractRelativeTo(ensureOptionsObj(options).relativeTo),
+    )
   }
@@ -100,3 +110,3 @@
       ...getFields(this),
-      ...refineOverrideFields(fields, durationFieldMap),
+      ...processDurationFields(fields),
     })
@@ -106,41 +116,54 @@ }
   negated(): Duration {
-    return createDuration(
-      negateFields(getFields(this) as Partial<SignedDurationFields>), // TODO: fix types
-    )
+    return createDuration(negateDuration(getFields(this)))
   }
 
   abs(): Duration {
-    return createDuration(
-      mapHash(
-        getFields(this),
-        (num: number) => Math.abs(num),
-      ),
-    )
+    return createDuration(absDuration(getFields(this)))
   }
 
   add(other: DurationArg, options?: { relativeTo?: ZonedDateTimeArg | DateTimeArg}): Duration {
-    return addAndBalanceDurations(
-      this,
-      ensureObj(Duration, other),
-      ensureOptionsObj(options).relativeTo,
-    )
+    return addDurations(this, ensureObj(Duration, other), options)
   }
 
   subtract(other: DurationArg, options?: { relativeTo?: ZonedDateTimeArg | DateTimeArg}): Duration {
-    return addAndBalanceDurations(
-      this,
-      ensureObj(Duration, other).negated(),
-      ensureOptionsObj(options).relativeTo,
-    )
+    return addDurations(this, negateDuration(ensureObj(Duration, other)), options)
   }
 
-  round(options: DurationRoundingOptions): Duration {
-    return roundAndBalanceDuration(this, options)
+  round(options: DurationRoundingOptions | Unit): Duration {
+    const optionsObj: DurationRoundingOptions = typeof options === 'string'
+      ? { smallestUnit: options }
+      : options
+
+    if (!isObjectLike(optionsObj)) {
+      throw new TypeError('Must specify options') // best place for this?
+    } else if (optionsObj.largestUnit === undefined && optionsObj.smallestUnit === undefined) {
+      throw new RangeError('Must specify either largestUnit or smallestUnit')
+    }
+
+    const defaultLargestUnit = computeLargestDurationUnit(this)
+    const diffConfig = parseDiffOptions<Unit, UnitInt>(
+      optionsObj,
+      defaultLargestUnit, // largestUnitDefault
+      NANOSECOND, // smallestUnitDefault
+      NANOSECOND, // minUnit
+      YEAR, // maxUnit
+      true, // forDurationRounding
+    )
+
+    const relativeTo = extractRelativeTo(optionsObj.relativeTo)
+
+    return createDuration(
+      roundDuration(this, diffConfig, relativeTo, relativeTo ? relativeTo.calendar : undefined),
+    )
   }
 
-  total(options: DurationTotalOptions): number {
+  total(options: DurationTotalOptions | Unit): number {
+    const totalConfig = parseTotalConfig(options)
+    const relativeTo = extractRelativeTo(totalConfig.relativeTo)
+
     return computeTotalUnits(
       this,
-      parseUnit<UnitInt>(ensureOptionsObj(options).unit, undefined, NANOSECOND, YEAR),
-      options.relativeTo,
+      totalConfig.unit,
+      relativeTo,
+      relativeTo ? relativeTo.calendar : undefined,
     )
@@ -161,1 +184,30 @@ }
 }
+
+attachStringTag(Duration, 'Duration')
+
+export function createDuration(fields: UnsignedDurationFields): Duration {
+  return new Duration(
+    fields.years,
+    fields.months,
+    fields.weeks,
+    fields.days,
+    fields.hours,
+    fields.minutes,
+    fields.seconds,
+    fields.milliseconds,
+    fields.microseconds,
+    fields.nanoseconds,
+  )
+}
+
+function addDurations(
+  d0: DurationFields,
+  d1: DurationFields,
+  options?: { relativeTo?: ZonedDateTimeArg | DateTimeArg },
+): Duration {
+  const relativeTo = extractRelativeTo(ensureOptionsObj(options).relativeTo)
+
+  return createDuration(
+    addDurationFields(d0, d1, relativeTo, relativeTo ? relativeTo.calendar : undefined),
+  )
+}

src/public/instant.ts

@@ -0,15 +1,28 @@
+import { parseDiffOptions } from '../argParse/diffOptions'
 import { OVERFLOW_REJECT } from '../argParse/overflowHandling'
 import { ensureOptionsObj, isObjectLike } from '../argParse/refine'
+import { parseRoundingOptions } from '../argParse/roundingOptions'
 import { AbstractNoValueObj, ensureObj } from '../dateUtils/abstract'
-import { constrainDateTimeISO } from '../dateUtils/dateTime'
-import { addToInstant, compareInstants, diffInstants, roundInstant } from '../dateUtils/instant'
+import { compareEpochObjs } from '../dateUtils/compare'
+import { constrainDateTimeISO } from '../dateUtils/constrain'
+import { diffEpochNanos } from '../dateUtils/diff'
+import { negateDuration } from '../dateUtils/durationFields'
+import { isoFieldsToEpochNano } from '../dateUtils/epoch'
 import { validateInstant } from '../dateUtils/isoFieldValidation'
-import { isoFieldsToEpochNano } from '../dateUtils/isoMath'
-import { ComputedEpochFields, mixinEpochFields } from '../dateUtils/mixins'
+import { ComputedEpochFields, attachStringTag, mixinEpochFields } from '../dateUtils/mixins'
 import { parseZonedDateTime } from '../dateUtils/parse'
-import { nanoInMicroBI, nanoInMilliBI, nanoInSecondBI } from '../dateUtils/units'
+import { roundEpochNano } from '../dateUtils/rounding'
+import { translateEpochNano } from '../dateUtils/translate'
+import {
+  HOUR,
+  NANOSECOND,
+  SECOND,
+  nanoInMicroBI,
+  nanoInMilliBI,
+  nanoInSecondBI,
+} from '../dateUtils/units'
 import { createZonedFormatFactoryFactory } from '../native/intlFactory'
 import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
 import { createWeakMap } from '../utils/obj'
-import { Duration } from './duration'
+import { Duration, createDuration } from './duration'
 import {
@@ -32,2 +45,5 @@ CalendarArg,
     super()
+    if (typeof epochNanoseconds === 'number') {
+      throw new TypeError('Must supply bigint, not number')
+    }
     epochNanoseconds = BigInt(epochNanoseconds) // cast
@@ -44,3 +60,3 @@ validateInstant(epochNanoseconds)
     const fields = parseZonedDateTime(String(arg))
-    const offsetNano = fields.offset
+    const offsetNano = fields.offsetNanoseconds
     if (offsetNano === undefined) {
@@ -73,3 +89,3 @@ throw new RangeError('Must specify an offset')
   static compare(a: InstantArg, b: InstantArg): CompareResult {
-    return compareInstants(
+    return compareEpochObjs(
       ensureObj(Instant, a),
@@ -83,7 +99,11 @@ ensureObj(Instant, b),
   add(durationArg: DurationArg): Instant {
-    return addToInstant(this, ensureObj(Duration, durationArg))
+    return new Instant(
+      translateEpochNano(this.epochNanoseconds, ensureObj(Duration, durationArg)),
+    )
   }
 
   subtract(durationArg: DurationArg): Instant {
-    return addToInstant(this, ensureObj(Duration, durationArg).negated())
+    return new Instant(
+      translateEpochNano(this.epochNanoseconds, negateDuration(ensureObj(Duration, durationArg))),
+    )
   }
@@ -100,7 +120,11 @@
   round(options: TimeRoundingOptions): Instant {
-    return roundInstant(this, options)
+    const roundingConfig = parseRoundingOptions(options, undefined, NANOSECOND, HOUR, true)
+
+    return new Instant(
+      roundEpochNano(this.epochNanoseconds, roundingConfig),
+    )
   }
 
   equals(other: InstantArg): boolean {
-    return compareInstants(this, ensureObj(Instant, other)) === 0
+    return !compareEpochObjs(this, ensureObj(Instant, other))
   }
@@ -110,3 +134,3 @@
     const timeZoneArg = ensureOptionsObj(options).timeZone
-    const zonedDateTime = this.toZonedDateTimeISO(timeZoneArg ?? 'UTC')
+    const zonedDateTime = this.toZonedDateTimeISO(timeZoneArg ?? 'UTC') // TODO: don't use util!!!
     return zonedDateTime.toString({
@@ -144,2 +168,3 @@ ...options,
 export interface Instant extends ToLocaleStringMethods {}
+attachStringTag(Instant, 'Instant')
 mixinEpochFields(Instant)
@@ -157,1 +182,19 @@ mixinLocaleStringMethods(Instant, createZonedFormatFactoryFactory({
 }, {}))
+
+function diffInstants(
+  inst0: Instant,
+  inst1: Instant,
+  options: TimeDiffOptions | undefined,
+): Duration {
+  const diffConfig = parseDiffOptions(
+    options,
+    SECOND,
+    NANOSECOND,
+    NANOSECOND,
+    HOUR,
+  )
+
+  return createDuration(
+    diffEpochNanos(inst0.epochNanoseconds, inst1.epochNanoseconds, diffConfig),
+  )
+}

src/public/now.ts

@@ -0,47 +1,65 @@
+import { isoCalendarID } from '../calendarImpl/isoCalendarImpl'
+import { ensureObj } from '../dateUtils/abstract'
+import { attachStringTag } from '../dateUtils/mixins'
+import { ISODateTimeFields } from '../dateUtils/typesPrivate'
 import { nanoInMilliBI } from '../dateUtils/units'
 import { OrigDateTimeFormat } from '../native/intlUtils'
+import { Calendar } from './calendar'
 import { Instant } from './instant'
-import { PlainDate } from './plainDate'
-import { PlainDateTime } from './plainDateTime'
-import { PlainTime } from './plainTime'
+import { PlainDate, createDate } from './plainDate'
+import { PlainDateTime, createDateTime } from './plainDateTime'
+import { PlainTime, createTime } from './plainTime'
 import { TimeZone } from './timeZone'
 import { CalendarArg, TimeZoneArg } from './types'
-import { ZonedDateTime } from './zonedDateTime'
+import {
+  ZonedDateTime,
+  buildZonedDateTimeISOFields,
+  createZonedDateTimeFromFields,
+} from './zonedDateTime'
 
-function getZonedDateTimeISO(timeZoneArg: TimeZoneArg = getTimeZone()): ZonedDateTime {
-  return getInstant().toZonedDateTimeISO(timeZoneArg)
+const Now = {
+  zonedDateTimeISO: getZonedDateTimeISO,
+  zonedDateTime: getZonedDateTime,
+  plainDateTimeISO: getPlainDateTimeISO,
+  plainDateTime: getPlainDateTime,
+  plainDateISO: getPlainDateISO,
+  plainDate: getPlainDate,
+  plainTimeISO: getPlainTimeISO,
+  instant: getInstant,
+  timeZone: getTimeZone,
 }
+attachStringTag(Now, 'Now')
 
+export { Now }
+
+function getZonedDateTimeISO(timeZoneArg?: TimeZoneArg): ZonedDateTime {
+  return createZonedDateTimeFromFields(buidZonedFields(isoCalendarID, timeZoneArg))
+}
+
 function getZonedDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): ZonedDateTime {
-  if (calendarArg === undefined) {
-    throw new RangeError('Must specify calendar') // bad
-  }
-  return getInstant().toZonedDateTime({
-    calendar: calendarArg,
-    timeZone: timeZoneArg ?? getTimeZone(),
-  })
+  return createZonedDateTimeFromFields(buidZonedFields(calendarArg, timeZoneArg))
 }
 
-function getPlainDateTimeISO(timeZoneArg: TimeZoneArg = getTimeZone()): PlainDateTime {
-  return getZonedDateTimeISO(timeZoneArg).toPlainDateTime()
+function getPlainDateTimeISO(timeZoneArg?: TimeZoneArg): PlainDateTime {
+  return createDateTime(buidZonedFields(isoCalendarID, timeZoneArg))
 }
 
 function getPlainDateTime(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDateTime {
-  return getZonedDateTime(calendarArg, timeZoneArg).toPlainDateTime()
+  return createDateTime(buidZonedFields(calendarArg, timeZoneArg))
 }
 
-function getPlainDateISO(timeZoneArg: TimeZoneArg = getTimeZone()): PlainDate {
-  return getPlainDateTimeISO(timeZoneArg).toPlainDate()
+function getPlainDateISO(timeZoneArg: TimeZoneArg): PlainDate {
+  return createDate(buidZonedFields(isoCalendarID, timeZoneArg))
 }
 
 function getPlainDate(calendarArg: CalendarArg, timeZoneArg?: TimeZoneArg): PlainDate {
-  return getPlainDateTime(calendarArg, timeZoneArg).toPlainDate()
+  return createDate(buidZonedFields(calendarArg, timeZoneArg))
 }
 
-function getPlainTimeISO(timeZoneArg: TimeZoneArg = getTimeZone()): PlainTime {
-  return getInstant().toZonedDateTimeISO(timeZoneArg).toPlainTime()
+function getPlainTimeISO(timeZoneArg: TimeZoneArg): PlainTime {
+  return createTime(buidZonedFields(isoCalendarID, timeZoneArg))
 }
 
 function getInstant(): Instant {
-  return new Instant(BigInt(Date.now()) * nanoInMilliBI)
+  return new Instant(getEpochNano())
 }
@@ -53,12 +71,19 @@
 
-export const Now = {
-  zonedDateTimeISO: getZonedDateTimeISO,
-  zonedDateTime: getZonedDateTime,
-  plainDateTimeISO: getPlainDateTimeISO,
-  plainDateTime: getPlainDateTime,
-  plainDateISO: getPlainDateISO,
-  plainDate: getPlainDate,
-  plainTimeISO: getPlainTimeISO,
-  instant: getInstant,
-  timeZone: getTimeZone,
+// utils
+
+function buidZonedFields(
+  calendarArg: CalendarArg,
+  timeZoneArg: TimeZoneArg = getTimeZone(),
+): ISODateTimeFields & { timeZone: TimeZone, calendar: Calendar } {
+  const timeZone = ensureObj(TimeZone, timeZoneArg)
+  return {
+    ...buildZonedDateTimeISOFields(getEpochNano(), timeZone)[0],
+    // build these in to buildZonedDateTimeISOFields?
+    timeZone,
+    calendar: ensureObj(Calendar, calendarArg),
+  }
 }
+
+function getEpochNano(): bigint {
+  return BigInt(Date.now()) * nanoInMilliBI
+}

src/public/plainDate.ts

@@ -1,16 +0,11 @@
-import { extractCalendar } from '../argParse/calendar'
+import { getCommonCalendar } from '../argParse/calendar'
 import { parseCalendarDisplayOption } from '../argParse/calendarDisplay'
 import { parseDiffOptions } from '../argParse/diffOptions'
-import { dateFieldMap } from '../argParse/fieldStr'
 import { OVERFLOW_REJECT, parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
-import {
-  compareDates,
-  constrainDateISO,
-  createDate,
-  diffDates,
-  overrideDateFields,
-} from '../dateUtils/date'
-import { createDateTime } from '../dateUtils/dateTime'
+import { compareDateTimes } from '../dateUtils/compare'
+import { constrainDateISO } from '../dateUtils/constrain'
+import { zeroISOTimeFields } from '../dateUtils/dayAndTime'
+import { diffDates } from '../dateUtils/diff'
+import { processDateFromFields, processDateWithFields } from '../dateUtils/fromAndWith'
 import { validateDate } from '../dateUtils/isoFieldValidation'
@@ -20,2 +15,3 @@ import { formatCalendarID, formatDateISO } from '../dateUtils/isoFormat'
   DateCalendarFields,
+  attachStringTag,
   dateCalendarFields,
@@ -27,12 +23,12 @@ mixinCalendarFields,
 import { refineBaseObj } from '../dateUtils/parseRefine'
-import { ensureLooseTime } from '../dateUtils/time'
 import { DAY, DateUnitInt, YEAR } from '../dateUtils/units'
-import { createYearMonth } from '../dateUtils/yearMonth'
 import { createPlainFormatFactoryFactory } from '../native/intlFactory'
 import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
 import { Calendar, createDefaultCalendar } from './calendar'
-import { Duration } from './duration'
-import { PlainDateTime } from './plainDateTime'
+import { Duration, createDuration } from './duration'
+import { PlainDateTime, createDateTime } from './plainDateTime'
 import { PlainMonthDay } from './plainMonthDay'
-import { PlainYearMonth } from './plainYearMonth'
+import { PlainTime, ensureLooseTime } from './plainTime'
+import { PlainYearMonth, createYearMonth } from './plainYearMonth'
+import { TimeZone } from './timeZone'
 import {
@@ -44,3 +40,2 @@ CalendarArg,
   DateISOFields,
-  DateLikeFields,
   DateOverrides,
@@ -53,4 +48,5 @@ DateToStringOptions,
   TimeZoneArg,
+  TimeZoneProtocol,
 } from './types'
-import { ZonedDateTime } from './zonedDateTime'
+import { ZonedDateTime, createZonedDateTimeFromFields } from './zonedDateTime'
 
@@ -83,4 +79,3 @@ export class PlainDate extends AbstractISOObj<DateISOFields> {
     if (typeof arg === 'object') {
-      const refinedFields = refineFields(arg, dateFieldMap) as DateLikeFields
-      return extractCalendar(arg).dateFromFields(refinedFields, options)
+      return processDateFromFields(arg, options)
     }
@@ -92,3 +87,3 @@
   static compare(a: DateArg, b: DateArg): CompareResult {
-    return compareDates(
+    return compareDateTimes(
       ensureObj(PlainDate, a),
@@ -100,5 +95,3 @@ ensureObj(PlainDate, b),
   with(fields: DateOverrides, options?: OverflowOptions): PlainDate {
-    const refinedFields = refineOverrideFields(fields, dateFieldMap)
-    const mergedFields = overrideDateFields(refinedFields, this)
-    return this.calendar.dateFromFields(mergedFields, options)
+    return processDateWithFields(this, fields, options)
   }
@@ -125,6 +118,7 @@
   until(other: DateArg, options?: DateDiffOptions): Duration {
-    return diffDates(
+    return diffPlainDates(
       this,
       ensureObj(PlainDate, other),
-      parseDiffOptions<DateUnit, DateUnitInt>(options, DAY, DAY, DAY, YEAR),
+      false,
+      options,
     )
@@ -134,7 +128,7 @@ }
   since(other: DateArg, options?: DateDiffOptions): Duration {
-    return diffDates(
+    return diffPlainDates(
       this,
       ensureObj(PlainDate, other),
-      parseDiffOptions<DateUnit, DateUnitInt>(options, DAY, DAY, DAY, YEAR),
       true,
+      options,
     )
@@ -144,3 +138,3 @@ }
   equals(other: DateArg): boolean {
-    return compareDates(this, ensureObj(PlainDate, other)) === 0
+    return !compareDateTimes(this, ensureObj(PlainDate, other))
   }
@@ -153,7 +147,19 @@
     return formatDateISO(fields) +
-      formatCalendarID(fields.calendar.id, calendarDisplay)
+      formatCalendarID(fields.calendar.toString(), calendarDisplay)
   }
 
-  toZonedDateTime(options: { plainTime?: TimeArg, timeZone: TimeZoneArg }): ZonedDateTime {
-    return this.toPlainDateTime(options.plainTime).toZonedDateTime(options.timeZone)
+  toZonedDateTime(
+    options: { plainTime?: TimeArg, timeZone: TimeZoneArg } | TimeZoneArg,
+  ): ZonedDateTime {
+    const refinedOptions = processToZonedDateTimeOptions(options)
+    const timeZone = ensureObj(TimeZone, refinedOptions.timeZone)
+    const plainTime = refinedOptions.plainTime === undefined
+      ? undefined
+      : ensureObj(PlainTime, refinedOptions.plainTime)
+
+    return createZonedDateTimeFromFields({
+      ...this.getISOFields(),
+      ...(plainTime ? plainTime.getISOFields() : zeroISOTimeFields),
+      timeZone,
+    })
   }
@@ -175,2 +181,3 @@
 export interface PlainDate extends ToLocaleStringMethods {}
+attachStringTag(PlainDate, 'PlainDate')
 mixinISOFields(PlainDate)
@@ -188,1 +195,57 @@ mixinCalendarFields(PlainDate, dateCalendarFields)
 }))
+
+// creation
+export function createDate(isoFields: DateISOFields): PlainDate {
+  return new PlainDate(
+    isoFields.isoYear,
+    isoFields.isoMonth,
+    isoFields.isoDay,
+    isoFields.calendar,
+  )
+}
+
+// argument processing
+function processToZonedDateTimeOptions(
+  options?: { plainTime?: TimeArg, timeZone: TimeZoneArg } | TimeZoneArg,
+): {
+    plainTime?: TimeArg,
+    timeZone: TimeZoneArg,
+  } {
+  let plainTime: TimeArg | undefined
+  let timeZone: TimeZoneArg | undefined
+
+  if (typeof options === 'string') {
+    timeZone = options
+  } else if (typeof options === 'object') {
+    if ((options as TimeZoneProtocol).id !== undefined) {
+      timeZone = options as TimeZoneProtocol
+    } else {
+      timeZone = options.timeZone
+      plainTime = (options as { plainTime?: TimeArg }).plainTime
+    }
+    if (timeZone === undefined) {
+      throw new TypeError('Invalid timeZone argument')
+    }
+  } else {
+    throw new TypeError('Invalid options/timeZone argument')
+  }
+
+  return { plainTime, timeZone }
+}
+
+function diffPlainDates(
+  pd0: PlainDate,
+  pd1: PlainDate,
+  flip: boolean,
+  options: DateDiffOptions | undefined,
+): Duration {
+  return createDuration(
+    diffDates(
+      pd0,
+      pd1,
+      getCommonCalendar(pd0, pd1),
+      flip,
+      parseDiffOptions<DateUnit, DateUnitInt>(options, DAY, DAY, DAY, YEAR),
+    ),
+  )
+}

src/public/plainDateTime.ts

@@ -1,21 +0,14 @@
-import { extractCalendar, getStrangerCalendar } from '../argParse/calendar'
+import { getCommonCalendar, getStrangerCalendar } from '../argParse/calendar'
 import { parseCalendarDisplayOption } from '../argParse/calendarDisplay'
-import { dateTimeFieldMap } from '../argParse/fieldStr'
+import { parseDiffOptions } from '../argParse/diffOptions'
 import { parseTimeToStringOptions } from '../argParse/isoFormatOptions'
 import { OVERFLOW_REJECT, parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
+import { parseRoundingOptions } from '../argParse/roundingOptions'
 import { timeUnitNames } from '../argParse/unitStr'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
-import { createDate } from '../dateUtils/date'
-import {
-  addToDateTime,
-  compareDateTimes,
-  constrainDateTimeISO,
-  createDateTime,
-  dateTimeFieldsToISO,
-  diffDateTimes,
-  overrideDateTimeFields,
-  roundDateTime,
-  roundDateTimeWithOptions,
-} from '../dateUtils/dateTime'
+import { compareDateTimes } from '../dateUtils/compare'
+import { constrainDateTimeISO } from '../dateUtils/constrain'
+import { diffDateTimes } from '../dateUtils/diff'
+import { negateDuration } from '../dateUtils/durationFields'
+import { processDateTimeFromFields, processDateTimeWithFields } from '../dateUtils/fromAndWith'
 import { validateDateTime } from '../dateUtils/isoFieldValidation'
@@ -25,2 +18,3 @@ import { formatCalendarID, formatDateTimeISO } from '../dateUtils/isoFormat'
   DateCalendarFields,
+  attachStringTag,
   dateCalendarFields,
@@ -32,12 +26,14 @@ mixinCalendarFields,
 import { refineBaseObj } from '../dateUtils/parseRefine'
-import { TimeFields, createTime, ensureLooseTime } from '../dateUtils/time'
-import { createYearMonth } from '../dateUtils/yearMonth'
+import { roundDateTime } from '../dateUtils/rounding'
+import { translateDateTime } from '../dateUtils/translate'
+import { DurationFields, LocalTimeFields } from '../dateUtils/typesPrivate'
+import { DAY, DayTimeUnitInt, NANOSECOND, UnitInt, YEAR } from '../dateUtils/units'
 import { createPlainFormatFactoryFactory } from '../native/intlFactory'
 import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
 import { Calendar, createDefaultCalendar } from './calendar'
-import { Duration } from './duration'
-import { PlainDate } from './plainDate'
+import { Duration, createDuration } from './duration'
+import { PlainDate, createDate } from './plainDate'
 import { PlainMonthDay } from './plainMonthDay'
-import { PlainTime } from './plainTime'
-import { PlainYearMonth } from './plainYearMonth'
+import { PlainTime, createTime, ensureLooseTime } from './plainTime'
+import { PlainYearMonth, createYearMonth } from './plainYearMonth'
 import { TimeZone } from './timeZone'
@@ -50,6 +46,6 @@ import {
   DateTimeISOFields,
-  DateTimeLikeFields,
   DateTimeOverrides,
   DateTimeRoundingOptions,
   DateTimeToStringOptions,
+  DayTimeUnit,
   DiffOptions,
@@ -61,2 +57,3 @@ Disambiguation,
   TimeZoneArg,
+  Unit,
 } from './types'
@@ -106,8 +103,3 @@ import { ZonedDateTime } from './zonedDateTime'
         : typeof arg === 'object'
-          ? dateTimeFieldsToISO(
-            refineFields(arg, dateTimeFieldMap) as DateTimeLikeFields,
-            options,
-            overflowHandling,
-            extractCalendar(arg),
-          )
+          ? processDateTimeFromFields(arg, overflowHandling, options)
           : refineBaseObj(parseDateTime(String(arg))),
@@ -125,11 +117,5 @@ )
   with(fields: DateTimeOverrides, options?: OverflowOptions): PlainDateTime {
-    const refinedFields = refineOverrideFields(fields, dateTimeFieldMap)
-    const mergedFields = overrideDateTimeFields(refinedFields, this)
+    const overflowHandling = parseOverflowOption(options)
     return createDateTime(
-      dateTimeFieldsToISO(
-        mergedFields,
-        options,
-        parseOverflowOption(options),
-        this.calendar,
-      ),
+      processDateTimeWithFields(this, fields, overflowHandling, options),
     )
@@ -162,23 +148,43 @@ }
   add(durationArg: DurationArg, options?: OverflowOptions): PlainDateTime {
-    return addToDateTime(this, ensureObj(Duration, durationArg), options)
+    return translatePlainDateTime(this, ensureObj(Duration, durationArg), options)
   }
 
   subtract(durationArg: DurationArg, options?: OverflowOptions): PlainDateTime {
-    return addToDateTime(this, ensureObj(Duration, durationArg).negated(), options)
+    return translatePlainDateTime(this, negateDuration(ensureObj(Duration, durationArg)), options)
   }
 
   until(other: DateTimeArg, options?: DiffOptions): Duration {
-    return diffDateTimes(this, ensureObj(PlainDateTime, other), options)
+    return diffPlainDateTimes(
+      this,
+      ensureObj(PlainDateTime, other),
+      false,
+      options,
+    )
   }
 
   since(other: DateTimeArg, options?: DiffOptions): Duration {
-    return diffDateTimes(this, ensureObj(PlainDateTime, other), options, true)
+    return diffPlainDateTimes(
+      this,
+      ensureObj(PlainDateTime, other),
+      true,
+      options,
+    )
   }
 
-  round(options: DateTimeRoundingOptions): PlainDateTime {
-    return roundDateTimeWithOptions(this, options)
+  round(options: DateTimeRoundingOptions | DayTimeUnit): PlainDateTime {
+    const roundingConfig = parseRoundingOptions<DayTimeUnit, DayTimeUnitInt>(
+      options,
+      undefined, // no default. required
+      NANOSECOND, // minUnit
+      DAY, // maxUnit
+    )
+
+    return createDateTime({
+      ...roundDateTime(this.getISOFields(), roundingConfig),
+      calendar: this.calendar,
+    })
   }
 
   equals(other: DateTimeArg): boolean {
-    return compareDateTimes(this, ensureObj(PlainDateTime, other)) === 0
+    return !compareDateTimes(this, ensureObj(PlainDateTime, other))
   }
@@ -189,13 +195,8 @@
     const calendarDisplay = parseCalendarDisplayOption(options)
-    const isoFields = roundDateTime(
-      this,
-      formatConfig.roundingIncrement,
-      formatConfig.roundingMode,
-    ).getISOFields() // TODO: somehow have ISO fields returned directly
+    const isoFields = roundDateTime(this.getISOFields(), formatConfig)
 
     return formatDateTimeISO(isoFields, formatConfig) +
-      formatCalendarID(isoFields.calendar.id, calendarDisplay)
+      formatCalendarID(this.calendar.toString(), calendarDisplay)
   }
 
-  // workhorse for converting to ZonedDateTime for other objects
   toZonedDateTime(
@@ -208,7 +209,4 @@ timeZoneArg: TimeZoneArg,
 
-    return new ZonedDateTime(
-      instant.epochNanoseconds,
-      timeZone,
-      this.calendar,
-    )
+    // more succinct than createZonedDateTimeFromFields
+    return new ZonedDateTime(instant.epochNanoseconds, timeZone, this.calendar)
   }
@@ -224,4 +222,5 @@
 export interface PlainDateTime extends DateCalendarFields { calendar: Calendar }
-export interface PlainDateTime extends TimeFields {}
+export interface PlainDateTime extends LocalTimeFields {}
 export interface PlainDateTime extends ToLocaleStringMethods {}
+attachStringTag(PlainDateTime, 'PlainDateTime')
 mixinISOFields(PlainDateTime, timeUnitNames)
@@ -238,1 +237,48 @@ mixinCalendarFields(PlainDateTime, dateCalendarFields)
 }, {}))
+
+// creation
+export function createDateTime(isoFields: DateTimeISOFields): PlainDateTime {
+  return new PlainDateTime(
+    isoFields.isoYear,
+    isoFields.isoMonth,
+    isoFields.isoDay,
+    isoFields.isoHour,
+    isoFields.isoMinute,
+    isoFields.isoSecond,
+    isoFields.isoMillisecond,
+    isoFields.isoMicrosecond,
+    isoFields.isoNanosecond,
+    isoFields.calendar,
+  )
+}
+
+function translatePlainDateTime(
+  pdt0: PlainDateTime,
+  dur: DurationFields,
+  options: OverflowOptions | undefined,
+): PlainDateTime {
+  const isoFields = translateDateTime(pdt0.getISOFields(), dur, options)
+  return createDateTime({
+    ...isoFields,
+    calendar: pdt0.calendar,
+  })
+}
+
+function diffPlainDateTimes(
+  pdt0: PlainDateTime,
+  pdt1: PlainDateTime,
+  flip: boolean,
+  options: DiffOptions | undefined,
+): Duration {
+  const diffConfig = parseDiffOptions<Unit, UnitInt>(
+    options,
+    DAY, // largestUnitDefault
+    NANOSECOND, // smallestUnitDefault
+    NANOSECOND, // minUnit
+    YEAR, // maxUnit
+  )
+
+  return createDuration(
+    diffDateTimes(pdt0, pdt1, getCommonCalendar(pdt0, pdt1), flip, diffConfig),
+  )
+}

src/public/plainMonthDay.ts

@@ -1,12 +0,13 @@
-import { extractCalendar } from '../argParse/calendar'
 import { parseCalendarDisplayOption } from '../argParse/calendarDisplay'
 import { OVERFLOW_REJECT, parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
 import { isoCalendarID } from '../calendarImpl/isoCalendarImpl'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
-import { constrainDateISO } from '../dateUtils/date'
+import { compareDateTimes } from '../dateUtils/compare'
+import { constrainDateISO } from '../dateUtils/constrain'
+import { isoEpochLeapYear } from '../dateUtils/epoch'
+import { processMonthDayFromFields, processMonthDayWithFields } from '../dateUtils/fromAndWith'
 import { formatCalendarID, formatDateISO, formatMonthDayISO } from '../dateUtils/isoFormat'
-import { isoEpochLeapYear } from '../dateUtils/isoMath'
 import {
   MonthDayCalendarFields,
+  attachStringTag,
   mixinCalendarFields,
@@ -16,9 +17,2 @@ mixinISOFields,
 } from '../dateUtils/mixins'
-import {
-  MonthDayFields,
-  createMonthDay,
-  monthDayFieldMap,
-  monthDaysEqual,
-  overrideMonthDayFields,
-} from '../dateUtils/monthDay'
 import { parseMonthDay } from '../dateUtils/parse'
@@ -30,11 +24,8 @@ import { refineBaseObj } from '../dateUtils/parseRefine'
 } from '../native/intlUtils'
-import { throwNew } from '../utils/obj'
 import { Calendar, createDefaultCalendar } from './calendar'
 import { PlainDate } from './plainDate'
 import {
-  CalendarProtocol,
   DateISOFields,
   DateToStringOptions,
   MonthDayArg,
-  MonthDayLikeFields,
   MonthDayOverrides,
@@ -48,13 +39,7 @@ OverflowOptions,
     isoDay: number,
-    calendar: CalendarProtocol = createDefaultCalendar(),
-    referenceISOYear?: number,
+    calendar: Calendar = createDefaultCalendar(), // TODO: change back to CalendarProtocol
+    referenceISOYear: number = isoEpochLeapYear,
   ) {
-    const isoYear: number = referenceISOYear ??
-      (calendar.id === isoCalendarID
-        ? isoEpochLeapYear
-        : throwNew(Error, 'Must specify referenceYear')
-      )
-
     super({
-      ...constrainDateISO({ isoYear, isoMonth, isoDay }, OVERFLOW_REJECT),
+      ...constrainDateISO({ isoYear: referenceISOYear, isoMonth, isoDay }, OVERFLOW_REJECT),
       calendar,
@@ -72,11 +57,3 @@ })
     if (typeof arg === 'object') {
-      const calendar = extractCalendar(arg)
-      let refinedFields = refineFields(arg, monthDayFieldMap) as Partial<MonthDayFields>
-
-      // be nice and guess year if no calendar specified
-      if (refinedFields.year === undefined && arg.calendar === undefined) {
-        refinedFields = { ...refinedFields, year: isoEpochLeapYear }
-      }
-
-      return calendar.monthDayFromFields(refinedFields as MonthDayLikeFields, options)
+      return processMonthDayFromFields(arg, options)
     }
@@ -88,2 +65,3 @@
     // for strings, force ISO year if no calendar specified
+    // TODO: more DRY with processMonthDayLike?
     if (parsed.calendar === undefined) {
@@ -97,9 +75,7 @@ parsed.isoYear = isoEpochLeapYear
   with(fields: MonthDayOverrides, options?: OverflowOptions): PlainMonthDay {
-    const refinedFields = refineOverrideFields(fields, monthDayFieldMap)
-    const mergedFields = overrideMonthDayFields(refinedFields, this)
-    return this.calendar.monthDayFromFields(mergedFields, options)
+    return processMonthDayWithFields(this, fields, options)
   }
 
   equals(other: MonthDayArg): boolean {
-    return monthDaysEqual(this, ensureObj(PlainMonthDay, other))
+    return !compareDateTimes(this, ensureObj(PlainMonthDay, other))
   }
@@ -109,3 +85,3 @@
     const fields = this.getISOFields()
-    const calendarID = fields.calendar.id
+    const calendarID = fields.calendar.toString() // see note in formatCalendarID
     const calendarDisplay = parseCalendarDisplayOption(options)
@@ -120,3 +96,3 @@
 
-  toPlainDate(fields: { year: number }, options?: OverflowOptions): PlainDate {
+  toPlainDate(fields: { year: number }): PlainDate {
     return this.calendar.dateFromFields({
@@ -126,3 +102,5 @@ year: fields.year,
       day: this.day,
-    }, options)
+    }, {
+      overflow: 'reject', // always reject
+    })
   }
@@ -134,2 +112,3 @@ }
 export interface PlainMonthDay extends ToLocaleStringMethods {}
+attachStringTag(PlainMonthDay, 'PlainMonthDay')
 mixinISOFields(PlainMonthDay)
@@ -147,1 +126,11 @@ mixinCalendarFields(PlainMonthDay, monthDayCalendarFields)
 }, true)) // strictCalendar
+
+// create
+export function createMonthDay(isoFields: DateISOFields): PlainMonthDay {
+  return new PlainMonthDay(
+    isoFields.isoMonth,
+    isoFields.isoDay,
+    isoFields.calendar,
+    isoFields.isoYear,
+  )
+}

src/public/plainTime.ts

@@ -1,25 +0,20 @@
-import { timeFieldMap } from '../argParse/fieldStr'
+import { parseDiffOptions } from '../argParse/diffOptions'
 import { parseTimeToStringOptions } from '../argParse/isoFormatOptions'
 import { OVERFLOW_REJECT, parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
+import { parseRoundingOptions } from '../argParse/roundingOptions'
 import { timeUnitNames } from '../argParse/unitStr'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
+import { compareTimes } from '../dateUtils/compare'
+import { constrainTimeISO } from '../dateUtils/constrain'
+import { isoTimeToNano } from '../dateUtils/dayAndTime'
+import { diffTimes } from '../dateUtils/diff'
+import { negateDuration } from '../dateUtils/durationFields'
+import { processTimeFromFields, processTimeWithFields } from '../dateUtils/fromAndWith'
 import { formatTimeISO } from '../dateUtils/isoFormat'
-import { mixinISOFields } from '../dateUtils/mixins'
+import { attachStringTag, mixinISOFields } from '../dateUtils/mixins'
 import { parseTime } from '../dateUtils/parse'
 import { roundTime } from '../dateUtils/rounding'
-import {
-  TimeFields,
-  addToPlainTime,
-  compareTimes,
-  constrainTimeISO,
-  createTime,
-  diffPlainTimes,
-  overrideTimeFields,
-  roundPlainTime,
-  timeFieldsToConstrainedISO,
-  timeFieldsToNano,
-  timeLikeToISO,
-} from '../dateUtils/time'
-import { nanoInMilliBI } from '../dateUtils/units'
+import { translateTime } from '../dateUtils/translate'
+import { DurationFields, ISOTimeFields, LocalTimeFields } from '../dateUtils/typesPrivate'
+import { HOUR, NANOSECOND, TimeUnitInt, nanoInMilli } from '../dateUtils/units'
 import { FormatFactory } from '../native/intlFactory'
@@ -29,5 +24,6 @@ import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
 import { Calendar, createDefaultCalendar } from './calendar'
-import { Duration } from './duration'
+import { Duration, createDuration } from './duration'
 import { PlainDate } from './plainDate'
 import { PlainDateTime } from './plainDateTime'
+import { TimeZone } from './timeZone'
 import {
@@ -44,5 +40,6 @@ CompareResult,
   TimeToStringOptions,
+  TimeUnit,
   TimeZoneArg,
 } from './types'
-import { ZonedDateTime } from './zonedDateTime'
+import { ZonedDateTime, createZonedDateTimeFromFields } from './zonedDateTime'
 
@@ -80,3 +77,3 @@ export class PlainTime extends AbstractISOObj<TimeISOFields> {
         : typeof arg === 'object'
-          ? timeFieldsToConstrainedISO(refineFields(arg, timeFieldMap), overflowHandling)
+          ? processTimeFromFields(arg, overflowHandling)
           : parseTime(String(arg)),
@@ -91,6 +88,4 @@ )
   with(fields: TimeLike, options?: OverflowOptions): PlainTime {
-    const refinedFields = refineOverrideFields(fields, timeFieldMap)
-    const mergedFields = overrideTimeFields(refinedFields, this)
     return createTime(
-      timeFieldsToConstrainedISO(mergedFields, parseOverflowOption(options)),
+      processTimeWithFields(this, fields, parseOverflowOption(options)),
     )
@@ -100,7 +95,7 @@ }
   add(durationArg: DurationArg): PlainTime {
-    return addToPlainTime(this, ensureObj(Duration, durationArg))
+    return translatePlainTime(this, ensureObj(Duration, durationArg))
   }
 
   subtract(durationArg: DurationArg): PlainTime {
-    return addToPlainTime(this, ensureObj(Duration, durationArg).negated())
+    return translatePlainTime(this, negateDuration(ensureObj(Duration, durationArg)))
   }
@@ -116,8 +111,15 @@
 
-  round(options: TimeRoundingOptions): PlainTime {
-    return roundPlainTime(this, options)
+  round(options: TimeRoundingOptions | TimeUnit): PlainTime {
+    const roundingConfig = parseRoundingOptions<TimeUnit, TimeUnitInt>(
+      options,
+      undefined, // no default. required
+      NANOSECOND, // minUnit
+      HOUR, // maxUnit
+    )
+
+    return createTime(roundTime(this.getISOFields(), roundingConfig))
   }
 
   equals(other: TimeArg): boolean {
-    return compareTimes(this, ensureObj(PlainTime, other)) === 0
+    return !compareTimes(this, ensureObj(PlainTime, other))
   }
@@ -127,12 +129,16 @@
     const formatConfig = parseTimeToStringOptions(options)
-    const roundedISOFields = roundTime(
-      this,
-      formatConfig.roundingIncrement,
-      formatConfig.roundingMode,
-    )
-    return formatTimeISO(timeLikeToISO(roundedISOFields), formatConfig)
+    const roundedISOFields: ISOTimeFields = roundTime(this.getISOFields(), formatConfig)
+    return formatTimeISO(roundedISOFields, formatConfig)
   }
 
   toZonedDateTime(options: { plainDate: DateArg, timeZone: TimeZoneArg }): ZonedDateTime {
-    return this.toPlainDateTime(options.plainDate).toZonedDateTime(options.timeZone)
+    // TODO: ensure options object first?
+    const plainDate = ensureObj(PlainDate, options.plainDate)
+    const timeZone = ensureObj(TimeZone, options.timeZone)
+
+    return createZonedDateTimeFromFields({
+      ...plainDate.getISOFields(),
+      ...this.getISOFields(),
+      timeZone,
+    })
   }
@@ -146,4 +152,5 @@
 // mixin
-export interface PlainTime extends TimeFields { calendar: Calendar }
+export interface PlainTime extends LocalTimeFields { calendar: Calendar }
 export interface PlainTime extends ToLocaleStringMethods {}
+attachStringTag(PlainTime, 'PlainTime')
 mixinISOFields(PlainTime, timeUnitNames)
@@ -171,5 +178,45 @@ mixinLocaleStringMethods(PlainTime, createPlainTimeFormatFactory)
     buildEpochMilli: (plainTime: PlainTime) => (
-      Number(timeFieldsToNano(plainTime) / nanoInMilliBI)
+      Math.trunc(isoTimeToNano(plainTime.getISOFields()) / nanoInMilli)
     ),
   }
 }
+
+export function createTime(isoFields: ISOTimeFields): PlainTime {
+  return new PlainTime(
+    isoFields.isoHour,
+    isoFields.isoMinute,
+    isoFields.isoSecond,
+    isoFields.isoMillisecond,
+    isoFields.isoMicrosecond,
+    isoFields.isoNanosecond,
+  )
+}
+
+// Normally ensureObj and ::from would fail when undefined is specified
+// Fallback to 00:00 time
+export function ensureLooseTime(arg: TimeArg | undefined): PlainTime {
+  return ensureObj(PlainTime, arg ?? { hour: 0 })
+}
+
+function translatePlainTime(pt: PlainTime, dur: DurationFields): PlainTime {
+  return createTime(translateTime(pt.getISOFields(), dur))
+}
+
+function diffPlainTimes(
+  pt0: PlainTime,
+  pt1: PlainTime,
+  options: TimeDiffOptions | undefined,
+): Duration {
+  const diffConfig = parseDiffOptions<TimeUnit, TimeUnitInt>(
+    options,
+    HOUR, // largestUnitDefault
+    NANOSECOND, // smallestUnitDefault
+    NANOSECOND, // minUnit
+    HOUR, // maxUnit
+  )
+
+  return createDuration(
+    // TODO: use local-time-fields as-is somehow???
+    diffTimes(pt0.getISOFields(), pt1.getISOFields(), diffConfig),
+  )
+}

src/public/plainYearMonth.ts

@@ -1,10 +0,12 @@
-import { extractCalendar } from '../argParse/calendar'
+import { getCommonCalendar } from '../argParse/calendar'
 import { parseCalendarDisplayOption } from '../argParse/calendarDisplay'
 import { parseDiffOptions } from '../argParse/diffOptions'
-import { yearMonthFieldMap } from '../argParse/fieldStr'
 import { OVERFLOW_REJECT, parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
 import { isoCalendarID } from '../calendarImpl/isoCalendarImpl'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
-import { constrainDateISO, diffDates } from '../dateUtils/date'
+import { compareDateTimes } from '../dateUtils/compare'
+import { constrainDateISO } from '../dateUtils/constrain'
+import { diffDates } from '../dateUtils/diff'
+import { negateDuration } from '../dateUtils/durationFields'
+import { processYearMonthFromFields, processYearMonthWithFields } from '../dateUtils/fromAndWith'
 import { validateYearMonth } from '../dateUtils/isoFieldValidation'
@@ -14,2 +16,3 @@ import { formatCalendarID, formatDateISO, formatYearMonthISO } from '../dateUtils/isoFormat'
   YearMonthCalendarFields,
+  attachStringTag,
   mixinCalendarFields,
@@ -21,12 +24,8 @@ mixinISOFields,
 import { refineBaseObj } from '../dateUtils/parseRefine'
+import { DurationFields } from '../dateUtils/typesPrivate'
 import { MONTH, YEAR, YearMonthUnitInt } from '../dateUtils/units'
-import {
-  comparePlainYearMonths,
-  createYearMonth,
-  overrideYearMonthFields,
-} from '../dateUtils/yearMonth'
 import { createPlainFormatFactoryFactory } from '../native/intlFactory'
 import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
 import { Calendar, createDefaultCalendar } from './calendar'
-import { Duration } from './duration'
+import { Duration, createDuration } from './duration'
 import { PlainDate } from './plainDate'
@@ -42,3 +41,2 @@ import {
   YearMonthDiffOptions,
-  YearMonthLikeFields,
   YearMonthOverrides,
@@ -80,4 +78,3 @@ YearMonthUnit,
     if (typeof arg === 'object') {
-      const refinedFields = refineFields(arg, yearMonthFieldMap) as YearMonthLikeFields
-      return extractCalendar(arg).yearMonthFromFields(refinedFields, options)
+      return processYearMonthFromFields(arg, options)
     }
@@ -97,3 +94,3 @@
   static compare(a: YearMonthArg, b: YearMonthArg): CompareResult {
-    return comparePlainYearMonths(
+    return compareDateTimes(
       ensureObj(PlainYearMonth, a),
@@ -105,36 +102,23 @@ ensureObj(PlainYearMonth, b),
   with(fields: YearMonthOverrides, options?: OverflowOptions): PlainYearMonth {
-    const refinedFields = refineOverrideFields(fields, yearMonthFieldMap)
-    return this.calendar.yearMonthFromFields(
-      overrideYearMonthFields(refinedFields, this),
-      options,
-    )
+    return processYearMonthWithFields(this, fields, options)
   }
 
   add(durationArg: DurationArg, options?: OverflowOptions): PlainYearMonth {
-    return addDuration(this, ensureObj(Duration, durationArg), options)
+    return translatePlainYearMonth(this, ensureObj(Duration, durationArg), options)
   }
 
   subtract(durationArg: DurationArg, options?: OverflowOptions): PlainYearMonth {
-    return addDuration(this, ensureObj(Duration, durationArg).negated(), options)
+    return translatePlainYearMonth(this, negateDuration(ensureObj(Duration, durationArg)), options)
   }
 
   until(other: YearMonthArg, options?: YearMonthDiffOptions): Duration {
-    return diffDates(
-      this.toPlainDate(day1),
-      ensureObj(PlainYearMonth, other).toPlainDate(day1),
-      parseDiffOptions<YearMonthUnit, YearMonthUnitInt>(options, YEAR, MONTH, MONTH, YEAR),
-    )
+    return diffPlainYearMonths(this, ensureObj(PlainYearMonth, other), false, options)
   }
 
   since(other: YearMonthArg, options?: YearMonthDiffOptions): Duration {
-    return diffDates(
-      this.toPlainDate(day1),
-      ensureObj(PlainYearMonth, other).toPlainDate(day1),
-      parseDiffOptions<YearMonthUnit, YearMonthUnitInt>(options, YEAR, MONTH, MONTH, YEAR),
-      true,
-    )
+    return diffPlainYearMonths(this, ensureObj(PlainYearMonth, other), true, options)
   }
 
   equals(other: YearMonthArg): boolean {
-    return comparePlainYearMonths(this, ensureObj(PlainYearMonth, other)) === 0
+    return !compareDateTimes(this, ensureObj(PlainYearMonth, other))
   }
@@ -144,3 +128,3 @@
     const fields = this.getISOFields()
-    const calendarID = fields.calendar.id
+    const calendarID = fields.calendar.toString() // see note in formatCalendarID
     const calendarDisplay = parseCalendarDisplayOption(options)
@@ -167,2 +151,3 @@
 export interface PlainYearMonth extends ToLocaleStringMethods {}
+attachStringTag(PlainYearMonth, 'PlainYearMonth')
 mixinISOFields(PlainYearMonth)
@@ -181,7 +166,14 @@ mixinCalendarFields(PlainYearMonth, yearMonthCalendarFields)
 
-// utils
+export function createYearMonth(isoFields: DateISOFields): PlainYearMonth {
+  return new PlainYearMonth(
+    isoFields.isoYear,
+    isoFields.isoMonth,
+    isoFields.calendar,
+    isoFields.isoDay,
+  )
+}
 
-function addDuration(
+function translatePlainYearMonth(
   yearMonth: PlainYearMonth,
-  duration: Duration,
+  duration: DurationFields,
   options?: OverflowOptions,
@@ -197,1 +189,18 @@ ): PlainYearMonth {
 }
+
+function diffPlainYearMonths(
+  pym0: PlainYearMonth,
+  pym1: PlainYearMonth,
+  flip: boolean,
+  options: YearMonthDiffOptions | undefined,
+): Duration {
+  return createDuration(
+    diffDates(
+      pym0.toPlainDate(day1),
+      pym1.toPlainDate(day1),
+      getCommonCalendar(pym0, pym1),
+      flip,
+      parseDiffOptions<YearMonthUnit, YearMonthUnitInt>(options, YEAR, MONTH, MONTH, YEAR),
+    ),
+  )
+}

src/public/timeZone.ts

@@ -7,17 +7,10 @@ import {
 } from '../argParse/disambig'
-import { OFFSET_REJECT } from '../argParse/offsetHandling'
 import { isTimeZoneArgBag, parseTimeZoneFromBag } from '../argParse/timeZone'
 import { AbstractObj, ensureObj } from '../dateUtils/abstract'
-import { createDateTime } from '../dateUtils/dateTime'
+import { epochNanoToISOFields, isoFieldsToEpochNano } from '../dateUtils/epoch'
 import { formatOffsetISO } from '../dateUtils/isoFormat'
-import { epochNanoToISOFields, isoFieldsToEpochSecs } from '../dateUtils/isoMath'
+import { attachStringTag } from '../dateUtils/mixins'
+import { checkInvalidOffset } from '../dateUtils/offset'
 import { tryParseZonedDateTime } from '../dateUtils/parse'
 import { refineZonedObj } from '../dateUtils/parseRefine'
-import {
-  nanoInMicroBI,
-  nanoInMilliBI,
-  nanoInSecond,
-  nanoInSecondBI,
-} from '../dateUtils/units'
-import { computeEpochNanoViaOffset } from '../dateUtils/zonedDateTime'
 import { TimeZoneImpl } from '../timeZoneImpl/timeZoneImpl'
@@ -28,3 +21,3 @@ import { queryTimeZoneImpl } from '../timeZoneImpl/timeZoneImplQuery'
 import { Instant } from './instant'
-import { PlainDateTime } from './plainDateTime'
+import { PlainDateTime, createDateTime } from './plainDateTime'
 import {
@@ -64,8 +57,8 @@ CalendarArg,
         const refined = refineZonedObj(parsed) // TODO: we don't need the calendar
-        computeEpochNanoViaOffset(refined, OFFSET_REJECT) // throws error if offset/tz inconsistent
+        checkInvalidOffset(refined)
         return refined.timeZone
       } else if (parsed.Z) {
         return new TimeZone('UTC')
-      } else if (parsed.offset !== undefined) {
-        return new TimeZone(formatOffsetISO(parsed.offset))
+      } else if (parsed.offsetNanoseconds !== undefined) {
+        return new TimeZone(formatOffsetISO(parsed.offsetNanoseconds))
       }
@@ -77,3 +70,5 @@ }
 
-  get id(): string { return getImpl(this).id }
+  get id(): string {
+    return this.toString()
+  }
 
@@ -86,3 +81,3 @@ getOffsetStringFor(instantArg: InstantArg): string {
     const instant = ensureObj(Instant, instantArg)
-    return getImpl(this).getOffset(instant.epochSeconds) * nanoInSecond
+    return getImpl(this).getOffset(instant.epochNanoseconds)
   }
@@ -107,19 +102,19 @@
     const isoFields = ensureObj(PlainDateTime, dateTimeArg).getISOFields()
-    const zoneSecs = isoFieldsToEpochSecs(isoFields)
-    const possibleOffsetSecs = getImpl(this).getPossibleOffsets(zoneSecs)
-    let offsetSecs: number
+    const zoneNano = isoFieldsToEpochNano(isoFields)
+    const possibleOffsetNanos = getImpl(this).getPossibleOffsets(zoneNano)
+    let offsetNano: number
 
-    if (possibleOffsetSecs.length === 1 || disambig === DISAMBIG_COMPATIBLE) {
-      offsetSecs = possibleOffsetSecs[0]
+    if (possibleOffsetNanos.length === 1 || disambig === DISAMBIG_COMPATIBLE) {
+      offsetNano = possibleOffsetNanos[0]
     } else if (disambig === DISAMBIG_REJECT) {
       throw new RangeError('Ambiguous offset')
     } else {
-      offsetSecs = Math[
+      offsetNano = Math[
         disambig === DISAMBIG_EARLIER
-          ? 'max' // (results in an earlier epochNano, because offsetSecs is subtracted)
+          ? 'max' // (results in an earlier epochNano, because offsetNano is subtracted)
           : 'min' // DISAMBIG_LATER
-      ](...(possibleOffsetSecs as [number, number]))
+      ](...(possibleOffsetNanos as [number, number]))
     }
 
-    return epochSecsToInstant(zoneSecs - offsetSecs, isoFields)
+    return new Instant(zoneNano - BigInt(offsetNano))
   }
@@ -129,4 +124,4 @@
     const isoFields = ensureObj(PlainDateTime, dateTimeArg).getISOFields()
-    const zoneSecs = isoFieldsToEpochSecs(isoFields)
-    let possibleOffsetSecs = getImpl(this).getPossibleOffsets(zoneSecs)
+    const zoneNano = isoFieldsToEpochNano(isoFields)
+    let possibleOffsetNanos = getImpl(this).getPossibleOffsets(zoneNano)
 
@@ -136,10 +131,10 @@ // A forward transition looses an hour.
     if (
-      possibleOffsetSecs.length === 2 &&
-      possibleOffsetSecs[0] < possibleOffsetSecs[1]
+      possibleOffsetNanos.length === 2 &&
+      possibleOffsetNanos[0] < possibleOffsetNanos[1]
     ) {
-      possibleOffsetSecs = []
+      possibleOffsetNanos = []
     }
 
-    return possibleOffsetSecs.map((offsetSecs) => (
-      epochSecsToInstant(zoneSecs - offsetSecs, isoFields)
+    return possibleOffsetNanos.map((offsetNano) => (
+      new Instant(zoneNano - BigInt(offsetNano))
     ))
@@ -150,5 +145,5 @@ }
     const instant = ensureObj(Instant, instantArg)
-    const rawTransition = getImpl(this).getTransition(instant.epochSeconds, -1)
+    const rawTransition = getImpl(this).getTransition(instant.epochNanoseconds, -1)
     if (rawTransition) {
-      return epochSecsToInstant(rawTransition[0])
+      return new Instant(rawTransition[0])
     }
@@ -160,5 +155,5 @@ return null
     const instant = ensureObj(Instant, instantArg)
-    const rawTransition = getImpl(this).getTransition(instant.epochSeconds, 1)
+    const rawTransition = getImpl(this).getTransition(instant.epochNanoseconds, 1)
     if (rawTransition) {
-      return epochSecsToInstant(rawTransition[0])
+      return new Instant(rawTransition[0])
     }
@@ -168,19 +163,7 @@ return null
 
-  toString(): string { return this.id }
+  toString(): string {
+    return getImpl(this).id
+  }
 }
 
-function epochSecsToInstant(
-  epochSecs: number,
-  otherISOFields?: { isoMillisecond: number, isoMicrosecond: number, isoNanosecond: number },
-): Instant {
-  return new Instant(
-    BigInt(epochSecs) * nanoInSecondBI + (
-      otherISOFields
-        // TODO: use a common util for this?
-        ? BigInt(otherISOFields.isoMillisecond) * nanoInMilliBI +
-          BigInt(otherISOFields.isoMicrosecond) * nanoInMicroBI +
-          BigInt(otherISOFields.isoNanosecond)
-        : 0n
-    ),
-  )
-}
+attachStringTag(TimeZone, 'TimeZone')

src/public/types.ts

@@ -11,5 +11,9 @@ import { CalendarArgBag, CalendarArgSimple } from '../argParse/calendar'
 import { DateUnitProper, TimeUnitProper, YearMonthUnitProper } from '../argParse/unitStr'
-import { DateISOEssentials } from '../dateUtils/date'
-import { DurationFields } from '../dateUtils/duration'
-import { TimeFields, TimeISOEssentials } from '../dateUtils/time'
+import {
+  DurationFields,
+  ISODateFields,
+  ISOTimeFields,
+  LocalTimeFields,
+} from '../dateUtils/typesPrivate'
+import { Calendar } from './calendar'
 import { Duration } from './duration'
@@ -55,3 +59,3 @@ import { Instant } from './instant'
 export type RoundingMode = keyof RoundingModeMap
-export type RoundingOptions<UnitType extends Unit = Unit> = {
+export type RoundingOptions<UnitType extends DayTimeUnit = DayTimeUnit> = {
   smallestUnit: UnitType // required
@@ -61,4 +65,4 @@ roundingMode?: RoundingMode
 }
+export type DateTimeRoundingOptions = RoundingOptions // uuhhh
 export type TimeRoundingOptions = RoundingOptions<TimeUnit>
-export type DateTimeRoundingOptions = RoundingOptions<DayTimeUnit>
 // similar to diffing
@@ -107,6 +111,6 @@ export type DurationRoundingOptions = DiffOptions & { relativeTo?: ZonedDateTimeArg | DateTimeArg }
 
-// iso-fields
-export type DateISOFields = DateISOEssentials & { calendar: CalendarProtocol }
-export type TimeISOFields = TimeISOEssentials & { calendar: CalendarProtocol }
-export type DateTimeISOFields = DateISOFields & TimeISOEssentials
+// iso-fields (TODO: change back to CalendarProtocol!!!)
+export type DateISOFields = ISODateFields & { calendar: Calendar }
+export type TimeISOFields = ISOTimeFields & { calendar: Calendar }
+export type DateTimeISOFields = DateISOFields & ISOTimeFields
 export type ZonedDateTimeISOFields = DateTimeISOFields & { timeZone: TimeZone, offset: string }
@@ -123,3 +127,3 @@
 export type DateLikeFields = YearMonthLikeFields & { day: number }
-export type DateTimeLikeFields = DateLikeFields & Partial<TimeFields>
+export type DateTimeLikeFields = DateLikeFields & Partial<LocalTimeFields>
 export type ZonedDateTimeLikeFields = DateTimeLikeFields & { offset?: string }
@@ -135,3 +139,3 @@
 export type DateLike = YearMonthLike & { day: number }
-export type TimeLike = Partial<TimeFields>
+export type TimeLike = Partial<LocalTimeFields>
 export type DateTimeLike = DateLike & TimeLike
@@ -138,0 +142,0 @@ export type ZonedDateTimeLike = DateTimeLike & { timeZone: TimeZoneArgSimple, offset?: string }

src/public/zonedDateTime.ts

@@ -1,22 +0,38 @@
-import { extractCalendar, getStrangerCalendar } from '../argParse/calendar'
+import { getCommonCalendar, getStrangerCalendar } from '../argParse/calendar'
 import { parseCalendarDisplayOption } from '../argParse/calendarDisplay'
+import { parseDiffOptions } from '../argParse/diffOptions'
 import { parseDisambigOption } from '../argParse/disambig'
-import { zonedDateTimeFieldMap } from '../argParse/fieldStr'
 import { parseTimeToStringOptions } from '../argParse/isoFormatOptions'
 import { OFFSET_DISPLAY_AUTO, parseOffsetDisplayOption } from '../argParse/offsetDisplay'
-import { OFFSET_PREFER, OFFSET_REJECT, parseOffsetHandlingOption } from '../argParse/offsetHandling'
+import {
+  OFFSET_PREFER,
+  OFFSET_REJECT,
+  OffsetHandlingInt,
+  parseOffsetHandlingOption,
+} from '../argParse/offsetHandling'
 import { parseOverflowOption } from '../argParse/overflowHandling'
-import { refineFields, refineOverrideFields } from '../argParse/refine'
-import { extractTimeZone } from '../argParse/timeZone'
+import { RoundingConfig, parseRoundingOptions } from '../argParse/roundingOptions'
 import { parseTimeZoneDisplayOption } from '../argParse/timeZoneDisplay'
 import { timeUnitNames } from '../argParse/unitStr'
 import { AbstractISOObj, ensureObj } from '../dateUtils/abstract'
-import { createDate } from '../dateUtils/date'
-import { createDateTime } from '../dateUtils/dateTime'
+import { compareEpochObjs, zonedDateTimesEqual } from '../dateUtils/compare'
+import { zeroISOTimeFields } from '../dateUtils/dayAndTime'
+import { diffDateTimes } from '../dateUtils/diff'
+import { negateDuration } from '../dateUtils/durationFields'
+import { epochNanoToISOFields } from '../dateUtils/epoch'
+import {
+  processZonedDateTimeFromFields,
+  processZonedDateTimeWithFields,
+} from '../dateUtils/fromAndWith'
 import { validateDateTime } from '../dateUtils/isoFieldValidation'
-import { formatCalendarID, formatDateTimeISO, formatTimeZoneID } from '../dateUtils/isoFormat'
-import { epochNanoToISOFields } from '../dateUtils/isoMath'
 import {
+  formatCalendarID,
+  formatDateTimeISO,
+  formatOffsetISO,
+  formatTimeZoneID,
+} from '../dateUtils/isoFormat'
+import {
   ComputedEpochFields,
   DateCalendarFields,
+  attachStringTag,
   dateCalendarFields,
@@ -27,30 +43,33 @@ mixinCalendarFields,
 } from '../dateUtils/mixins'
+import {
+  OffsetComputableFields,
+  computeNanoInDay,
+  computeZonedDateTimeEpochNano,
+} from '../dateUtils/offset'
 import { parseZonedDateTime } from '../dateUtils/parse'
 import { refineZonedObj } from '../dateUtils/parseRefine'
-import { TimeFields, createTime } from '../dateUtils/time'
-import { nanoInHour } from '../dateUtils/units'
-import { createYearMonth } from '../dateUtils/yearMonth'
+import { roundZonedDateTimeFields } from '../dateUtils/rounding'
+import { translateZonedDateTimeFields } from '../dateUtils/translate'
+import { DurationFields, ISODateTimeFields, LocalTimeFields } from '../dateUtils/typesPrivate'
 import {
-  addToZonedDateTime,
-  computeNanoInDay,
-  createZonedDateTime,
-  diffZonedDateTimes,
-  overrideZonedDateTimeFields,
-  roundZonedDateTime,
-  roundZonedDateTimeWithOptions,
-  zeroTimeISOFields,
-  zonedDateTimeFieldsToISO,
-} from '../dateUtils/zonedDateTime'
+  DAY,
+  DayTimeUnitInt,
+  HOUR,
+  NANOSECOND,
+  UnitInt,
+  YEAR,
+  nanoInHour,
+} from '../dateUtils/units'
 import { createZonedFormatFactoryFactory } from '../native/intlFactory'
 import { ToLocaleStringMethods, mixinLocaleStringMethods } from '../native/intlMixins'
-import { compareValues } from '../utils/math'
+import { roundToMinute } from '../utils/math'
 import { createWeakMap } from '../utils/obj'
 import { Calendar, createDefaultCalendar } from './calendar'
-import { Duration } from './duration'
+import { Duration, createDuration } from './duration'
 import { Instant } from './instant'
-import { PlainDate } from './plainDate'
-import { PlainDateTime } from './plainDateTime'
+import { PlainDate, createDate } from './plainDate'
+import { PlainDateTime, createDateTime } from './plainDateTime'
 import { PlainMonthDay } from './plainMonthDay'
-import { PlainTime } from './plainTime'
-import { PlainYearMonth } from './plainYearMonth'
+import { PlainTime, createTime } from './plainTime'
+import { PlainYearMonth, createYearMonth } from './plainYearMonth'
 import { TimeZone } from './timeZone'
@@ -62,2 +81,3 @@ import {
   DateTimeRoundingOptions,
+  DayTimeUnit,
   DiffOptions,
@@ -68,5 +88,5 @@ DurationArg,
   TimeZoneArg,
+  Unit,
   ZonedDateTimeArg,
   ZonedDateTimeISOFields,
-  ZonedDateTimeLikeFields,
   ZonedDateTimeOptions,
@@ -93,6 +113,4 @@ ZonedDateTimeOverrides,
     const calendar = ensureObj(Calendar, calendarArg)
-    const instant = new Instant(epochNanoseconds) // will do validation
-    const offsetNanoseconds = timeZone.getOffsetNanosecondsFor(instant)
-    const isoFields = epochNanoToISOFields(epochNanoseconds + BigInt(offsetNanoseconds))
 
+    const [isoFields, offsetNano] = buildZonedDateTimeISOFields(epochNanoseconds, timeZone)
     validateDateTime(isoFields, calendar.id)
@@ -104,3 +122,5 @@
       timeZone,
-      offset: timeZone.getOffsetStringFor(instant),
+      // NOTE: must support TimeZone protocols that don't implement getOffsetStringFor
+      // TODO: more DRY with getOffsetStringFor
+      offset: formatOffsetISO(offsetNano),
     })
@@ -110,3 +130,3 @@
       epochNanoseconds,
-      offsetNanoseconds,
+      offsetNanoseconds: offsetNano,
     })
@@ -119,19 +139,16 @@ }
 
-    return createZonedDateTime(
-      arg instanceof ZonedDateTime
-        ? { // optimization
-            ...arg.getISOFields(),
-            offset: arg.offsetNanoseconds,
-          }
-        : typeof arg === 'object'
-          ? zonedDateTimeFieldsToISO(
-            refineFields(arg, zonedDateTimeFieldMap) as ZonedDateTimeLikeFields,
-            options,
-            overflowHandling,
-            extractCalendar(arg),
-            extractTimeZone(arg),
-          )
-          : refineZonedObj(parseZonedDateTime(String(arg))),
+    if (arg instanceof ZonedDateTime) {
+      return new ZonedDateTime(arg.epochNanoseconds, arg.timeZone, arg.calendar)
+    }
+
+    const isObject = typeof arg === 'object'
+    const fields = isObject
+      ? processZonedDateTimeFromFields(arg, overflowHandling, options)
+      : refineZonedObj(parseZonedDateTime(String(arg)))
+
+    return createZonedDateTimeFromFields(
+      fields,
+      !isObject, // fuzzyMatching (if string)
+      offsetHandling,
       options,
-      offsetHandling,
     )
@@ -141,5 +158,5 @@ }
   static compare(a: ZonedDateTimeArg, b: ZonedDateTimeArg): CompareResult {
-    return compareValues(
-      ensureObj(ZonedDateTime, a).epochNanoseconds,
-      ensureObj(ZonedDateTime, b).epochNanoseconds,
+    return compareEpochObjs(
+      ensureObj(ZonedDateTime, a),
+      ensureObj(ZonedDateTime, b),
     )
@@ -154,19 +171,8 @@ }
   with(fields: ZonedDateTimeOverrides, options?: ZonedDateTimeOptions): ZonedDateTime {
-    const refinedFields = refineOverrideFields(fields, zonedDateTimeFieldMap)
-    const mergedFields = overrideZonedDateTimeFields(refinedFields, this)
+    parseDisambigOption(options) // for validation
+    const overflowHandling = parseOverflowOption(options) // for validation (?)
     const offsetHandling = parseOffsetHandlingOption(options, OFFSET_PREFER)
-    const overflowHandling = parseOverflowOption(options)
-    parseDisambigOption(options) // for validation
+    const refined = processZonedDateTimeWithFields(this, fields, overflowHandling, options)
 
-    return createZonedDateTime(
-      zonedDateTimeFieldsToISO(
-        mergedFields,
-        options,
-        overflowHandling,
-        this.calendar,
-        this.timeZone,
-      ),
-      options,
-      offsetHandling,
-    )
+    return createZonedDateTimeFromFields(refined, false, offsetHandling, options)
   }
@@ -188,5 +194,9 @@
   withPlainTime(timeArg?: TimeArg): ZonedDateTime {
-    return this.toPlainDate().toZonedDateTime({
-      plainTime: timeArg,
-      timeZone: this.timeZone,
+    return createZonedDateTimeFromFields({
+      ...this.getISOFields(),
+      ...(
+        timeArg === undefined
+          ? zeroISOTimeFields
+          : ensureObj(PlainTime, timeArg).getISOFields()
+      ),
     })
@@ -212,39 +222,38 @@ }
   add(durationArg: DurationArg, options?: OverflowOptions): ZonedDateTime {
-    return addToZonedDateTime(this, ensureObj(Duration, durationArg), options)
+    return translateZonedDateTime(this, ensureObj(Duration, durationArg), options)
   }
 
   subtract(durationArg: DurationArg, options?: OverflowOptions): ZonedDateTime {
-    return addToZonedDateTime(this, ensureObj(Duration, durationArg).negated(), options)
+    return translateZonedDateTime(this, negateDuration(ensureObj(Duration, durationArg)), options)
   }
 
   until(other: ZonedDateTimeArg, options?: DiffOptions): Duration {
-    return diffZonedDateTimes(this, ensureObj(ZonedDateTime, other), options)
+    return diffZonedDateTimes(this, ensureObj(ZonedDateTime, other), false, options)
   }
 
   since(other: ZonedDateTimeArg, options?: DiffOptions): Duration {
-    return diffZonedDateTimes(this, ensureObj(ZonedDateTime, other), options, true)
+    return diffZonedDateTimes(this, ensureObj(ZonedDateTime, other), true, options)
   }
 
-  round(options?: DateTimeRoundingOptions): ZonedDateTime {
-    return roundZonedDateTimeWithOptions(this, options)
+  round(options?: DateTimeRoundingOptions | DayTimeUnit): ZonedDateTime {
+    const roundingConfig = parseRoundingOptions<DayTimeUnit, DayTimeUnitInt>(
+      options,
+      undefined, // no default. will error-out if unset
+      NANOSECOND, // minUnit
+      DAY, // maxUnit
+    )
+
+    return roundZonedDateTime(this, roundingConfig)
   }
 
   equals(other: ZonedDateTimeArg): boolean {
-    const otherZdt = ensureObj(ZonedDateTime, other)
-
-    return this.epochNanoseconds === otherZdt.epochNanoseconds &&
-      this.calendar.id === otherZdt.calendar.id &&
-      this.timeZone.id === otherZdt.timeZone.id
+    return zonedDateTimesEqual(this, ensureObj(ZonedDateTime, other))
   }
 
   startOfDay(): ZonedDateTime {
-    return createZonedDateTime( // TODO: more DRY with computeNanoInDay
-      {
-        ...this.getISOFields(),
-        ...zeroTimeISOFields,
-        offset: undefined,
-      },
-      undefined, // options
-      OFFSET_REJECT, // doesn't matter b/c no explicit offset given
-    )
+    return createZonedDateTimeFromFields({
+      ...this.getISOFields(),
+      ...zeroISOTimeFields,
+      offsetNanoseconds: this.offsetNanoseconds,
+    }, false, OFFSET_PREFER)
   }
@@ -254,3 +263,3 @@
   get hoursInDay(): number {
-    return computeNanoInDay(this) / nanoInHour
+    return computeNanoInDay(this.getISOFields()) / nanoInHour
   }
@@ -263,12 +272,11 @@
     const calendarDisplay = parseCalendarDisplayOption(options)
-    const isoFields = roundZonedDateTime(
-      this,
-      formatConfig.roundingIncrement,
-      formatConfig.roundingMode,
-    ).getISOFields()
+    const roundedZdt = roundZonedDateTime(this, formatConfig)
 
-    return formatDateTimeISO(isoFields, formatConfig) +
-      (offsetDisplay === OFFSET_DISPLAY_AUTO ? isoFields.offset : '') + // already formatted
-      formatTimeZoneID(isoFields.timeZone.id, timeZoneDisplay) +
-      formatCalendarID(isoFields.calendar.id, calendarDisplay)
+    return formatDateTimeISO(roundedZdt.getISOFields(), formatConfig) +
+      (offsetDisplay === OFFSET_DISPLAY_AUTO
+        ? formatOffsetISO(roundToMinute(roundedZdt.offsetNanoseconds))
+        : ''
+      ) +
+      formatTimeZoneID(this.timeZone.toString(), timeZoneDisplay) +
+      formatCalendarID(this.calendar.toString(), calendarDisplay)
   }
@@ -286,5 +294,6 @@
 export interface ZonedDateTime extends DateCalendarFields { calendar: Calendar }
-export interface ZonedDateTime extends TimeFields {}
+export interface ZonedDateTime extends LocalTimeFields {}
 export interface ZonedDateTime extends ComputedEpochFields {}
 export interface ZonedDateTime extends ToLocaleStringMethods {}
+attachStringTag(ZonedDateTime, 'ZonedDateTime')
 mixinISOFields(ZonedDateTime, timeUnitNames)
@@ -304,1 +313,70 @@ mixinCalendarFields(ZonedDateTime, dateCalendarFields)
 }, {}))
+
+export function createZonedDateTimeFromFields(
+  fields: OffsetComputableFields,
+  fuzzyMatching?: boolean,
+  offsetHandling?: OffsetHandlingInt,
+  disambigOptions?: ZonedDateTimeOptions, // TODO: more specific type
+): ZonedDateTime {
+  const epochNano = computeZonedDateTimeEpochNano(
+    fields,
+    fuzzyMatching,
+    offsetHandling,
+    disambigOptions,
+  )
+  return new ZonedDateTime(epochNano, fields.timeZone, fields.calendar)
+}
+
+export function buildZonedDateTimeISOFields(
+  epochNano: bigint,
+  timeZone: TimeZone,
+): [ISODateTimeFields, number] {
+  const instant = new Instant(epochNano) // will do validation
+  const offsetNano = timeZone.getOffsetNanosecondsFor(instant)
+  const isoFields = epochNanoToISOFields(epochNano + BigInt(offsetNano))
+  return [isoFields, offsetNano]
+}
+
+function translateZonedDateTime(
+  zdt: ZonedDateTime,
+  dur: DurationFields,
+  options: OverflowOptions | undefined,
+): ZonedDateTime {
+  const isoFields = zdt.getISOFields()
+  const epochNano = translateZonedDateTimeFields(isoFields, dur, options)
+  return new ZonedDateTime(epochNano, isoFields.timeZone, isoFields.calendar)
+}
+
+function roundZonedDateTime(
+  zdt: ZonedDateTime,
+  roundingConfig: RoundingConfig<DayTimeUnitInt>,
+): ZonedDateTime {
+  const isoFields = zdt.getISOFields()
+  const epochNano = roundZonedDateTimeFields(isoFields, zdt.offsetNanoseconds, roundingConfig)
+  return new ZonedDateTime(epochNano, isoFields.timeZone, isoFields.calendar)
+}
+
+// TODO: make common util with PlainDateTime, because leverages same diffDateTimes?
+function diffZonedDateTimes(
+  dt0: ZonedDateTime,
+  dt1: ZonedDateTime,
+  flip: boolean,
+  options: DiffOptions | undefined,
+): Duration {
+  const diffConfig = parseDiffOptions<Unit, UnitInt>(
+    options,
+    HOUR, // largestUnitDefault
+    NANOSECOND, // smallestUnitDefault
+    NANOSECOND, // minUnit
+    YEAR, // maxUnit
+  )
+  const { largestUnit } = diffConfig
+
+  if (largestUnit >= DAY && dt0.timeZone.id !== dt1.timeZone.id) {
+    throw new Error('Must be same timeZone')
+  }
+
+  return createDuration(
+    diffDateTimes(dt0, dt1, getCommonCalendar(dt0, dt1), flip, diffConfig),
+  )
+}

src/timeZoneImpl/fixedTimeZoneImpl.ts

@@ -6,3 +6,3 @@ import { RawTransition, TimeZoneImpl } from './timeZoneImpl'
     id: string,
-    private offsetSecs: number,
+    private offsetNano: number,
   ) {
@@ -13,7 +13,7 @@ super(id)
   getPossibleOffsets(): number[] {
-    return [this.offsetSecs]
+    return [this.offsetNano]
   }
 
   getOffset(): number {
-    return this.offsetSecs
+    return this.offsetNano
   }
@@ -20,0 +20,0 @@

src/timeZoneImpl/intlTimeZoneImpl.ts

@@ -0,4 +1,4 @@
+import { epochNanoToISOYear, isoToEpochMilli, isoYearToEpochSeconds } from '../dateUtils/epoch'
 import { hashIntlFormatParts, normalizeShortEra } from '../dateUtils/intlFormat'
-import { epochSecondsToISOYear, isoToEpochMilli, isoYearToEpochSeconds } from '../dateUtils/isoMath'
-import { milliInSecond, secondsInDay } from '../dateUtils/units'
+import { milliInSecond, nanoInSecond, nanoInSecondBI, secondsInDay } from '../dateUtils/units'
 import { OrigDateTimeFormat } from '../native/intlUtils'
@@ -9,6 +9,4 @@ import { compareValues } from '../utils/math'
 
-// Europe/Amsterdam and America/New_York have long gaps
-// see timezone.spec.ts
-// TODO: this is probably very expensive for timezones WITHOUT transitions
-const MAX_YEAR_TRAVEL = 100
+const DST_EARLIEST_YEAR = 1847 // year with the first DST transitions
+const DST_PERSIST_YEAR = new Date().getUTCFullYear() + 10 // DST won't change on or after this
 
@@ -21,2 +19,6 @@ const ISLAND_SEARCH_DAYS = [
 
+// TODO: general question: why not use minutes internally instead of seconds?
+// No... Temporal.ZonedDateTime.from({ year: 1971, month: 1, day: 1, timeZone: 'Africa/Monrovia' })
+// .offset => '-00:44:30' // seconds
+
 export class IntlTimeZoneImpl extends TimeZoneImpl {
@@ -47,26 +49,27 @@ private format: Intl.DateTimeFormat
 
-  // `zoneSecs` is like epochSecs, but from zone's pseudo-epoch
-  getPossibleOffsets(zoneSecs: number): number[] {
+  // `zoneNano` is like epochNano, but from zone's pseudo-epoch
+  getPossibleOffsets(zoneNano: bigint): number[] {
+    let lastOffsetNano: number | undefined
+
     const transitions = [
-      this.getTransition(zoneSecs, -1),
-      this.getTransition(zoneSecs - 1, 1), // subtract 1 b/c getTransition is always exclusive
+      this.getTransition(zoneNano, -1),
+      this.getTransition(zoneNano - 1n, 1), // subtract 1 b/c getTransition is always exclusive
     ].filter(Boolean) as RawTransition[]
-    let lastOffsetSecs: number | undefined
 
     // loop transitions from past to future
     for (const transition of transitions) {
-      const [transitionEpochSecs, offsetSecsBefore, offsetSecsAfter] = transition
-      // FYI, a transition's switchover to offsetSecsAfter happens
-      // *inclusively* as transitionEpochSecs
+      const [transitionEpochNano, offsetNanoBefore, offsetNanoAfter] = transition
+      // FYI, a transition's switchover to offsetNanoAfter happens
+      // *inclusively* as transitionEpochNano
 
       // two possibilities (no guarantee of chronology)
-      const epochSecsA = zoneSecs - offsetSecsBefore
-      const epochSecsB = zoneSecs - offsetSecsAfter
+      const epochNanoA = zoneNano - BigInt(offsetNanoBefore)
+      const epochNanoB = zoneNano - BigInt(offsetNanoAfter)
 
       // is the transition after both possibilities?
-      if (transitionEpochSecs > epochSecsA && transitionEpochSecs > epochSecsB) {
-        return [offsetSecsBefore]
+      if (transitionEpochNano > epochNanoA && transitionEpochNano > epochNanoB) {
+        return [offsetNanoBefore]
 
       // is the transition before both possibilities?
-      } else if (transitionEpochSecs <= epochSecsA && transitionEpochSecs <= epochSecsB) {
+      } else if (transitionEpochNano <= epochNanoA && transitionEpochNano <= epochNanoB) {
         // keep looping...
@@ -76,25 +79,29 @@
       } else {
-        return [offsetSecsBefore, offsetSecsAfter]
+        return [offsetNanoBefore, offsetNanoAfter]
       }
 
-      lastOffsetSecs = offsetSecsAfter
+      lastOffsetNano = offsetNanoAfter
     }
 
     // only found transitions before zoneSecs
-    if (lastOffsetSecs !== undefined) {
-      return [lastOffsetSecs]
+    if (lastOffsetNano !== undefined) {
+      return [lastOffsetNano]
     }
 
     // found no transitions?
-    return [this.getYearEndOffset(epochSecondsToISOYear(zoneSecs))]
+    return [
+      this.getYearEndOffsetSec(epochNanoToISOYear(zoneNano)) * nanoInSecond,
+    ]
   }
 
-  /*
-  NOTE: if Intl.DateTimeFormat's timeZoneName:'shortOffset' option were available,
-  we could parse that.
-  */
-  getOffset(epochSecs: number): number {
-    const map = hashIntlFormatParts(this.format, epochSecs * milliInSecond)
+  getOffset(epochNano: bigint): number {
+    return this.getOffsetForEpochSecs(Number(epochNano / nanoInSecondBI)) * nanoInSecond
+  }
+
+  private getOffsetForEpochSecs(epochSec: number): number {
+    // NOTE: if Intl.DateTimeFormat's timeZoneName:'shortOffset' option were available,
+    // we could parse that.
+    const map = hashIntlFormatParts(this.format, epochSec * milliInSecond)
+
     let year = parseInt(map.year)
-
     if (normalizeShortEra(map.era) === 'bce') {
@@ -114,22 +121,47 @@ year = -(year - 1)
 
-    return zoneSecs - epochSecs
+    return zoneSecs - epochSec
   }
 
   /*
-  Always exclusive. Will never return a transition that starts exactly on epochSecs
+  Always exclusive. Will never return a transition that starts exactly on epochNano
   */
-  getTransition(epochSecs: number, direction: -1 | 1): RawTransition | undefined {
-    const startYear = epochSecondsToISOYear(epochSecs)
+  getTransition(epochNano: bigint, direction: -1 | 1): RawTransition | undefined {
+    let year = epochNanoToISOYear(epochNano)
 
-    for (let yearTravel = 0; yearTravel < MAX_YEAR_TRAVEL; yearTravel++) {
-      const year = startYear + yearTravel * direction
-      const transitions = this.getTransitionsInYear(year)
-      const len = transitions.length
-      const startIndex = direction < 0 ? len - 1 : 0
+    if (year > DST_PERSIST_YEAR) {
+      // look ahead or behine ONE year
+      const res = this.getTransitionFrom(year, year + direction, direction, epochNano)
+      if (res || direction > 0) {
+        return res
+      }
+      // fast-backwards in-bounds
+      year = DST_PERSIST_YEAR
+    }
 
-      for (let travel = 0; travel < len; travel++) {
-        const transition = transitions[startIndex + travel * direction]
+    return this.getTransitionFrom(
+      Math.max(year, DST_EARLIEST_YEAR),
+      direction < 0
+        ? DST_EARLIEST_YEAR - 1 // inclusive -> exclusive
+        : DST_PERSIST_YEAR,
+      direction,
+      epochNano,
+    )
+  }
 
-        // does the current transition overtake epochSecs in the direction of travel?
-        if (compareValues(transition[0], epochSecs) === direction) {
+  getTransitionFrom(
+    year: number,
+    endYear: number, // exclusive
+    direction: -1 | 1,
+    epochNano: bigint,
+  ): RawTransition | undefined {
+    for (; year !== endYear; year += direction) {
+      let transitions = this.getTransitionsInYear(year)
+
+      if (direction < 0) {
+        transitions = transitions.slice().reverse()
+      }
+
+      for (const transition of transitions) {
+        // does the current transition overtake epochNano in the direction of travel?
+        if (compareValues(transition[0], epochNano) === direction) {
           return transition
@@ -141,6 +173,6 @@ }
 
-  private getYearEndOffset(utcYear: number): number {
+  private getYearEndOffsetSec(utcYear: number): number {
     const { yearEndOffsets } = this
     return yearEndOffsets[utcYear] ||
-      (yearEndOffsets[utcYear] = this.getOffset(
+      (yearEndOffsets[utcYear] = this.getOffsetForEpochSecs(
         isoYearToEpochSeconds(utcYear + 1) - 1,
@@ -157,19 +189,19 @@ ))
   private computeTransitionsInYear(utcYear: number): RawTransition[] {
-    const startOffsetSecs = this.getYearEndOffset(utcYear - 1) // right before start of year
-    const endOffsetSecs = this.getYearEndOffset(utcYear) // at end of year
+    const startOffsetSec = this.getYearEndOffsetSec(utcYear - 1) // right before start of year
+    const endOffsetSec = this.getYearEndOffsetSec(utcYear) // at end of year
     // FYI, a transition could be in the first second of the year, thus the exclusiveness
 
-    // TODO: make a isoYearEndEpochSeconds util? use in getYearEndOffset?
-    const startEpochSecs = isoYearToEpochSeconds(utcYear) - 1
-    const endEpochSecs = isoYearToEpochSeconds(utcYear + 1) - 1
+    // TODO: make a isoYearEndEpochSeconds util? use in getYearEndOffsetSec?
+    const startEpochSec = isoYearToEpochSeconds(utcYear) - 1
+    const endEpochSec = isoYearToEpochSeconds(utcYear + 1) - 1
 
-    if (startOffsetSecs !== endOffsetSecs) {
-      return [this.searchTransition(startEpochSecs, endEpochSecs, startOffsetSecs, endOffsetSecs)]
+    if (startOffsetSec !== endOffsetSec) {
+      return [this.searchTransition(startEpochSec, endEpochSec, startOffsetSec, endOffsetSec)]
     }
 
-    const island = this.searchIsland(startOffsetSecs, startEpochSecs)
+    const island = this.searchIsland(startOffsetSec, startEpochSec)
     if (island !== undefined) {
       return [
-        this.searchTransition(startEpochSecs, island[0], startOffsetSecs, island[1]),
-        this.searchTransition(island[0], endEpochSecs, island[1], endOffsetSecs),
+        this.searchTransition(startEpochSec, island[0], startOffsetSec, island[1]),
+        this.searchTransition(island[0], endEpochSec, island[1], endOffsetSec),
       ]
@@ -184,24 +216,24 @@ }
   private searchTransition(
-    startEpochSecs: number,
-    endEpochSecs: number,
-    startOffsetSecs: number,
-    endOffsetSecs: number,
+    startEpochSec: number,
+    endEpochSec: number,
+    startOffsetSec: number,
+    endOffsetSec: number,
   ): RawTransition {
     // keep doing binary search until start/end are 1 second apart
-    while (endEpochSecs - startEpochSecs > 1) {
-      const middleEpochSecs = Math.floor(startEpochSecs + (endEpochSecs - startEpochSecs) / 2)
-      const middleOffsetSecs = this.getOffset(middleEpochSecs)
+    while (endEpochSec - startEpochSec > 1) {
+      const middleEpochSecs = Math.floor(startEpochSec + (endEpochSec - startEpochSec) / 2)
+      const middleOffsetSecs = this.getOffsetForEpochSecs(middleEpochSecs)
 
-      if (middleOffsetSecs === startOffsetSecs) {
+      if (middleOffsetSecs === startOffsetSec) {
         // middle is same as start. move start to the middle
-        startEpochSecs = middleEpochSecs
+        startEpochSec = middleEpochSecs
       } else {
         // middle is same as end. move end to the middle
-        endEpochSecs = middleEpochSecs
+        endEpochSec = middleEpochSecs
       }
     }
     return [
-      endEpochSecs,
-      startOffsetSecs, // caller could have computed this
-      endOffsetSecs, // same
+      BigInt(endEpochSec) * nanoInSecondBI,
+      startOffsetSec * nanoInSecond,
+      endOffsetSec * nanoInSecond,
     ]
@@ -213,10 +245,10 @@ }
   private searchIsland(
-    outerOffsetSecs: number,
-    startEpochSecs: number,
-  ): [number, number] | undefined { // [epochSecs, offsetSecs]
+    outerOffsetSec: number,
+    startEpochSec: number,
+  ): [number, number] | undefined { // [epochSec, offsetSec]
     for (const days of ISLAND_SEARCH_DAYS) {
-      const epochSecs = startEpochSecs + days * secondsInDay
-      const offsetSecs = this.getOffset(epochSecs)
-      if (offsetSecs !== outerOffsetSecs) {
-        return [epochSecs, offsetSecs]
+      const epochSec = startEpochSec + days * secondsInDay
+      const offsetSec = this.getOffsetForEpochSecs(epochSec)
+      if (offsetSec !== outerOffsetSec) {
+        return [epochSec, offsetSec]
       }
@@ -223,0 +255,0 @@ }

src/timeZoneImpl/specialCases.ts

@@ -8,7 +8,9 @@ import { RawTransition } from './timeZoneImpl'
     2011: [
-      [1301752800, -36000, -39600], // start DST
-      [1316872800, -39600, -36000], // end DST
-      [1325239200, -36000, 50400], // change of time zone
+      // TODO: this was much nicer when specified in seconds
+      // TODO: have RawTransitions be seconds again?
+      [1301752800000000000n, -36000000000000, -39600000000000], // start DST
+      [1316872800000000000n, -39600000000000, -36000000000000], // end DST
+      [1325239200000000000n, -36000000000000, 50400000000000], // change of time zone
     ],
   },
 }

src/timeZoneImpl/timeZoneImpl.ts

 
-// [epochSecs, offsetSecsBefore, offsetSecsAfter]
-export type RawTransition = [number, number, number]
+export type RawTransition = [
+  bigint, // epochNano
+  number, // offsetNanoBefore
+  number, // offsetNanoAfter
+]
 
@@ -8,5 +11,5 @@ export abstract class TimeZoneImpl {
 
-  abstract getPossibleOffsets(zoneSecs: number): number[]
-  abstract getOffset(epochSecs: number): number
-  abstract getTransition(epochSecs: number, direction: -1 | 1): RawTransition | undefined
+  abstract getPossibleOffsets(zoneNano: bigint): number[] // offsetNanos
+  abstract getOffset(epochNano: bigint): number // offsetNano
+  abstract getTransition(epochNano: bigint, direction: -1 | 1): RawTransition | undefined
 }

src/timeZoneImpl/timeZoneImplQuery.ts

 import { formatOffsetISO } from '../dateUtils/isoFormat'
 import { tryParseOffsetNano } from '../dateUtils/parse'
-import { nanoInDay, nanoInSecond } from '../dateUtils/units'
+import { nanoInDay } from '../dateUtils/units'
 import { FixedTimeZoneImpl } from './fixedTimeZoneImpl'
@@ -29,3 +29,3 @@ import { IntlTimeZoneImpl } from './intlTimeZoneImpl'
       formatOffsetISO(offsetNano),
-      Math.trunc(offsetNano / nanoInSecond), // convert to seconds
+      offsetNano,
     )
@@ -32,0 +32,0 @@ }

src/utils/math.ts

@@ -0,1 +1,2 @@
+import { nanoInMinute } from '../dateUtils/units'
 import { CompareResult } from '../public/types'
@@ -31,2 +32,12 @@
 
+export function roundToMinute(nano: number): number {
+  return roundToIncrement(nano, nanoInMinute, halfExpand)
+}
+
+// like round, but does rounds negatives "down" (closer to -0.9)
+// use elsewhere?
+function halfExpand(n: number) {
+  return Math.round(Math.abs(n)) * numSign(n)
+}
+
 export function roundToIncrementBI(
@@ -33,0 +44,0 @@ num: bigint,

src/utils/obj.ts

@@ -43,2 +43,16 @@ export type ValueOf<T> = T[keyof T]
 
+export function mapHashByKeys<PropInputType, PropOutputType>(
+  input: { [prop: string]: PropInputType },
+  keys: string[],
+  func: (inputProp: PropInputType) => PropOutputType,
+): { [prop: string]: PropOutputType } {
+  const output = {} as { [prop: string]: PropOutputType }
+
+  for (const key of keys) {
+    output[key] = func(input[key])
+  }
+
+  return output
+}
+
 export function excludeUndefined(obj: GenericHash): GenericHash {
@@ -64,5 +78,1 @@ const res: GenericHash = {}
 }
-
-export function throwNew(ErrorClass: { new(message: string): Error }, message: string): any {
-  throw new ErrorClass(message)
-}

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