d3-time - npm Package Compare versions

Comparing version 3.0.0 to 3.1.0

dist/d3-time.js

@@ -1,2 +0,2 @@
-// https://d3js.org/d3-time/ v3.0.0 Copyright 2010-2021 Mike Bostock
+// https://d3js.org/d3-time/ v3.1.0 Copyright 2010-2022 Mike Bostock
 (function (global, factory) {
@@ -6,8 +6,7 @@ typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-array')) :
 (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.d3 = global.d3 || {}, global.d3));
-}(this, (function (exports, d3Array) { 'use strict';
+})(this, (function (exports, d3Array) { 'use strict';
 
-var t0 = new Date,
-    t1 = new Date;
+const t0 = new Date, t1 = new Date;
 
-function newInterval(floori, offseti, count, field) {
+function timeInterval(floori, offseti, count, field) {
 
@@ -18,25 +17,25 @@ function interval(date) {
 
-  interval.floor = function(date) {
+  interval.floor = (date) => {
     return floori(date = new Date(+date)), date;
   };
 
-  interval.ceil = function(date) {
+  interval.ceil = (date) => {
     return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
   };
 
-  interval.round = function(date) {
-    var d0 = interval(date),
-        d1 = interval.ceil(date);
+  interval.round = (date) => {
+    const d0 = interval(date), d1 = interval.ceil(date);
     return date - d0 < d1 - date ? d0 : d1;
   };
 
-  interval.offset = function(date, step) {
+  interval.offset = (date, step) => {
     return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
   };
 
-  interval.range = function(start, stop, step) {
-    var range = [], previous;
+  interval.range = (start, stop, step) => {
+    const range = [];
     start = interval.ceil(start);
     step = step == null ? 1 : Math.floor(step);
     if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
+    let previous;
     do range.push(previous = new Date(+start)), offseti(start, step), floori(start);
@@ -47,6 +46,6 @@ while (previous < start && start < stop);
 
-  interval.filter = function(test) {
-    return newInterval(function(date) {
+  interval.filter = (test) => {
+    return timeInterval((date) => {
       if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
-    }, function(date, step) {
+    }, (date, step) => {
       if (date >= date) {
@@ -63,3 +62,3 @@ if (step < 0) while (++step <= 0) {
   if (count) {
-    interval.count = function(start, end) {
+    interval.count = (start, end) => {
       t0.setTime(+start), t1.setTime(+end);
@@ -70,3 +69,3 @@ floori(t0), floori(t1);
 
-    interval.every = function(step) {
+    interval.every = (step) => {
       step = Math.floor(step);
@@ -76,4 +75,4 @@ return !isFinite(step) || !(step > 0) ? null
           : interval.filter(field
-              ? function(d) { return field(d) % step === 0; }
-              : function(d) { return interval.count(0, d) % step === 0; });
+              ? (d) => field(d) % step === 0
+              : (d) => interval.count(0, d) % step === 0);
     };
@@ -85,7 +84,7 @@ }
 
-var millisecond = newInterval(function() {
+const millisecond = timeInterval(() => {
   // noop
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step);
-}, function(start, end) {
+}, (start, end) => {
   return end - start;
@@ -95,16 +94,17 @@ });
 // An optimized implementation for this simple case.
-millisecond.every = function(k) {
+millisecond.every = (k) => {
   k = Math.floor(k);
   if (!isFinite(k) || !(k > 0)) return null;
   if (!(k > 1)) return millisecond;
-  return newInterval(function(date) {
+  return timeInterval((date) => {
     date.setTime(Math.floor(date / k) * k);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setTime(+date + step * k);
-  }, function(start, end) {
+  }, (start, end) => {
     return (end - start) / k;
   });
 };
-var milliseconds = millisecond.range;
 
+const milliseconds = millisecond.range;
+
 const durationSecond = 1000;
@@ -118,36 +118,63 @@ const durationMinute = durationSecond * 60;
 
-var second = newInterval(function(date) {
+const second = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds());
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationSecond);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationSecond;
-}, function(date) {
+}, (date) => {
   return date.getUTCSeconds();
 });
-var seconds = second.range;
 
-var minute = newInterval(function(date) {
+const seconds = second.range;
+
+const timeMinute = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond);
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationMinute);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationMinute;
-}, function(date) {
+}, (date) => {
   return date.getMinutes();
 });
-var minutes = minute.range;
 
-var hour = newInterval(function(date) {
+const timeMinutes = timeMinute.range;
+
+const utcMinute = timeInterval((date) => {
+  date.setUTCSeconds(0, 0);
+}, (date, step) => {
+  date.setTime(+date + step * durationMinute);
+}, (start, end) => {
+  return (end - start) / durationMinute;
+}, (date) => {
+  return date.getUTCMinutes();
+});
+
+const utcMinutes = utcMinute.range;
+
+const timeHour = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationHour);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationHour;
-}, function(date) {
+}, (date) => {
   return date.getHours();
 });
-var hours = hour.range;
 
-var day = newInterval(
+const timeHours = timeHour.range;
+
+const utcHour = timeInterval((date) => {
+  date.setUTCMinutes(0, 0, 0);
+}, (date, step) => {
+  date.setTime(+date + step * durationHour);
+}, (start, end) => {
+  return (end - start) / durationHour;
+}, (date) => {
+  return date.getUTCHours();
+});
+
+const utcHours = utcHour.range;
+
+const timeDay = timeInterval(
   date => date.setHours(0, 0, 0, 0),
@@ -158,11 +185,36 @@ (date, step) => date.setDate(date.getDate() + step),
 );
-var days = day.range;
 
-function weekday(i) {
-  return newInterval(function(date) {
+const timeDays = timeDay.range;
+
+const utcDay = timeInterval((date) => {
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+  return (end - start) / durationDay;
+}, (date) => {
+  return date.getUTCDate() - 1;
+});
+
+const utcDays = utcDay.range;
+
+const unixDay = timeInterval((date) => {
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+  return (end - start) / durationDay;
+}, (date) => {
+  return Math.floor(date / durationDay);
+});
+
+const unixDays = unixDay.range;
+
+function timeWeekday(i) {
+  return timeInterval((date) => {
     date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
     date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setDate(date.getDate() + step * 7);
-  }, function(start, end) {
+  }, (start, end) => {
     return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
@@ -172,38 +224,79 @@ });
 
-var sunday = weekday(0);
-var monday = weekday(1);
-var tuesday = weekday(2);
-var wednesday = weekday(3);
-var thursday = weekday(4);
-var friday = weekday(5);
-var saturday = weekday(6);
+const timeSunday = timeWeekday(0);
+const timeMonday = timeWeekday(1);
+const timeTuesday = timeWeekday(2);
+const timeWednesday = timeWeekday(3);
+const timeThursday = timeWeekday(4);
+const timeFriday = timeWeekday(5);
+const timeSaturday = timeWeekday(6);
 
-var sundays = sunday.range;
-var mondays = monday.range;
-var tuesdays = tuesday.range;
-var wednesdays = wednesday.range;
-var thursdays = thursday.range;
-var fridays = friday.range;
-var saturdays = saturday.range;
+const timeSundays = timeSunday.range;
+const timeMondays = timeMonday.range;
+const timeTuesdays = timeTuesday.range;
+const timeWednesdays = timeWednesday.range;
+const timeThursdays = timeThursday.range;
+const timeFridays = timeFriday.range;
+const timeSaturdays = timeSaturday.range;
 
-var month = newInterval(function(date) {
+function utcWeekday(i) {
+  return timeInterval((date) => {
+    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
+    date.setUTCHours(0, 0, 0, 0);
+  }, (date, step) => {
+    date.setUTCDate(date.getUTCDate() + step * 7);
+  }, (start, end) => {
+    return (end - start) / durationWeek;
+  });
+}
+
+const utcSunday = utcWeekday(0);
+const utcMonday = utcWeekday(1);
+const utcTuesday = utcWeekday(2);
+const utcWednesday = utcWeekday(3);
+const utcThursday = utcWeekday(4);
+const utcFriday = utcWeekday(5);
+const utcSaturday = utcWeekday(6);
+
+const utcSundays = utcSunday.range;
+const utcMondays = utcMonday.range;
+const utcTuesdays = utcTuesday.range;
+const utcWednesdays = utcWednesday.range;
+const utcThursdays = utcThursday.range;
+const utcFridays = utcFriday.range;
+const utcSaturdays = utcSaturday.range;
+
+const timeMonth = timeInterval((date) => {
   date.setDate(1);
   date.setHours(0, 0, 0, 0);
-}, function(date, step) {
+}, (date, step) => {
   date.setMonth(date.getMonth() + step);
-}, function(start, end) {
+}, (start, end) => {
   return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
-}, function(date) {
+}, (date) => {
   return date.getMonth();
 });
-var months = month.range;
 
-var year = newInterval(function(date) {
+const timeMonths = timeMonth.range;
+
+const utcMonth = timeInterval((date) => {
+  date.setUTCDate(1);
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCMonth(date.getUTCMonth() + step);
+}, (start, end) => {
+  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, (date) => {
+  return date.getUTCMonth();
+});
+
+const utcMonths = utcMonth.range;
+
+const timeYear = timeInterval((date) => {
   date.setMonth(0, 1);
   date.setHours(0, 0, 0, 0);
-}, function(date, step) {
+}, (date, step) => {
   date.setFullYear(date.getFullYear() + step);
-}, function(start, end) {
+}, (start, end) => {
   return end.getFullYear() - start.getFullYear();
-}, function(date) {
+}, (date) => {
   return date.getFullYear();
@@ -213,93 +306,22 @@ });
 // An optimized implementation for this simple case.
-year.every = function(k) {
-  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+timeYear.every = (k) => {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
     date.setFullYear(Math.floor(date.getFullYear() / k) * k);
     date.setMonth(0, 1);
     date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setFullYear(date.getFullYear() + step * k);
   });
 };
-var years = year.range;
 
-var utcMinute = newInterval(function(date) {
-  date.setUTCSeconds(0, 0);
-}, function(date, step) {
-  date.setTime(+date + step * durationMinute);
-}, function(start, end) {
-  return (end - start) / durationMinute;
-}, function(date) {
-  return date.getUTCMinutes();
-});
-var utcMinutes = utcMinute.range;
+const timeYears = timeYear.range;
 
-var utcHour = newInterval(function(date) {
-  date.setUTCMinutes(0, 0, 0);
-}, function(date, step) {
-  date.setTime(+date + step * durationHour);
-}, function(start, end) {
-  return (end - start) / durationHour;
-}, function(date) {
-  return date.getUTCHours();
-});
-var utcHours = utcHour.range;
-
-var utcDay = newInterval(function(date) {
-  date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setUTCDate(date.getUTCDate() + step);
-}, function(start, end) {
-  return (end - start) / durationDay;
-}, function(date) {
-  return date.getUTCDate() - 1;
-});
-var utcDays = utcDay.range;
-
-function utcWeekday(i) {
-  return newInterval(function(date) {
-    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
-    date.setUTCHours(0, 0, 0, 0);
-  }, function(date, step) {
-    date.setUTCDate(date.getUTCDate() + step * 7);
-  }, function(start, end) {
-    return (end - start) / durationWeek;
-  });
-}
-
-var utcSunday = utcWeekday(0);
-var utcMonday = utcWeekday(1);
-var utcTuesday = utcWeekday(2);
-var utcWednesday = utcWeekday(3);
-var utcThursday = utcWeekday(4);
-var utcFriday = utcWeekday(5);
-var utcSaturday = utcWeekday(6);
-
-var utcSundays = utcSunday.range;
-var utcMondays = utcMonday.range;
-var utcTuesdays = utcTuesday.range;
-var utcWednesdays = utcWednesday.range;
-var utcThursdays = utcThursday.range;
-var utcFridays = utcFriday.range;
-var utcSaturdays = utcSaturday.range;
-
-var utcMonth = newInterval(function(date) {
-  date.setUTCDate(1);
-  date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
-  date.setUTCMonth(date.getUTCMonth() + step);
-}, function(start, end) {
-  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
-}, function(date) {
-  return date.getUTCMonth();
-});
-var utcMonths = utcMonth.range;
-
-var utcYear = newInterval(function(date) {
+const utcYear = timeInterval((date) => {
   date.setUTCMonth(0, 1);
   date.setUTCHours(0, 0, 0, 0);
-}, function(date, step) {
+}, (date, step) => {
   date.setUTCFullYear(date.getUTCFullYear() + step);
-}, function(start, end) {
+}, (start, end) => {
   return end.getUTCFullYear() - start.getUTCFullYear();
-}, function(date) {
+}, (date) => {
   return date.getUTCFullYear();
@@ -309,13 +331,14 @@ });
 // An optimized implementation for this simple case.
-utcYear.every = function(k) {
-  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
+utcYear.every = (k) => {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
     date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
     date.setUTCMonth(0, 1);
     date.setUTCHours(0, 0, 0, 0);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setUTCFullYear(date.getUTCFullYear() + step * k);
   });
 };
-var utcYears = utcYear.range;
 
+const utcYears = utcYear.range;
+
 function ticker(year, month, week, day, hour, minute) {
@@ -364,38 +387,40 @@
 
-const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute);
-const [timeTicks, timeTickInterval] = ticker(year, month, sunday, day, hour, minute);
+const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, unixDay, utcHour, utcMinute);
+const [timeTicks, timeTickInterval] = ticker(timeYear, timeMonth, timeSunday, timeDay, timeHour, timeMinute);
 
-exports.timeDay = day;
-exports.timeDays = days;
-exports.timeFriday = friday;
-exports.timeFridays = fridays;
-exports.timeHour = hour;
-exports.timeHours = hours;
-exports.timeInterval = newInterval;
+exports.timeDay = timeDay;
+exports.timeDays = timeDays;
+exports.timeFriday = timeFriday;
+exports.timeFridays = timeFridays;
+exports.timeHour = timeHour;
+exports.timeHours = timeHours;
+exports.timeInterval = timeInterval;
 exports.timeMillisecond = millisecond;
 exports.timeMilliseconds = milliseconds;
-exports.timeMinute = minute;
-exports.timeMinutes = minutes;
-exports.timeMonday = monday;
-exports.timeMondays = mondays;
-exports.timeMonth = month;
-exports.timeMonths = months;
-exports.timeSaturday = saturday;
-exports.timeSaturdays = saturdays;
+exports.timeMinute = timeMinute;
+exports.timeMinutes = timeMinutes;
+exports.timeMonday = timeMonday;
+exports.timeMondays = timeMondays;
+exports.timeMonth = timeMonth;
+exports.timeMonths = timeMonths;
+exports.timeSaturday = timeSaturday;
+exports.timeSaturdays = timeSaturdays;
 exports.timeSecond = second;
 exports.timeSeconds = seconds;
-exports.timeSunday = sunday;
-exports.timeSundays = sundays;
-exports.timeThursday = thursday;
-exports.timeThursdays = thursdays;
+exports.timeSunday = timeSunday;
+exports.timeSundays = timeSundays;
+exports.timeThursday = timeThursday;
+exports.timeThursdays = timeThursdays;
 exports.timeTickInterval = timeTickInterval;
 exports.timeTicks = timeTicks;
-exports.timeTuesday = tuesday;
-exports.timeTuesdays = tuesdays;
-exports.timeWednesday = wednesday;
-exports.timeWednesdays = wednesdays;
-exports.timeWeek = sunday;
-exports.timeWeeks = sundays;
-exports.timeYear = year;
-exports.timeYears = years;
+exports.timeTuesday = timeTuesday;
+exports.timeTuesdays = timeTuesdays;
+exports.timeWednesday = timeWednesday;
+exports.timeWednesdays = timeWednesdays;
+exports.timeWeek = timeSunday;
+exports.timeWeeks = timeSundays;
+exports.timeYear = timeYear;
+exports.timeYears = timeYears;
+exports.unixDay = unixDay;
+exports.unixDays = unixDays;
 exports.utcDay = utcDay;
@@ -434,4 +459,2 @@ exports.utcDays = utcDays;
 
-Object.defineProperty(exports, '__esModule', { value: true });
-
-})));
+}));

dist/d3-time.min.js

@@ -1,2 +0,2 @@
-// https://d3js.org/d3-time/ v3.0.0 Copyright 2010-2021 Mike Bostock
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports,require("d3-array")):"function"==typeof define&&define.amd?define(["exports","d3-array"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).d3=e.d3||{},e.d3)}(this,(function(e,t){"use strict";var n=new Date,u=new Date;function r(e,t,i,o){function a(t){return e(t=0===arguments.length?new Date:new Date(+t)),t}return a.floor=function(t){return e(t=new Date(+t)),t},a.ceil=function(n){return e(n=new Date(n-1)),t(n,1),e(n),n},a.round=function(e){var t=a(e),n=a.ceil(e);return e-t<n-e?t:n},a.offset=function(e,n){return t(e=new Date(+e),null==n?1:Math.floor(n)),e},a.range=function(n,u,r){var i,o=[];if(n=a.ceil(n),r=null==r?1:Math.floor(r),!(n<u&&r>0))return o;do{o.push(i=new Date(+n)),t(n,r),e(n)}while(i<n&&n<u);return o},a.filter=function(n){return r((function(t){if(t>=t)for(;e(t),!n(t);)t.setTime(t-1)}),(function(e,u){if(e>=e)if(u<0)for(;++u<=0;)for(;t(e,-1),!n(e););else for(;--u>=0;)for(;t(e,1),!n(e););}))},i&&(a.count=function(t,r){return n.setTime(+t),u.setTime(+r),e(n),e(u),Math.floor(i(n,u))},a.every=function(e){return e=Math.floor(e),isFinite(e)&&e>0?e>1?a.filter(o?function(t){return o(t)%e==0}:function(t){return a.count(0,t)%e==0}):a:null}),a}var i=r((function(){}),(function(e,t){e.setTime(+e+t)}),(function(e,t){return t-e}));i.every=function(e){return e=Math.floor(e),isFinite(e)&&e>0?e>1?r((function(t){t.setTime(Math.floor(t/e)*e)}),(function(t,n){t.setTime(+t+n*e)}),(function(t,n){return(n-t)/e})):i:null};var o=i.range;const a=1e3,c=6e4,s=36e5,f=864e5,l=6048e5,g=2592e6,T=31536e6;var d=r((function(e){e.setTime(e-e.getMilliseconds())}),(function(e,t){e.setTime(+e+t*a)}),(function(e,t){return(t-e)/a}),(function(e){return e.getUTCSeconds()})),m=d.range,M=r((function(e){e.setTime(e-e.getMilliseconds()-e.getSeconds()*a)}),(function(e,t){e.setTime(+e+t*c)}),(function(e,t){return(t-e)/c}),(function(e){return 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+// https://d3js.org/d3-time/ v3.1.0 Copyright 2010-2022 Mike Bostock
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports,require("d3-array")):"function"==typeof define&&define.amd?define(["exports","d3-array"],t):t((e="undefined"!=typeof globalThis?globalThis:e||self).d3=e.d3||{},e.d3)}(this,(function(e,t){"use strict";const n=new Date,s=new Date;function r(e,t,a,u){function i(t){return e(t=0===arguments.length?new Date:new Date(+t)),t}return i.floor=t=>(e(t=new Date(+t)),t),i.ceil=n=>(e(n=new Date(n-1)),t(n,1),e(n),n),i.round=e=>{const t=i(e),n=i.ceil(e);return e-t<n-e?t:n},i.offset=(e,n)=>(t(e=new Date(+e),null==n?1:Math.floor(n)),e),i.range=(n,s,r)=>{const a=[];if(n=i.ceil(n),r=null==r?1:Math.floor(r),!(n<s&&r>0))return a;let u;do{a.push(u=new Date(+n)),t(n,r),e(n)}while(u<n&&n<s);return a},i.filter=n=>r((t=>{if(t>=t)for(;e(t),!n(t);)t.setTime(t-1)}),((e,s)=>{if(e>=e)if(s<0)for(;++s<=0;)for(;t(e,-1),!n(e););else 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W(e){return r((t=>{t.setDate(t.getDate()-(t.getDay()+7-e)%7),t.setHours(0,0,0,0)}),((e,t)=>{e.setDate(e.getDate()+7*t)}),((e,t)=>(t-e-(t.getTimezoneOffset()-e.getTimezoneOffset())*o)/g))}const x=W(0),b=W(1),z=W(2),O=W(3),I=W(4),j=W(5),q=W(6),A=x.range,B=b.range,E=z.range,G=O.range,J=I.range,K=j.range,L=q.range;function N(e){return r((t=>{t.setUTCDate(t.getUTCDate()-(t.getUTCDay()+7-e)%7),t.setUTCHours(0,0,0,0)}),((e,t)=>{e.setUTCDate(e.getUTCDate()+7*t)}),((e,t)=>(t-e)/g))}const 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ge=ce.range,Te=r((e=>{e.setUTCMonth(0,1),e.setUTCHours(0,0,0,0)}),((e,t)=>{e.setUTCFullYear(e.getUTCFullYear()+t)}),((e,t)=>t.getUTCFullYear()-e.getUTCFullYear()),(e=>e.getUTCFullYear()));Te.every=e=>isFinite(e=Math.floor(e))&&e>0?r((t=>{t.setUTCFullYear(Math.floor(t.getUTCFullYear()/e)*e),t.setUTCMonth(0,1),t.setUTCHours(0,0,0,0)}),((t,n)=>{t.setUTCFullYear(t.getUTCFullYear()+n*e)})):null;const de=Te.range;function fe(e,n,s,r,u,m){const y=[[f,1,i],[f,5,5e3],[f,15,15e3],[f,30,3e4],[m,1,o],[m,5,3e5],[m,15,9e5],[m,30,18e5],[u,1,l],[u,3,108e5],[u,6,216e5],[u,12,432e5],[r,1,c],[r,2,1728e5],[s,1,g],[n,1,T],[n,3,7776e6],[e,1,d]];function M(n,s,r){const u=Math.abs(s-n)/r,i=t.bisector((([,,e])=>e)).right(y,u);if(i===y.length)return e.every(t.tickStep(n/d,s/d,r));if(0===i)return a.every(Math.max(t.tickStep(n,s,r),1));const[o,l]=y[u/y[i-1][2]<y[i][2]/u?i-1:i];return o.every(l)}return[function(e,t,n){const s=t<e;s&&([e,t]=[t,e]);const r=n&&"function"==typeof n.range?n:M(e,t,n),a=r?r.range(e,+t+1):[];return s?a.reverse():a},M]}const[me,ye]=fe(Te,oe,P,k,F,h),[Me,he]=fe(ce,ue,x,S,U,y);e.timeDay=S,e.timeDays=H,e.timeFriday=j,e.timeFridays=K,e.timeHour=U,e.timeHours=D,e.timeInterval=r,e.timeMillisecond=a,e.timeMilliseconds=u,e.timeMinute=y,e.timeMinutes=M,e.timeMonday=b,e.timeMondays=B,e.timeMonth=ue,e.timeMonths=ie,e.timeSaturday=q,e.timeSaturdays=L,e.timeSecond=f,e.timeSeconds=m,e.timeSunday=x,e.timeSundays=A,e.timeThursday=I,e.timeThursdays=J,e.timeTickInterval=he,e.timeTicks=Me,e.timeTuesday=z,e.timeTuesdays=E,e.timeWednesday=O,e.timeWednesdays=G,e.timeWeek=x,e.timeWeeks=A,e.timeYear=ce,e.timeYears=ge,e.unixDay=k,e.unixDays=w,e.utcDay=p,e.utcDays=v,e.utcFriday=Z,e.utcFridays=re,e.utcHour=F,e.utcHours=Y,e.utcMillisecond=a,e.utcMilliseconds=u,e.utcMinute=h,e.utcMinutes=C,e.utcMonday=Q,e.utcMondays=ee,e.utcMonth=oe,e.utcMonths=le,e.utcSaturday=$,e.utcSaturdays=ae,e.utcSecond=f,e.utcSeconds=m,e.utcSunday=P,e.utcSundays=_,e.utcThursday=X,e.utcThursdays=se,e.utcTickInterval=ye,e.utcTicks=me,e.utcTuesday=R,e.utcTuesdays=te,e.utcWednesday=V,e.utcWednesdays=ne,e.utcWeek=P,e.utcWeeks=_,e.utcYear=Te,e.utcYears=de}));

package.json

 {
   "name": "d3-time",
-  "version": "3.0.0",
+  "version": "3.1.0",
   "description": "A calculator for humanity’s peculiar conventions of time.",
@@ -40,5 +40,5 @@ "homepage": "https://d3js.org/d3-time/",
   "devDependencies": {
-    "eslint": "7",
-    "mocha": "8",
-    "rollup": "2",
+    "eslint": "8",
+    "mocha": "10",
+    "rollup": "3",
     "rollup-plugin-terser": "7"
@@ -45,0 +45,0 @@ },

README.md

@@ -61,3 +61,3 @@ # d3-time
 
-<a name="_interval" href="#_interval">#</a> <i>interval</i>([<i>date</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="_interval" href="#_interval">#</a> <i>interval</i>([<i>date</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -70,3 +70,3 @@ Equivalent to [*interval*.floor](#interval_floor), except if *date* is not specified, it defaults to the current time. For example, [d3.timeYear](#timeYear)(*date*) and d3.timeYear.floor(*date*) are equivalent.
 
-<a name="interval_floor" href="#interval_floor">#</a> <i>interval</i>.<b>floor</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_floor" href="#interval_floor">#</a> <i>interval</i>.<b>floor</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -88,3 +88,3 @@ Returns a new date representing the latest interval boundary date before or equal to *date*. For example, [d3.timeDay](#timeDay).floor(*date*) typically returns 12:00 AM local time on the given *date*.
 
-<a name="interval_round" href="#interval_round">#</a> <i>interval</i>.<b>round</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_round" href="#interval_round">#</a> <i>interval</i>.<b>round</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -95,3 +95,3 @@ Returns a new date representing the closest interval boundary date to *date*. For example, [d3.timeDay](#timeDay).round(*date*) typically returns 12:00 AM local time on the given *date* if it is on or before noon, and 12:00 AM of the following day if it is after noon.
 
-<a name="interval_ceil" href="#interval_ceil">#</a> <i>interval</i>.<b>ceil</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_ceil" href="#interval_ceil">#</a> <i>interval</i>.<b>ceil</b>(<i>date</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -102,7 +102,7 @@ Returns a new date representing the earliest interval boundary date after or equal to *date*. For example, [d3.timeDay](#timeDay).ceil(*date*) typically returns 12:00 AM local time on the date following the given *date*.
 
-<a name="interval_offset" href="#interval_offset">#</a> <i>interval</i>.<b>offset</b>(<i>date</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_offset" href="#interval_offset">#</a> <i>interval</i>.<b>offset</b>(<i>date</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
 Returns a new date equal to *date* plus *step* intervals. If *step* is not specified it defaults to 1. If *step* is negative, then the returned date will be before the specified *date*; if *step* is zero, then a copy of the specified *date* is returned; if *step* is not an integer, it is [floored](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/floor). This method does not round the specified *date* to the interval. For example, if *date* is today at 5:34 PM, then [d3.timeDay](#timeDay).offset(*date*, 1) returns 5:34 PM tomorrow (even if daylight saving changes!).
 
-<a name="interval_range" href="#interval_range">#</a> <i>interval</i>.<b>range</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_range" href="#interval_range">#</a> <i>interval</i>.<b>range</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -125,3 +125,3 @@ Returns an array of dates representing every interval boundary after or equal to *start* (inclusive) and before *stop* (exclusive). If *step* is specified, then every *step*th boundary will be returned; for example, for the [d3.timeDay](#timeDay) interval a *step* of 2 will return every other day. If *step* is not an integer, it is [floored](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/floor).
 
-<a name="interval_filter" href="#interval_filter">#</a> <i>interval</i>.<b>filter</b>(<i>test</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_filter" href="#interval_filter">#</a> <i>interval</i>.<b>filter</b>(<i>test</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -136,3 +136,3 @@ Returns a new interval that is a filtered subset of this interval using the specified *test* function. The *test* function is passed a date and should return true if and only if the specified date should be considered part of the interval. For example, to create an interval that returns the 1st, 11th, 21th and 31th (if it exists) of each month:
 
-<a name="interval_every" href="#interval_every">#</a> <i>interval</i>.<b>every</b>(<i>step</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_every" href="#interval_every">#</a> <i>interval</i>.<b>every</b>(<i>step</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -155,3 +155,3 @@ Returns a [filtered](#interval_filter) view of this interval representing every *step*th date. The meaning of *step* is dependent on this interval’s parent interval as defined by the field function. For example, [d3.timeMinute](#timeMinute).every(15) returns an interval representing every fifteen minutes, starting on the hour: :00, :15, :30, :45, <i>etc.</i> Note that for some intervals, the resulting dates may not be uniformly-spaced; [d3.timeDay](#timeDay)’s parent interval is [d3.timeMonth](#timeMonth), and thus the interval number resets at the start of each month. If *step* is not valid, returns null. If *step* is one, returns this interval.
 
-<a name="interval_count" href="#interval_count">#</a> <i>interval</i>.<b>count</b>(<i>start</i>, <i>end</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="interval_count" href="#interval_count">#</a> <i>interval</i>.<b>count</b>(<i>start</i>, <i>end</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -170,3 +170,3 @@ Returns the number of interval boundaries after *start* (exclusive) and before or equal to *end* (inclusive). Note that this behavior is slightly different than [*interval*.range](#interval_range) because its purpose is to return the zero-based number of the specified *end* date relative to the specified *start* date. For example, to compute the current zero-based day-of-year number:
 
-<a name="timeInterval" href="#timeInterval">#</a> d3.<b>timeInterval</b>(<i>floor</i>, <i>offset</i>[, <i>count</i>[, <i>field</i>]]) · [Source](https://github.com/d3/d3-time/blob/master/src/interval.js)
+<a name="timeInterval" href="#timeInterval">#</a> d3.<b>timeInterval</b>(<i>floor</i>, <i>offset</i>[, <i>count</i>[, <i>field</i>]]) · [Source](https://github.com/d3/d3-time/blob/main/src/interval.js)
 
@@ -187,3 +187,3 @@ Constructs a new custom interval given the specified *floor* and *offset* functions and an optional *count* function.
 
-<a name="timeMillisecond" href="#timeMillisecond">#</a> d3.<b>timeMillisecond</b> · [Source](https://github.com/d3/d3-time/blob/master/src/millisecond.js "Source")
+<a name="timeMillisecond" href="#timeMillisecond">#</a> d3.<b>timeMillisecond</b> · [Source](https://github.com/d3/d3-time/blob/main/src/millisecond.js "Source")
 <br><a href="#timeMillisecond">#</a> d3.<b>utcMillisecond</b>
@@ -193,3 +193,3 @@
 
-<a name="timeSecond" href="#timeSecond">#</a> d3.<b>timeSecond</b> · [Source](https://github.com/d3/d3-time/blob/master/src/second.js "Source")
+<a name="timeSecond" href="#timeSecond">#</a> d3.<b>timeSecond</b> · [Source](https://github.com/d3/d3-time/blob/main/src/second.js "Source")
 <br><a href="#timeSecond">#</a> d3.<b>utcSecond</b>
@@ -199,64 +199,65 @@
 
-<a name="timeMinute" href="#timeMinute">#</a> d3.<b>timeMinute</b> · [Source](https://github.com/d3/d3-time/blob/master/src/minute.js "Source")
-<br><a href="#timeMinute">#</a> d3.<b>utcMinute</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcMinute.js "Source")
+<a name="timeMinute" href="#timeMinute">#</a> d3.<b>timeMinute</b> · [Source](https://github.com/d3/d3-time/blob/main/src/minute.js "Source")
+<br><a href="#timeMinute">#</a> d3.<b>utcMinute</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcMinute.js "Source")
 
 Minutes (e.g., 01:02:00 AM); 60 seconds. Note that ECMAScript [ignores leap seconds](http://www.ecma-international.org/ecma-262/5.1/#sec-15.9.1.1).
 
-<a name="timeHour" href="#timeHour">#</a> d3.<b>timeHour</b> · [Source](https://github.com/d3/d3-time/blob/master/src/hour.js "Source")
-<br><a href="#timeHour">#</a> d3.<b>utcHour</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcHour.js "Source")
+<a name="timeHour" href="#timeHour">#</a> d3.<b>timeHour</b> · [Source](https://github.com/d3/d3-time/blob/main/src/hour.js "Source")
+<br><a href="#timeHour">#</a> d3.<b>utcHour</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcHour.js "Source")
 
 Hours (e.g., 01:00 AM); 60 minutes. Note that advancing time by one hour in local time can return the same hour or skip an hour due to daylight saving.
 
-<a name="timeDay" href="#timeDay">#</a> d3.<b>timeDay</b> · [Source](https://github.com/d3/d3-time/blob/master/src/day.js "Source")
-<br><a href="#timeDay">#</a> d3.<b>utcDay</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcDay.js "Source")
+<a name="timeDay" href="#timeDay">#</a> d3.<b>timeDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/day.js "Source")
+<br><a href="#timeDay">#</a> d3.<b>utcDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcDay.js "Source")
+<br><a href="#timeDay">#</a> d3.<b>unixDay</b> · [Source](https://github.com/d3/d3-time/blob/main/src/unixDay.js "Source")
 
-Days (e.g., February 7, 2012 at 12:00 AM); typically 24 hours. Days in local time may range from 23 to 25 hours due to daylight saving.
+Days (e.g., February 7, 2012 at 12:00 AM); typically 24 hours. Days in local time may range from 23 to 25 hours due to daylight saving. d3.unixDay is like [d3.utcDay](#timeDay), except it counts days since the UNIX epoch (January 1, 1970) such that *interval*.every returns uniformly-spaced dates rather than varying based on day-of-month.
 
-<a name="timeWeek" href="#timeWeek">#</a> d3.<b>timeWeek</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js "Source")
-<br><a href="#timeWeek">#</a> d3.<b>utcWeek</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js "Source")
+<a name="timeWeek" href="#timeWeek">#</a> d3.<b>timeWeek</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js "Source")
+<br><a href="#timeWeek">#</a> d3.<b>utcWeek</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js "Source")
 
-Alias for [d3.timeSunday](#timeSunday); 7 days and typically 168 hours. Weeks in local time may range from 167 to 169 hours due on daylight saving.
+Alias for [d3.timeSunday](#timeSunday); 7 days and typically 168 hours. Weeks in local time may range from 167 to 169 hours due to daylight saving.
 
-<a name="timeSunday" href="#timeSunday">#</a> d3.<b>timeSunday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeSunday">#</a> d3.<b>utcSunday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeSunday" href="#timeSunday">#</a> d3.<b>timeSunday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeSunday">#</a> d3.<b>utcSunday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Sunday-based weeks (e.g., February 5, 2012 at 12:00 AM).
 
-<a name="timeMonday" href="#timeMonday">#</a> d3.<b>timeMonday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeMonday">#</a> d3.<b>utcMonday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeMonday" href="#timeMonday">#</a> d3.<b>timeMonday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeMonday">#</a> d3.<b>utcMonday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Monday-based weeks (e.g., February 6, 2012 at 12:00 AM).
 
-<a name="timeTuesday" href="#timeTuesday">#</a> d3.<b>timeTuesday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeTuesday">#</a> d3.<b>utcTuesday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeTuesday" href="#timeTuesday">#</a> d3.<b>timeTuesday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeTuesday">#</a> d3.<b>utcTuesday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Tuesday-based weeks (e.g., February 7, 2012 at 12:00 AM).
 
-<a name="timeWednesday" href="#timeWednesday">#</a> d3.<b>timeWednesday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeWednesday">#</a> d3.<b>utcWednesday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeWednesday" href="#timeWednesday">#</a> d3.<b>timeWednesday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeWednesday">#</a> d3.<b>utcWednesday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Wednesday-based weeks (e.g., February 8, 2012 at 12:00 AM).
 
-<a name="timeThursday" href="#timeThursday">#</a> d3.<b>timeThursday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeThursday">#</a> d3.<b>utcThursday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeThursday" href="#timeThursday">#</a> d3.<b>timeThursday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeThursday">#</a> d3.<b>utcThursday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Thursday-based weeks (e.g., February 9, 2012 at 12:00 AM).
 
-<a name="timeFriday" href="#timeFriday">#</a> d3.<b>timeFriday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeFriday">#</a> d3.<b>utcFriday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeFriday" href="#timeFriday">#</a> d3.<b>timeFriday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeFriday">#</a> d3.<b>utcFriday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Friday-based weeks (e.g., February 10, 2012 at 12:00 AM).
 
-<a name="timeSaturday" href="#timeSaturday">#</a> d3.<b>timeSaturday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeSaturday">#</a> d3.<b>utcSaturday</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeSaturday" href="#timeSaturday">#</a> d3.<b>timeSaturday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeSaturday">#</a> d3.<b>utcSaturday</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Saturday-based weeks (e.g., February 11, 2012 at 12:00 AM).
 
-<a name="timeMonth" href="#timeMonth">#</a> d3.<b>timeMonth</b> · [Source](https://github.com/d3/d3-time/blob/master/src/month.js "Source")
-<br><a href="#timeMonth">#</a> d3.<b>utcMonth</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcMonth.js "Source")
+<a name="timeMonth" href="#timeMonth">#</a> d3.<b>timeMonth</b> · [Source](https://github.com/d3/d3-time/blob/main/src/month.js "Source")
+<br><a href="#timeMonth">#</a> d3.<b>utcMonth</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcMonth.js "Source")
 
 Months (e.g., February 1, 2012 at 12:00 AM); ranges from 28 to 31 days.
 
-<a name="timeYear" href="#timeYear">#</a> d3.<b>timeYear</b> · [Source](https://github.com/d3/d3-time/blob/master/src/year.js "Source")
-<br><a href="#timeYear">#</a> d3.<b>utcYear</b> · [Source](https://github.com/d3/d3-time/blob/master/src/utcYear.js "Source")
+<a name="timeYear" href="#timeYear">#</a> d3.<b>timeYear</b> · [Source](https://github.com/d3/d3-time/blob/main/src/year.js "Source")
+<br><a href="#timeYear">#</a> d3.<b>utcYear</b> · [Source](https://github.com/d3/d3-time/blob/main/src/utcYear.js "Source")
 
@@ -269,3 +270,3 @@ Years (e.g., January 1, 2012 at 12:00 AM); ranges from 365 to 366 days.
 
-<a name="timeMilliseconds" href="#timeMilliseconds">#</a> d3.<b>timeMilliseconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/millisecond.js)
+<a name="timeMilliseconds" href="#timeMilliseconds">#</a> d3.<b>timeMilliseconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/millisecond.js)
 <br><a href="#timeMilliseconds">#</a> d3.<b>utcMilliseconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>])
@@ -275,3 +276,3 @@
 
-<a name="timeSeconds" href="#timeSeconds">#</a> d3.<b>timeSeconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/second.js)
+<a name="timeSeconds" href="#timeSeconds">#</a> d3.<b>timeSeconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/second.js)
 <br><a href="#timeSeconds">#</a> d3.<b>utcSeconds</b>(<i>start</i>, <i>stop</i>[, <i>step</i>])
@@ -281,16 +282,17 @@
 
-<a name="timeMinutes" href="#timeMinutes">#</a> d3.<b>timeMinutes</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/minute.js)
-<br><a href="#timeMinutes">#</a> d3.<b>utcMinutes</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcMinute.js)
+<a name="timeMinutes" href="#timeMinutes">#</a> d3.<b>timeMinutes</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/minute.js)
+<br><a href="#timeMinutes">#</a> d3.<b>utcMinutes</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcMinute.js)
 
 Aliases for [d3.timeMinute](#timeMinute).[range](#interval_range) and [d3.utcMinute](#timeMinute).[range](#interval_range).
 
-<a name="timeHours" href="#timeHours">#</a> d3.<b>timeHours</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/hour.js)
-<br><a href="#timeHours">#</a> d3.<b>utcHours</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcHour.js)
+<a name="timeHours" href="#timeHours">#</a> d3.<b>timeHours</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/hour.js)
+<br><a href="#timeHours">#</a> d3.<b>utcHours</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcHour.js)
 
 Aliases for [d3.timeHour](#timeHour).[range](#interval_range) and [d3.utcHour](#timeHour).[range](#interval_range).
 
-<a name="timeDays" href="#timeDays">#</a> d3.<b>timeDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/day.js)
-<br><a href="#timeDays">#</a> d3.<b>utcDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcDay.js)
+<a name="timeDays" href="#timeDays">#</a> d3.<b>timeDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/day.js)
+<br><a href="#timeDays">#</a> d3.<b>utcDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcDay.js)
+<br><a href="#timeDays">#</a> d3.<b>unixDays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/unixDay.js)
 
-Aliases for [d3.timeDay](#timeDay).[range](#interval_range) and [d3.utcDay](#timeDay).[range](#interval_range).
+Aliases for [d3.timeDay](#timeDay).[range](#interval_range), [d3.utcDay](#timeDay).[range](#interval_range), and [d3.unixDay](#timeDay).[range](#interval_range).
 
@@ -302,44 +304,44 @@ <a name="timeWeeks" href="#timeWeeks">#</a> d3.<b>timeWeeks</b>(<i>start</i>, <i>stop</i>[, <i>step</i>])
 
-<a name="timeSundays" href="#timeSundays">#</a> d3.<b>timeSundays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeSundays">#</a> d3.<b>utcSundays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeSundays" href="#timeSundays">#</a> d3.<b>timeSundays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeSundays">#</a> d3.<b>utcSundays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeSunday](#timeSunday).[range](#interval_range) and [d3.utcSunday](#timeSunday).[range](#interval_range).
 
-<a name="timeMondays" href="#timeMondays">#</a> d3.<b>timeMondays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeMondays">#</a> d3.<b>utcMondays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeMondays" href="#timeMondays">#</a> d3.<b>timeMondays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeMondays">#</a> d3.<b>utcMondays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeMonday](#timeMonday).[range](#interval_range) and [d3.utcMonday](#timeMonday).[range](#interval_range).
 
-<a name="timeTuesdays" href="#timeTuesdays">#</a> d3.<b>timeTuesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeTuesdays">#</a> d3.<b>utcTuesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeTuesdays" href="#timeTuesdays">#</a> d3.<b>timeTuesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeTuesdays">#</a> d3.<b>utcTuesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeTuesday](#timeTuesday).[range](#interval_range) and [d3.utcTuesday](#timeTuesday).[range](#interval_range).
 
-<a name="timeWednesdays" href="#timeWednesdays">#</a> d3.<b>timeWednesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeWednesdays">#</a> d3.<b>utcWednesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeWednesdays" href="#timeWednesdays">#</a> d3.<b>timeWednesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeWednesdays">#</a> d3.<b>utcWednesdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeWednesday](#timeWednesday).[range](#interval_range) and [d3.utcWednesday](#timeWednesday).[range](#interval_range).
 
-<a name="timeThursdays" href="#timeThursdays">#</a> d3.<b>timeThursdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeThursdays">#</a> d3.<b>utcThursdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeThursdays" href="#timeThursdays">#</a> d3.<b>timeThursdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeThursdays">#</a> d3.<b>utcThursdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeThursday](#timeThursday).[range](#interval_range) and [d3.utcThursday](#timeThursday).[range](#interval_range).
 
-<a name="timeFridays" href="#timeFridays">#</a> d3.<b>timeFridays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeFridays">#</a> d3.<b>utcFridays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeFridays" href="#timeFridays">#</a> d3.<b>timeFridays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeFridays">#</a> d3.<b>utcFridays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeFriday](#timeFriday).[range](#interval_range) and [d3.utcFriday](#timeFriday).[range](#interval_range).
 
-<a name="timeSaturdays" href="#timeSaturdays">#</a> d3.<b>timeSaturdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/week.js)
-<br><a href="#timeSaturdays">#</a> d3.<b>utcSaturdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcWeek.js)
+<a name="timeSaturdays" href="#timeSaturdays">#</a> d3.<b>timeSaturdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/week.js)
+<br><a href="#timeSaturdays">#</a> d3.<b>utcSaturdays</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcWeek.js)
 
 Aliases for [d3.timeSaturday](#timeSaturday).[range](#interval_range) and [d3.utcSaturday](#timeSaturday).[range](#interval_range).
 
-<a name="timeMonths" href="#timeMonths">#</a> d3.<b>timeMonths</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/month.js)
-<br><a href="#timeMonths">#</a> d3.<b>utcMonths</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcMonth.js)
+<a name="timeMonths" href="#timeMonths">#</a> d3.<b>timeMonths</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/month.js)
+<br><a href="#timeMonths">#</a> d3.<b>utcMonths</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcMonth.js)
 
 Aliases for [d3.timeMonth](#timeMonth).[range](#interval_range) and [d3.utcMonth](#timeMonth).[range](#interval_range).
 
-<a name="timeYears" href="#timeYears">#</a> d3.<b>timeYears</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/year.js)
-<br><a href="#timeYears">#</a> d3.<b>utcYears</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/master/src/utcYear.js)
+<a name="timeYears" href="#timeYears">#</a> d3.<b>timeYears</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/year.js)
+<br><a href="#timeYears">#</a> d3.<b>utcYears</b>(<i>start</i>, <i>stop</i>[, <i>step</i>]) · [Source](https://github.com/d3/d3-time/blob/main/src/utcYear.js)
 
@@ -350,11 +352,11 @@ Aliases for [d3.timeYear](#timeYear).[range](#interval_range) and [d3.utcYear](#timeYear).[range](#interval_range).
 
-<a name="timeTicks" href="#timeTicks">#</a> d3.<b>timeTicks</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/ticks.js)
+<a name="timeTicks" href="#timeTicks">#</a> d3.<b>timeTicks</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/ticks.js)
 
 Equivalent to [d3.utcTicks](#utcTicks), but in local time.
 
-<a name="timeTickInterval" href="#timeTickInterval">#</a> d3.<b>timeTickInterval</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/ticks.js)
+<a name="timeTickInterval" href="#timeTickInterval">#</a> d3.<b>timeTickInterval</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/ticks.js)
 
 Returns the time interval that would be used by [d3.timeTicks](#timeTicks) given the same arguments.
 
-<a name="utcTicks" href="#utcTicks">#</a> d3.<b>utcTicks</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/ticks.js)
+<a name="utcTicks" href="#utcTicks">#</a> d3.<b>utcTicks</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/ticks.js)
 
@@ -382,3 +384,3 @@ Returns an array of approximately *count* dates at regular intervals between *start* and *stop* (inclusive). If *stop* is before *start*, dates are returned in reverse chronological order; otherwise dates are returned in chronological order. The following UTC time intervals are considered:
 
-Multiples of milliseconds (for small ranges) and years (for large ranges) are also considered, following the rules of [d3.ticks](https://github.com/d3/d3-array/blob/master/README.md#ticks). The interval producing the number of dates that is closest to *count* is used. For example:
+Multiples of milliseconds (for small ranges) and years (for large ranges) are also considered, following the rules of [d3.ticks](https://github.com/d3/d3-array/blob/main/README.md#ticks). The interval producing the number of dates that is closest to *count* is used. For example:
 
@@ -394,4 +396,4 @@ ```js
 
-<a name="utcTickInterval" href="#utcTickInterval">#</a> d3.<b>utcTickInterval</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/master/src/ticks.js)
+<a name="utcTickInterval" href="#utcTickInterval">#</a> d3.<b>utcTickInterval</b>(<i>start</i>, <i>stop</i>, <i>count</i>) · [Source](https://github.com/d3/d3-time/blob/main/src/ticks.js)
 
 Returns the time interval that would be used by [d3.utcTicks](#utcTicks) given the same arguments. If there is no associated interval, such as when *start* or *stop* is invalid, returns null.

src/day.js

@@ -1,5 +0,5 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 import {durationDay, durationMinute} from "./duration.js";
 
-var day = interval(
+export const timeDay = timeInterval(
   date => date.setHours(0, 0, 0, 0),
@@ -11,3 +11,26 @@ (date, step) => date.setDate(date.getDate() + step),
 
-export default day;
-export var days = day.range;
+export const timeDays = timeDay.range;
+
+export const utcDay = timeInterval((date) => {
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+  return (end - start) / durationDay;
+}, (date) => {
+  return date.getUTCDate() - 1;
+});
+
+export const utcDays = utcDay.range;
+
+export const unixDay = timeInterval((date) => {
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCDate(date.getUTCDate() + step);
+}, (start, end) => {
+  return (end - start) / durationDay;
+}, (date) => {
+  return Math.floor(date / durationDay);
+});
+
+export const unixDays = unixDay.range;

src/hour.js

@@ -1,15 +0,26 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 import {durationHour, durationMinute, durationSecond} from "./duration.js";
 
-var hour = interval(function(date) {
+export const timeHour = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationHour);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationHour;
-}, function(date) {
+}, (date) => {
   return date.getHours();
 });
 
-export default hour;
-export var hours = hour.range;
+export const timeHours = timeHour.range;
+
+export const utcHour = timeInterval((date) => {
+  date.setUTCMinutes(0, 0, 0);
+}, (date, step) => {
+  date.setTime(+date + step * durationHour);
+}, (start, end) => {
+  return (end - start) / durationHour;
+}, (date) => {
+  return date.getUTCHours();
+});
+
+export const utcHours = utcHour.range;

src/index.js

 export {
-  default as timeInterval
+  timeInterval
 } from "./interval.js";
 
 export {
-  default as timeMillisecond,
-  milliseconds as timeMilliseconds,
-  default as utcMillisecond,
-  milliseconds as utcMilliseconds
+  millisecond as utcMillisecond,
+  milliseconds as utcMilliseconds,
+  millisecond as timeMillisecond,
+  milliseconds as timeMilliseconds
 } from "./millisecond.js";
 
 export {
-  default as timeSecond,
-  seconds as timeSeconds,
-  default as utcSecond,
-  seconds as utcSeconds
+  second as utcSecond,
+  seconds as utcSeconds,
+  second as timeSecond,
+  seconds as timeSeconds
 } from "./second.js";
 
 export {
-  default as timeMinute,
-  minutes as timeMinutes
+  timeMinute,
+  timeMinutes,
+  utcMinute,
+  utcMinutes
 } from "./minute.js";
 
 export {
-  default as timeHour,
-  hours as timeHours
+  timeHour,
+  timeHours,
+  utcHour,
+  utcHours
 } from "./hour.js";
 
 export {
-  default as timeDay,
-  days as timeDays
+  timeDay,
+  timeDays,
+  utcDay,
+  utcDays,
+  unixDay,
+  unixDays
 } from "./day.js";
 
 export {
-  sunday as timeWeek,
-  sundays as timeWeeks,
-  sunday as timeSunday,
-  sundays as timeSundays,
-  monday as timeMonday,
-  mondays as timeMondays,
-  tuesday as timeTuesday,
-  tuesdays as timeTuesdays,
-  wednesday as timeWednesday,
-  wednesdays as timeWednesdays,
-  thursday as timeThursday,
-  thursdays as timeThursdays,
-  friday as timeFriday,
-  fridays as timeFridays,
-  saturday as timeSaturday,
-  saturdays as timeSaturdays
+  timeSunday as timeWeek,
+  timeSundays as timeWeeks,
+  timeSunday,
+  timeSundays,
+  timeMonday,
+  timeMondays,
+  timeTuesday,
+  timeTuesdays,
+  timeWednesday,
+  timeWednesdays,
+  timeThursday,
+  timeThursdays,
+  timeFriday,
+  timeFridays,
+  timeSaturday,
+  timeSaturdays,
+  utcSunday as utcWeek,
+  utcSundays as utcWeeks,
+  utcSunday,
+  utcSundays,
+  utcMonday,
+  utcMondays,
+  utcTuesday,
+  utcTuesdays,
+  utcWednesday,
+  utcWednesdays,
+  utcThursday,
+  utcThursdays,
+  utcFriday,
+  utcFridays,
+  utcSaturday,
+  utcSaturdays
 } from "./week.js";
 
 export {
-  default as timeMonth,
-  months as timeMonths
+  timeMonth,
+  timeMonths,
+  utcMonth,
+  utcMonths
 } from "./month.js";
 
 export {
-  default as timeYear,
-  years as timeYears
+  timeYear,
+  timeYears,
+  utcYear,
+  utcYears
 } from "./year.js";
 
 export {
-  default as utcMinute,
-  utcMinutes as utcMinutes
-} from "./utcMinute.js";
-
-export {
-  default as utcHour,
-  utcHours as utcHours
-} from "./utcHour.js";
-
-export {
-  default as utcDay,
-  utcDays as utcDays
-} from "./utcDay.js";
-
-export {
-  utcSunday as utcWeek,
-  utcSundays as utcWeeks,
-  utcSunday as utcSunday,
-  utcSundays as utcSundays,
-  utcMonday as utcMonday,
-  utcMondays as utcMondays,
-  utcTuesday as utcTuesday,
-  utcTuesdays as utcTuesdays,
-  utcWednesday as utcWednesday,
-  utcWednesdays as utcWednesdays,
-  utcThursday as utcThursday,
-  utcThursdays as utcThursdays,
-  utcFriday as utcFriday,
-  utcFridays as utcFridays,
-  utcSaturday as utcSaturday,
-  utcSaturdays as utcSaturdays
-} from "./utcWeek.js";
-
-export {
-  default as utcMonth,
-  utcMonths as utcMonths
-} from "./utcMonth.js";
-
-export {
-  default as utcYear,
-  utcYears as utcYears
-} from "./utcYear.js";
-
-export {
   utcTicks,
@@ -109,0 +93,0 @@ utcTickInterval,

src/interval.js

@@ -1,5 +0,4 @@
-var t0 = new Date,
-    t1 = new Date;
+const t0 = new Date, t1 = new Date;
 
-export default function newInterval(floori, offseti, count, field) {
+export function timeInterval(floori, offseti, count, field) {
 
@@ -10,25 +9,25 @@ function interval(date) {
 
-  interval.floor = function(date) {
+  interval.floor = (date) => {
     return floori(date = new Date(+date)), date;
   };
 
-  interval.ceil = function(date) {
+  interval.ceil = (date) => {
     return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
   };
 
-  interval.round = function(date) {
-    var d0 = interval(date),
-        d1 = interval.ceil(date);
+  interval.round = (date) => {
+    const d0 = interval(date), d1 = interval.ceil(date);
     return date - d0 < d1 - date ? d0 : d1;
   };
 
-  interval.offset = function(date, step) {
+  interval.offset = (date, step) => {
     return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
   };
 
-  interval.range = function(start, stop, step) {
-    var range = [], previous;
+  interval.range = (start, stop, step) => {
+    const range = [];
     start = interval.ceil(start);
     step = step == null ? 1 : Math.floor(step);
     if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
+    let previous;
     do range.push(previous = new Date(+start)), offseti(start, step), floori(start);
@@ -39,6 +38,6 @@ while (previous < start && start < stop);
 
-  interval.filter = function(test) {
-    return newInterval(function(date) {
+  interval.filter = (test) => {
+    return timeInterval((date) => {
       if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
-    }, function(date, step) {
+    }, (date, step) => {
       if (date >= date) {
@@ -55,3 +54,3 @@ if (step < 0) while (++step <= 0) {
   if (count) {
-    interval.count = function(start, end) {
+    interval.count = (start, end) => {
       t0.setTime(+start), t1.setTime(+end);
@@ -62,3 +61,3 @@ floori(t0), floori(t1);
 
-    interval.every = function(step) {
+    interval.every = (step) => {
       step = Math.floor(step);
@@ -68,4 +67,4 @@ return !isFinite(step) || !(step > 0) ? null
           : interval.filter(field
-              ? function(d) { return field(d) % step === 0; }
-              : function(d) { return interval.count(0, d) % step === 0; });
+              ? (d) => field(d) % step === 0
+              : (d) => interval.count(0, d) % step === 0);
     };
@@ -72,0 +71,0 @@ }

src/millisecond.js

@@ -1,8 +0,8 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 
-var millisecond = interval(function() {
+export const millisecond = timeInterval(() => {
   // noop
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step);
-}, function(start, end) {
+}, (start, end) => {
   return end - start;
@@ -12,11 +12,11 @@ });
 // An optimized implementation for this simple case.
-millisecond.every = function(k) {
+millisecond.every = (k) => {
   k = Math.floor(k);
   if (!isFinite(k) || !(k > 0)) return null;
   if (!(k > 1)) return millisecond;
-  return interval(function(date) {
+  return timeInterval((date) => {
     date.setTime(Math.floor(date / k) * k);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setTime(+date + step * k);
-  }, function(start, end) {
+  }, (start, end) => {
     return (end - start) / k;
@@ -26,3 +26,2 @@ });
 
-export default millisecond;
-export var milliseconds = millisecond.range;
+export const milliseconds = millisecond.range;

src/minute.js

@@ -1,15 +0,26 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 import {durationMinute, durationSecond} from "./duration.js";
 
-var minute = interval(function(date) {
+export const timeMinute = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond);
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationMinute);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationMinute;
-}, function(date) {
+}, (date) => {
   return date.getMinutes();
 });
 
-export default minute;
-export var minutes = minute.range;
+export const timeMinutes = timeMinute.range;
+
+export const utcMinute = timeInterval((date) => {
+  date.setUTCSeconds(0, 0);
+}, (date, step) => {
+  date.setTime(+date + step * durationMinute);
+}, (start, end) => {
+  return (end - start) / durationMinute;
+}, (date) => {
+  return date.getUTCMinutes();
+});
+
+export const utcMinutes = utcMinute.range;

src/month.js

@@ -1,15 +0,27 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 
-var month = interval(function(date) {
+export const timeMonth = timeInterval((date) => {
   date.setDate(1);
   date.setHours(0, 0, 0, 0);
-}, function(date, step) {
+}, (date, step) => {
   date.setMonth(date.getMonth() + step);
-}, function(start, end) {
+}, (start, end) => {
   return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
-}, function(date) {
+}, (date) => {
   return date.getMonth();
 });
 
-export default month;
-export var months = month.range;
+export const timeMonths = timeMonth.range;
+
+export const utcMonth = timeInterval((date) => {
+  date.setUTCDate(1);
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCMonth(date.getUTCMonth() + step);
+}, (start, end) => {
+  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, (date) => {
+  return date.getUTCMonth();
+});
+
+export const utcMonths = utcMonth.range;

src/second.js

@@ -1,15 +0,14 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 import {durationSecond} from "./duration.js";
 
-var second = interval(function(date) {
+export const second = timeInterval((date) => {
   date.setTime(date - date.getMilliseconds());
-}, function(date, step) {
+}, (date, step) => {
   date.setTime(+date + step * durationSecond);
-}, function(start, end) {
+}, (start, end) => {
   return (end - start) / durationSecond;
-}, function(date) {
+}, (date) => {
   return date.getUTCSeconds();
 });
 
-export default second;
-export var seconds = second.range;
+export const seconds = second.range;

src/ticks.js

 import {bisector, tickStep} from "d3-array";
 import {durationDay, durationHour, durationMinute, durationMonth, durationSecond, durationWeek, durationYear} from "./duration.js";
-import millisecond from "./millisecond.js";
-import second from "./second.js";
-import minute from "./minute.js";
-import hour from "./hour.js";
-import day from "./day.js";
-import {sunday as week} from "./week.js";
-import month from "./month.js";
-import year from "./year.js";
-import utcMinute from "./utcMinute.js";
-import utcHour from "./utcHour.js";
-import utcDay from "./utcDay.js";
-import {utcSunday as utcWeek} from "./utcWeek.js";
-import utcMonth from "./utcMonth.js";
-import utcYear from "./utcYear.js";
+import {millisecond} from "./millisecond.js";
+import {second} from "./second.js";
+import {timeMinute, utcMinute} from "./minute.js";
+import {timeHour, utcHour} from "./hour.js";
+import {timeDay, unixDay} from "./day.js";
+import {timeSunday, utcSunday} from "./week.js";
+import {timeMonth, utcMonth} from "./month.js";
+import {timeYear, utcYear} from "./year.js";
 
@@ -61,5 +55,5 @@ function ticker(year, month, week, day, hour, minute) {
 
-const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcWeek, utcDay, utcHour, utcMinute);
-const [timeTicks, timeTickInterval] = ticker(year, month, week, day, hour, minute);
+const [utcTicks, utcTickInterval] = ticker(utcYear, utcMonth, utcSunday, unixDay, utcHour, utcMinute);
+const [timeTicks, timeTickInterval] = ticker(timeYear, timeMonth, timeSunday, timeDay, timeHour, timeMinute);
 
 export {utcTicks, utcTickInterval, timeTicks, timeTickInterval};

src/week.js

@@ -1,11 +0,11 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 import {durationMinute, durationWeek} from "./duration.js";
 
-function weekday(i) {
-  return interval(function(date) {
+function timeWeekday(i) {
+  return timeInterval((date) => {
     date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
     date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setDate(date.getDate() + step * 7);
-  }, function(start, end) {
+  }, (start, end) => {
     return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
@@ -15,16 +15,43 @@ });
 
-export var sunday = weekday(0);
-export var monday = weekday(1);
-export var tuesday = weekday(2);
-export var wednesday = weekday(3);
-export var thursday = weekday(4);
-export var friday = weekday(5);
-export var saturday = weekday(6);
+export const timeSunday = timeWeekday(0);
+export const timeMonday = timeWeekday(1);
+export const timeTuesday = timeWeekday(2);
+export const timeWednesday = timeWeekday(3);
+export const timeThursday = timeWeekday(4);
+export const timeFriday = timeWeekday(5);
+export const timeSaturday = timeWeekday(6);
 
-export var sundays = sunday.range;
-export var mondays = monday.range;
-export var tuesdays = tuesday.range;
-export var wednesdays = wednesday.range;
-export var thursdays = thursday.range;
-export var fridays = friday.range;
-export var saturdays = saturday.range;
+export const timeSundays = timeSunday.range;
+export const timeMondays = timeMonday.range;
+export const timeTuesdays = timeTuesday.range;
+export const timeWednesdays = timeWednesday.range;
+export const timeThursdays = timeThursday.range;
+export const timeFridays = timeFriday.range;
+export const timeSaturdays = timeSaturday.range;
+
+function utcWeekday(i) {
+  return timeInterval((date) => {
+    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
+    date.setUTCHours(0, 0, 0, 0);
+  }, (date, step) => {
+    date.setUTCDate(date.getUTCDate() + step * 7);
+  }, (start, end) => {
+    return (end - start) / durationWeek;
+  });
+}
+
+export const utcSunday = utcWeekday(0);
+export const utcMonday = utcWeekday(1);
+export const utcTuesday = utcWeekday(2);
+export const utcWednesday = utcWeekday(3);
+export const utcThursday = utcWeekday(4);
+export const utcFriday = utcWeekday(5);
+export const utcSaturday = utcWeekday(6);
+
+export const utcSundays = utcSunday.range;
+export const utcMondays = utcMonday.range;
+export const utcTuesdays = utcTuesday.range;
+export const utcWednesdays = utcWednesday.range;
+export const utcThursdays = utcThursday.range;
+export const utcFridays = utcFriday.range;
+export const utcSaturdays = utcSaturday.range;

src/year.js

@@ -1,11 +0,11 @@
-import interval from "./interval.js";
+import {timeInterval} from "./interval.js";
 
-var year = interval(function(date) {
+export const timeYear = timeInterval((date) => {
   date.setMonth(0, 1);
   date.setHours(0, 0, 0, 0);
-}, function(date, step) {
+}, (date, step) => {
   date.setFullYear(date.getFullYear() + step);
-}, function(start, end) {
+}, (start, end) => {
   return end.getFullYear() - start.getFullYear();
-}, function(date) {
+}, (date) => {
   return date.getFullYear();
@@ -15,8 +15,8 @@ });
 // An optimized implementation for this simple case.
-year.every = function(k) {
-  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : interval(function(date) {
+timeYear.every = (k) => {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
     date.setFullYear(Math.floor(date.getFullYear() / k) * k);
     date.setMonth(0, 1);
     date.setHours(0, 0, 0, 0);
-  }, function(date, step) {
+  }, (date, step) => {
     date.setFullYear(date.getFullYear() + step * k);
@@ -26,3 +26,26 @@ });
 
-export default year;
-export var years = year.range;
+export const timeYears = timeYear.range;
+
+export const utcYear = timeInterval((date) => {
+  date.setUTCMonth(0, 1);
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCFullYear(date.getUTCFullYear() + step);
+}, (start, end) => {
+  return end.getUTCFullYear() - start.getUTCFullYear();
+}, (date) => {
+  return date.getUTCFullYear();
+});
+
+// An optimized implementation for this simple case.
+utcYear.every = (k) => {
+  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : timeInterval((date) => {
+    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
+    date.setUTCMonth(0, 1);
+    date.setUTCHours(0, 0, 0, 0);
+  }, (date, step) => {
+    date.setUTCFullYear(date.getUTCFullYear() + step * k);
+  });
+};
+
+export const utcYears = utcYear.range;

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