Moment.js is a javascript date library that helps create, manipulate, and format dates without extending the `Date` prototype.
The moment npm package is a JavaScript library for parsing, validating, manipulating, and formatting dates. It is widely used for handling dates and times in Node.js and browser applications.
Parsing
Parse a date string into a moment object.
moment('2023-04-05')Validation
Check if a date is valid.
moment('2023-04-05').isValid()Manipulation
Manipulate dates by adding time to the current date.
moment().add(7, 'days')Formatting
Format a moment date object into a string in a specified format.
moment().format('YYYY-MM-DD')Query
Query dates to compare them.
moment().isBefore('2023-12-25')Provides a collection of simple, pure functions for manipulating JavaScript dates. It is modular, allowing you to pick and choose which functions you need, and is generally considered to be a lighter-weight alternative to moment.
Created by one of the original Moment.js team members, Luxon is a modern library for working with dates and times. It offers a fluent API and aims to have a smaller footprint than moment.
Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. It is lightweight and its API is designed to be familiar to Moment.js users.
A lightweight javascript date library for parsing, manipulating, and formatting dates.
npm install moment
To contribute, fork the library and install these npm packages.
npm install jshint uglify-js nodeunit
You can add tests to the files in /test/moment or add a new test file if you are adding a new feature.
To run the tests, do make test to run all tests, make test-moment to test the core library, and make test-lang to test all the languages.
To check the filesize, you can use make size.
To minify all the files, use make moment to minify moment, make langs to minify all the lang files, or just make to minfy everything.
If your code passes the unit tests (including the ones you wrote), submit a pull request.
The folks over at date.js.
Everyone who helped with php.js date.
Ryan McGeary for his work on the jQuery timeago plugin.
Moment.js is freely distributable under the terms of the MIT license.
Added moment.fn.toDate as a replacement for moment.fn.native.
Added moment.fn.sod and moment.fn.eod to get the start and end of day.
Various bugfixes.
Added support for parsing month names in the current language.
Added escape blocks for parsing tokens.
Added moment.fn.calendar to format strings like 'Today 2:30 PM', 'Tomorrow 1:25 AM', and 'Last Sunday 4:30 AM'.
Added moment.fn.day as a setter.
Various bugfixes
Added timezones to parser and formatter.
Added moment.fn.isDST.
Added moment.fn.zone to get the timezone offset in minutes.
Various bugfixes
Added time specific diffs (months, days, hours, etc)
Added moment.fn.format localized masks. 'L LL LLL LLLL' issue 29
Fixed issue 31.
Added moment.version to get the current version.
Removed window !== undefined when checking if module exists to support browserify. issue 25
Added convenience methods for getting and setting date parts.
Added better support for moment.add().
Added better lang support in NodeJS.
Renamed library from underscore.date to Moment.js
Added Portuguese, Italian, and French language support
Added _date.lang() support. Added support for passing multiple formats to try to parse a date. _date("07-10-1986", ["MM-DD-YYYY", "YYYY-MM-DD"]); Made parse from string and single format 25% faster.
Buxfix for issue 8 and issue 9.
Buxfix for issue 5.
Dropped the redundant _date.date() in favor of _date().
Removed _date.now(), as it is a duplicate of _date() with no parameters.
Removed _date.isLeapYear(yearNuumber). Use _date([yearNumber]).isLeapYear() instead.
Exposed customization options through the _date.relativeTime, _date.weekdays, _date.weekdaysShort, _date.months, _date.monthsShort, and _date.ordinal variables instead of the _date.customize() function.
Added date input formats for input strings.
Added underscore.date to npm. Removed dependancies on underscore.
Added 'z' and 'zz' to _.date().format(). Cleaned up some redundant code to trim off some bytes.
Cleaned up the namespace. Moved all date manipulation and display functions to the _.date() object.
Switched to the Underscore methodology of not mucking with the native objects' prototypes. Made chaining possible.
Changed date names to be a more pseudo standardized 'dddd, MMMM Do YYYY, h:mm:ss a'.
Added Date.prototype functions add, subtract, isdst, and isleapyear.
Changed function names to be more concise. Changed date format from php date format to custom format.
Initial release
FAQs
Parse, validate, manipulate, and display dates
The npm package moment receives a total of 7,737,533 weekly downloads. As such, moment popularity was classified as popular.
We found that moment demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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