A lightweight javascript date library for parsing, validating, manipulating, and formatting dates.

Documentation

Upgrading to 2.0.0

There are a number of small backwards incompatible changes with version 2.0.0.

See them and their descriptions here

Changed language ordinal method to return the number + ordinal instead of just the ordinal.

Changed two digit year parsing cutoff to match strptime.

Removed moment#sod and moment#eod in favor of moment#startOf and moment#endOf.

Removed moment.humanizeDuration() in favor of moment.duration().humanize().

Removed the lang data objects from the top level namespace.

Duplicate Date passed to moment() instead of referencing it.

Travis Build Status

Develop

Master

Upgrading to 1.6.0

There are a few things being deprecated in the 1.6.0 release.

1. The format tokens z and zz (timezone abbreviations like EST CST MST etc) will no longer be supported. Due to inconsistent browser support, we are unable to consistently produce this value. See this issue for more background.

2. The method moment.fn.native is deprecated in favor of moment.fn.toDate. There continue to be issues with Google Closure Compiler throwing errors when using native, even in valid instances.

3. The way to customize am/pm strings is being changed. This would only affect you if you created a custom language file. For more information, see this issue.

Changelog

2.0.0 See changelog

Added short form localized tokens.

Added ability to define language a string should be parsed in.

Added support for reversed add/subtract arguments.

Added support for endOf('week') and startOf('week').

Fixed the logic for moment#diff(Moment, 'months') and moment#diff(Moment, 'years')

moment#diff now floors instead of rounds.

Normalized moment#toString.

Added isSame, isAfter, and isBefore methods.

Added better week support.

Added moment#toJSON

Bugfix: Fixed parsing of first century dates

Bugfix: Parsing 10Sep2001 should work as expected

Bugfix: Fixed wierdness with moment.utc() parsing.

Changed language ordinal method to return the number + ordinal instead of just the ordinal.

Changed two digit year parsing cutoff to match strptime.

Removed moment#sod and moment#eod in favor of moment#startOf and moment#endOf.

Removed moment.humanizeDuration() in favor of moment.duration().humanize().

Removed the lang data objects from the top level namespace.

Duplicate Date passed to moment() instead of referencing it.

1.7.2 See discussion

Bugfixes

1.7.1 See discussion

Bugfixes

1.7.0 See discussion

Added moment.fn.endOf() and moment.fn.startOf().

Added validation via moment.fn.isValid().

Made formatting method 3x faster. http://jsperf.com/momentjs-cached-format-functions

Add support for month/weekday callbacks in moment.fn.format()

Added instance specific languages.

Added two letter weekday abbreviations with the formatting token dd.

Various language updates.

Various bugfixes.

1.6.0 See discussion

Added Durations.

Revamped parser to support parsing non-separated strings (YYYYMMDD vs YYYY-MM-DD).

Added support for millisecond parsing and formatting tokens (S SS SSS)

Added a getter for moment.lang()

Various bugfixes.

1.5.0 See milestone

Added UTC mode.

Added automatic ISO8601 parsing.

Various bugfixes.

1.4.0 See milestone

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.

1.3.0 See milestone

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

1.2.0 See milestone

Added timezones to parser and formatter.

Added moment.fn.isDST.

Added moment.fn.zone to get the timezone offset in minutes.

1.1.2 See milestone

Various bugfixes

1.1.1 See milestone

Added time specific diffs (months, days, hours, etc)

1.1.0

Added moment.fn.format localized masks. 'L LL LLL LLLL' issue 29

Fixed issue 31.

1.0.1

Added moment.version to get the current version.

Removed window !== undefined when checking if module exists to support browserify. issue 25

1.0.0

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

0.6.1

Added Portuguese, Italian, and French language support

0.6.0

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.

0.5.2

Bugfix for issue 8 and issue 9.

0.5.1

Bugfix for issue 5.

0.5.0

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(yearNumber). 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.

0.4.1

Added date input formats for input strings.

0.4.0

Added underscore.date to npm. Removed dependencies on underscore.

0.3.2

Added 'z' and 'zz' to _.date().format(). Cleaned up some redundant code to trim off some bytes.

0.3.1

Cleaned up the namespace. Moved all date manipulation and display functions to the _.date() object.

0.3.0

Switched to the Underscore methodology of not mucking with the native objects' prototypes. Made chaining possible.

0.2.1

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.

0.2.0

Changed function names to be more concise. Changed date format from php date format to custom format.

0.1.0

Initial release

License

Moment.js is freely distributable under the terms of the MIT license.

Copyright (c) 2011-2012 Tim Wood

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.