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Parse, validate, manipulate, and display dates in javascript.
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NPM version NPM downloads MIT License Build Status Coverage Status FOSSA Status SemVer compatibility

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


Port to ECMAScript 6 (version 2.10.0)

Moment 2.10.0 does not bring any new features, but the code is now written in ECMAScript 6 modules and placed inside src/. Previously moment.js, locale/*.js and test/moment/*.js, test/locale/*.js contained the source of the project. Now the source is in src/, temporary build (ECMAScript 5) files are placed under build/umd/ (for running tests during development), and the moment.js and locale/*.js files are updated only on release.

If you want to use a particular revision of the code, make sure to run grunt transpile update-index, so moment.js and locales/*.js are synced with src/*. We might place that in a commit hook in the future.

Upgrading to 2.0.0

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


Contributing Open Source Helpers

We're looking for co-maintainers! If you want to become a master of time please write to ichernev.

In addition to contributing code, you can help to triage issues. This can include reproducing bug reports, or asking for vital information such as version numbers or reproduction instructions. If you would like to start triaging issues, one easy way to get started is to subscribe to moment/moment on CodeTriage.

Frequently asked questions



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

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