Moment was designed to work both in the browser and in Node.js.
All code should work in both of these environments, and all unit tests are run in both of these environments.
Currently the following browsers are used for the ci system: Chrome on Windows XP, IE 8, 9, and 10 on Windows 7, IE 11 on Windows 10, latest Firefox on Linux, and latest Safari on OSX 10.8 and 10.11.
If you want to try the sample codes below, just open your browser's console and enter them.
npm install moment
var moment = require('moment'); moment().format();
Note: In 2.4.0, the globally exported moment object was deprecated. It will be removed in next major release.
<script src="moment.js"></script>
<script>
moment().format();
</script> Moment.js is available on cdnjs.com and on jsDelivr.
bower install --save moment
Notable files are moment.js, locale/*.js and min/moment-with-locales.js.
We strongly recommend reading this if you plan to use moment with Require.js. Also upgrade to 2.14.0 or above for best experience.
As a start, you might have aquired moment through bower or node_modules or anything else that places moment.js together with a locales directory in a base folder. Then you should use a tool like adapt-pkg-main, or manually -- using packages config.
requirejs.config({
packages: [{
name: 'moment',
// This location is relative to baseUrl. Choose bower_components
// or node_modules, depending on how moment was installed.
location: '[bower_components|node_modules]/moment'
main: 'moment'
}]
}); With the above setup, you can require the core with moment and de locale with moment/locale/de.
// only needing core define(['moment'], function (moment) { console.log(moment().format('LLLL')); // 'Friday, June 24, 2016 1:42 AM' }); // core with single locale define(['moment', 'moment/locale/de'], function (moment) { moment.locale('de'); console.log(moment().format('LLLL')); // 'Freitag, 24. Juni 2016 01:42' }); // core with all locales define(['moment/min/moment-with-locales'], function (moment) { moment.locale('de'); console.log(moment().format('LLLL')); // 'Freitag, 24. Juni 2016 01:42' }); // async load locale define(['require', 'moment'], function(require, moment) { // Inside some module after the locale is detected. This is the // case where the locale is not known before module load time. require(['moment/locale/de'], function(localeModule) { // here the locale is loaded, but not yet in use console.log(moment().format('LLLL')); // 'Friday, June 24, 2016 1:42 AM' moment.locale('de'); // Use moment now that the locale has been properly set. console.log(moment().format('LLLL')); // 'Freitag, 24. Juni 2016 01:42' }) });
For more complicated use cases please read excellent explanation by @jrburke.
Moment will still create a moment global, which is useful to plugins and other third-party code. If you wish to squash that global, use the noGlobal option on the module config.
require.config({
config: {
moment: {
noGlobal: true
}
}
}); If you don't specify noGlobal then the globally exported moment will print a deprecation warning. From next major release you'll have to export it yourself if you want that behavior.
For version 2.5.x, in case you use other plugins that rely on Moment but are not AMD-compatible you may need to add wrapShim:
true to your r.js config.
Note: To allow moment.js plugins to be loaded in requirejs environments, moment is created as a named module. Because of this, moment must be loaded exactly as as "moment", using paths to determine the directory. Requiring moment with a path like "vendor\moment" will return undefined.
Note: From version 2.9.0 moment exports itself as an anonymous module, so if you're using only the core (no locales / plugins), then you don't need config if you put it on a non-standard location.
Install-Package Moment.js
meteor / atmosphere / momentjs:moment
meteor add momentjs:moment
npm install moment
var moment = require('moment'); moment().format();
Note: There is a bug that prevents moment.locale from being loaded.
var moment = require('moment'); moment.locale('cs'); console.log(moment.locale()); // en
Use the workaround below
var moment = require('moment'); require('moment/locale/cs'); console.log(moment.locale()); // cs
In order to include all the locales
var moment = require('moment'); require("moment/min/locales.min"); moment.locale('cs'); console.log(moment.locale()); // cs
As of version 2.13.0, Moment includes a typescript definition file.
Install via NPM
npm install moment
Import and use in your Typescript file
import * as moment from 'moment'; let now = moment().format('LLLL');
Note: If you have trouble importing moment, try adding "allowSyntheticDefaultImports": true in compilerOptions in your tsconfig.json file and then use the syntax
import moment from 'moment'; Locale Import
To use moment.locale you first need to import the language you are targeting.
import * as moment from 'moment'; import 'moment/locale/pt-br'; console.log(moment.locale()); // en moment.locale('fr'); console.log(moment.locale()); // en moment.locale('pt-BR'); console.log(moment.locale()); // pt-BR
To load moment, place it in the path specified by your System.config in the baseURL configuration. Then import it into your page.
<script src="system.js"></script> <script> System.config({ baseURL: '/app' }); System.import('moment.js'); </script>
If you need moment to be loaded as global, you can do this with the meta configuration:
System.config({
meta: {
'moment': { format: 'global' }
}
}); Alternatively, to provide Moment as a global to only a specific dependency, you can do this:
System.config({
meta: {
'path/to/global-file.js': {
globals: {
moment: 'moment'
}
}
}
}); To use under Java/Rhino, see these instructions.
To use in Demandware, see these instructions.
If you are having any troubles, the first place to check is the guides.
If you don't find what you are looking for there, try asking a question on Stack Overflow with the momentjs tag.
Note: More than half of the issues seen on Stack Overflow can be answered by this blog post.
You can also use the GitHub issue tracker to find related issues or open a new issue.
In addition, Moment has a Gitter where the internal team is frequently available.
For general troubleshooting help, Stack Overflow is the preferred forum. Moment's maintainers are very active on Stack Overflow, as are several other knowledgeable users. The fastest response will be there.
Instead of modifying the native Date.prototype, Moment.js creates a wrapper for the Date object. To get this wrapper object, simply call moment() with one of the supported input types.
The Moment prototype is exposed through moment.fn. If you want to add your own functions, that is where you would put them.
For ease of reference, any method on the Moment.prototype will be referenced in the docs as moment#method. So Moment.prototype.format == moment.fn.format == moment#format.
moment();
// From 2.14.0 onward, also supported
moment([]);
moment({}); To get the current date and time, just call moment() with no parameters.
var now = moment(); This is essentially the same as calling moment(new Date()).
Note: From version 2.14.0, moment([]) and moment({}) also return now. They used to default to start-of-today before 2.14.0, but that was arbitrary so it was changed.
moment(String);
When creating a moment from a string, we first check if the string matches known ISO 8601 formats, we then check if the string matches the RFC 2822 Date time format before dropping to the fall back of new Date(string) if a known format is not found.
var day = moment("1995-12-25");
Warning: Browser support for parsing strings is inconsistent. Because there is no specification on which formats should be supported, what works in some browsers will not work in other browsers.
For consistent results parsing anything other than ISO 8601 strings, you should use String + Format.
An ISO 8601 string requires a date part.
2013-02-08 # A calendar date part 2013-W06-5 # A week date part 2013-039 # An ordinal date part 20130208 # Basic (short) full date 2013W065 # Basic (short) week, weekday 2013W06 # Basic (short) week only 2013050 # Basic (short) ordinal date
A time part can also be included, separated from the date part by a space or a uppercase T.
2013-02-08T09 # An hour time part separated by a T 2013-02-08 09 # An hour time part separated by a space 2013-02-08 09:30 # An hour and minute time part 2013-02-08 09:30:26 # An hour, minute, and second time part 2013-02-08 09:30:26.123 # An hour, minute, second, and millisecond time part 2013-02-08 24:00:00.000 # hour 24, minute, second, millisecond equal 0 means next day at midnight 20130208T080910,123 # Short date and time up to ms, separated by comma 20130208T080910.123 # Short date and time up to ms 20130208T080910 # Short date and time up to seconds 20130208T0809 # Short date and time up to minutes 20130208T08 # Short date and time, hours only
Any of the date parts can have a time part.
2013-02-08 09 # A calendar date part and hour time part 2013-W06-5 09 # A week date part and hour time part 2013-039 09 # An ordinal date part and hour time part
If a time part is included, an offset from UTC can also be included as +-HH:mm, +-HHmm, +-HH or Z.
2013-02-08 09+07:00 # +-HH:mm 2013-02-08 09-0100 # +-HHmm 2013-02-08 09Z # Z 2013-02-08 09:30:26.123+07:00 # +-HH:mm 2013-02-08 09:30:26.123+07 # +-HH
Note: Automatic cross browser ISO-8601 support was added in version 1.5.0. Support for the week and ordinal formats was added in version 2.3.0.
If a string does not match any of the above formats and is not able to be parsed with Date.parse, moment#isValid will return false.
moment("not a real date").isValid(); // false
Before parsing a RFC 2822 date time the string is cleansed to remove any comments and/or newline characters. The additional characters are legal in the format but add nothing to creating a valid moment instance.
After cleansing, the string is validated in the following space-separated sections, all using the English language:
6 Mar 17 21:22 UT 6 Mar 17 21:22:23 UT 6 Mar 2017 21:22:23 GMT 06 Mar 2017 21:22:23 Z Mon 06 Mar 2017 21:22:23 z Mon, 06 Mar 2017 21:22:23 +0000
Timezone or offset in one of the following formats:
[*] See section 4.3 of the specification for details.
The parser also confirms that the day-of-week (when included) is consistent with the date.
moment(String, String); moment(String, String, String); moment(String, String, Boolean); moment(String, String, String, Boolean);
If you know the format of an input string, you can use that to parse a moment.
moment("12-25-1995", "MM-DD-YYYY");
The parser ignores non-alphanumeric characters, so both of the following will return the same thing.
moment("12-25-1995", "MM-DD-YYYY"); moment("12/25/1995", "MM-DD-YYYY");
The parsing tokens are similar to the formatting tokens used in moment#format.
| Input | Example | Description |
|---|---|---|
YYYY | 2014 | 4 or 2 digit year |
YY | 14 | 2 digit year |
Y | -25 | Year with any number of digits and sign |
Q | 1..4 | Quarter of year. Sets month to first month in quarter. |
M MM | 1..12 | Month number |
MMM MMMM | Jan..December | Month name in locale set by moment.locale()
|
D DD | 1..31 | Day of month |
Do | 1st..31st | Day of month with ordinal |
DDD DDDD | 1..365 | Day of year |
X | 1410715640.579 | Unix timestamp |
x | 1410715640579 | Unix ms timestamp |
YYYY from version 2.10.5 supports 2 digit years, and converts them to a year near 2000 (same as YY).
Y was added in 2.11.1. It will match any number, signed or unsigned. It is useful for years that are not 4 digits or are before the common era. It can be used for any year.
For these, the lowercase tokens use the locale aware week start days, and the uppercase tokens use the ISO week date start days.
| Input | Example | Description |
|---|---|---|
gggg | 2014 | Locale 4 digit week year |
gg | 14 | Locale 2 digit week year |
w ww | 1..53 | Locale week of year |
e | 0..6 | Locale day of week |
ddd dddd | Mon...Sunday | Day name in locale set by moment.locale()
|
GGGG | 2014 | ISO 4 digit week year |
GG | 14 | ISO 2 digit week year |
W WW | 1..53 | ISO week of year |
E | 1..7 | ISO day of week |
| Input | Example | Description |
|---|---|---|
H HH | 0..23 | Hours (24 hour time) |
h hh | 1..12 | Hours (12 hour time used with a A.) |
k kk | 1..24 | Hours (24 hour time from 1 to 24) |
a A | am pm | Post or ante meridiem (Note the one character a p are also considered valid) |
m mm | 0..59 | Minutes |
s ss | 0..59 | Seconds |
S SS SSS | 0..999 | Fractional seconds |
Z ZZ | +12:00 | Offset from UTC as +-HH:mm, +-HHmm, or Z
|
From version 2.10.5: fractional second tokens length 4 up to 9 can parse any number of digits, but will only consider the top 3 (milliseconds). Use if you have the time printed with many fractional digits and want to consume the input.
Note that the number of S characters provided is only relevant when parsing in strict mode. In standard mode, S, SS, SSS, SSSS are all equivalent, and interpreted as fractions of a second. For example, .12 is always 120 milliseconds, passing SS will not cause it to be interpreted as 12 milliseconds.
Locale aware date and time formats are also available using LT LTS L LL LLL
LLLL. They were added in version 2.2.1, except LTS which was added 2.8.4.
Z ZZ were added in version 1.2.0.
S SS SSS were added in version 1.6.0.
X was added in version 2.0.0.
k kk was added in version 2.18.0
Unless you specify a time zone offset, parsing a string will create a date in the current time zone.
moment("2010-10-20 4:30", "YYYY-MM-DD HH:mm"); // parsed as 4:30 local time moment("2010-10-20 4:30 +0000", "YYYY-MM-DD HH:mm Z"); // parsed as 4:30 UTC
If the moment that results from the parsed input does not exist, moment#isValid will return false.
moment("2010 13", "YYYY MM").isValid(); // false (not a real month) moment("2010 11 31", "YYYY MM DD").isValid(); // false (not a real day) moment("2010 2 29", "YYYY MM DD").isValid(); // false (not a leap year) moment("2010 notamonth 29", "YYYY MMM DD").isValid(); // false (not a real month name)
As of version 2.0.0, a locale key can be passed as the third parameter to moment() and moment.utc().
moment('2012 juillet', 'YYYY MMM', 'fr'); moment('2012 July', 'YYYY MMM', 'en');
Moment's parser is very forgiving, and this can lead to undesired/unexpected behavior.
For example, the following behavior can be observed:
moment('2016 is a date', 'YYYY-MM-DD').isValid() //true, 2016 was matched
Previous to 2.13.0 the parser exhibited the following behavior. This has been corrected.
moment('I am spartacus', 'h:hh A').isValid(); //true - the 'am' matches the 'A' flag.
As of version 2.3.0, you may specify a boolean for the last argument to make Moment use strict parsing. Strict parsing requires that the format and input match exactly, including delimeters.
moment('It is 2012-05-25', 'YYYY-MM-DD').isValid(); // true moment('It is 2012-05-25', 'YYYY-MM-DD', true).isValid(); // false moment('2012-05-25', 'YYYY-MM-DD', true).isValid(); // true moment('2012.05.25', 'YYYY-MM-DD', true).isValid(); // false
You can use both locale and strictness.
moment('2012-10-14', 'YYYY-MM-DD', 'fr', true);
Strict parsing is frequently the best parsing option. For more information about choosing strict vs forgiving parsing, see the parsing guide.
By default, two digit years above 68 are assumed to be in the 1900's and years 68 or below are assumed to be in the 2000's. This can be changed by replacing the moment.parseTwoDigitYear method. The only argument of this method is a string containing the two years input by the user, and should return the year as an integer.
moment.parseTwoDigitYear = function(yearString) { return parseInt(yearString) + 2000; }
From version 2.11.0 parsing hmm, Hmm, hmmss and Hmmss is supported:
moment("123", "hmm").format("HH:mm") === "01:23" moment("1234", "hmm").format("HH:mm") === "12:34"
moment(String, String[], String, Boolean);
If you don't know the exact format of an input string, but know it could be one of many, you can use an array of formats.
This is the same as String + Format, only it will try to match the input to multiple formats.
moment("12-25-1995", ["MM-DD-YYYY", "YYYY-MM-DD"]);
Starting in version 2.3.0, Moment uses some simple heuristics to determine which format to use. In order:
moment("29-06-1995", ["MM-DD-YYYY", "DD-MM", "DD-MM-YYYY"]); // uses the last format moment("05-06-1995", ["MM-DD-YYYY", "DD-MM-YYYY"]); // uses the first format
You may also specify a locale and strictness argument. They work the same as the single format case.
moment("29-06-1995", ["MM-DD-YYYY", "DD-MM-YYYY"], 'fr'); // uses 'fr' locale moment("29-06-1995", ["MM-DD-YYYY", "DD-MM-YYYY"], true); // uses strict parsing moment("05-06-1995", ["MM-DD-YYYY", "DD-MM-YYYY"], 'fr', true); // uses 'fr' locale and strict parsing
Note: Parsing multiple formats is considerably slower than parsing a single format. If you can avoid it, it is much faster to parse a single format.
moment(String, moment.CUSTOM_FORMAT, [String], [Boolean]);
moment(String, moment.HTML_FMT.DATETIME_LOCAL, [String], [Boolean]); // from 2.20.0
moment(String, [..., moment.ISO_8601, ...], [String], [Boolean]); ISO-8601 is a standard for time and duration display. Moment already supports parsing iso-8601 strings, but this can be specified explicitly in the format/list of formats when constructing a moment.
To specify iso-8601 parsing use moment.ISO_8601 constant.
moment("2010-01-01T05:06:07", moment.ISO_8601); moment("2010-01-01T05:06:07", ["YYYY", moment.ISO_8601]);
As of version 2.20.0, the following HTML5 formats are available:
| Constant | Format | Example | Input Type |
|---|---|---|---|
moment.HTML5_FMT.DATETIME_LOCAL | YYYY-MM-DDTHH:mm | 2017-12-14T16:34 | <input type="datetime-local" /> |
moment.HTML5_FMT.DATETIME_LOCAL_SECONDS | YYYY-MM-DDTHH:mm:ss | 2017-12-14T16:34:10 | <input type="datetime-local" step="1" /> |
moment.HTML5_FMT.DATETIME_LOCAL_MS | YYYY-MM-DDTHH:mm:ss.SSS | 2017-12-14T16:34:10.234 | <input type="datetime-local" step="0.001" /> |
moment.HTML5_FMT.DATE | YYYY-MM-DD | 2017-12-14 | <input type="date" /> |
moment.HTML5_FMT.TIME | HH:mm | 16:34 | <input type="time" /> |
moment.HTML5_FMT.TIME_SECONDS | HH:mm:ss | 16:34:10 | <input type="time" step="1" /> |
moment.HTML5_FMT.TIME_MS | HH:mm:ss.SSS | 16:34:10.234 | <input type="time" step="0.001" /> |
moment.HTML5_FMT.WEEK | YYYY-[W]WW | 2017-W50 | <input type="week" /> |
moment.HTML5_FMT.MONTH | YYYY-MM | 2017-12 | <input type="month" /> |
moment({unit: value, ...}); moment({ hour:15, minute:10 });
moment({ y :2010, M :3, d :5, h :15, m :10, s :3, ms :123});
moment({ year :2010, month :3, day :5, hour :15, minute :10, second :3, millisecond :123});
moment({ years:2010, months:3, days:5, hours:15, minutes:10, seconds:3, milliseconds:123});
moment({ years:2010, months:3, date:5, hours:15, minutes:10, seconds:3, milliseconds:123});
moment({ years:'2010', months:'3', date:'5', hours:'15', minutes:'10', seconds:'3', milliseconds:'123'}); // from 2.11.0 You can create a moment by specifying some of the units in an object.
Omitted units default to 0 or the current date, month, and year.
day and date key both mean day-of-the-month.
date was added in 2.8.4.
String values (as shown on the last line) are supported from version 2.11.0.
Note that like moment(Array) and new Date(year, month, date), months are 0 indexed.
moment(Number);
Similar to new Date(Number), you can create a moment by passing an integer value representing the number of milliseconds since the Unix Epoch (Jan 1 1970 12AM UTC).
var day = moment(1318781876406);
Note: ECMAScript calls this a "Time Value"
moment.unix(Number)
To create a moment from a Unix timestamp (seconds since the Unix Epoch), use moment.unix(Number).
var day = moment.unix(1318781876);
This is implemented as moment(timestamp * 1000), so partial seconds in the input timestamp are included.
var day = moment.unix(1318781876.721);
Note: Despite Unix timestamps being UTC-based, this function creates a moment object in local mode. If you need UTC, then subsequently call .utc(), as in:
var day = moment.unix(1318781876).utc();
moment(Date);
You can create a Moment with a pre-existing native Javascript Date object.
var day = new Date(2011, 9, 16); var dayWrapper = moment(day);
This clones the Date object; further changes to the Date won't affect the Moment, and vice-versa.
moment(Number[]);
You can create a moment with an array of numbers that mirror the parameters passed to new Date()
[year, month, day, hour, minute, second, millisecond]
moment([2010, 1, 14, 15, 25, 50, 125]); // February 14th, 3:25:50.125 PM
Any value past the year is optional, and will default to the lowest possible number.
moment([2010]); // January 1st moment([2010, 6]); // July 1st moment([2010, 6, 10]); // July 10th
Construction with an array will create a date in the current time zone. To create a date from an array at UTC, use moment.utc(Number[]).
moment.utc([2010, 1, 14, 15, 25, 50, 125]);
Note: Because this mirrors the native Date parameters, months, hours, minutes, seconds, and milliseconds are all zero indexed. Years and days of the month are 1 indexed.
This is often the cause of frustration, especially with months, so take note!
If the date represented by the array does not exist, moment#isValid will return false.
moment([2010, 12]).isValid(); // false (not a real month) moment([2010, 10, 31]).isValid(); // false (not a real day) moment([2010, 1, 29]).isValid(); // false (not a leap year)
moment(String);
Microsoft Web API returns JSON dates in proper ISO-8601 format by default, but older ASP.NET technologies may return dates in JSON as /Date(1198908717056)/ or /Date(1198908717056-0700)/
If a string that matches this format is passed in, it will be parsed correctly.
moment("/Date(1198908717056-0700)/"); // 2007-12-28T23:11:57.056-07:00
moment(Moment);
All moments are mutable. If you want a clone of a moment, you can do so implicitly or explicitly.
Calling moment() on a moment will clone it.
var a = moment([2012]); var b = moment(a); a.year(2000); b.year(); // 2012
Additionally, you can call moment#clone to clone a moment.
var a = moment([2012]); var b = a.clone(); a.year(2000); b.year(); // 2012
moment.utc(); moment.utc(Number); moment.utc(Number[]); moment.utc(String); moment.utc(String, String); moment.utc(String, String[]); moment.utc(String, String, String); moment.utc(String, String, Boolean); moment.utc(String, String, String, Boolean); moment.utc(Moment); moment.utc(Date);
By default, moment parses and displays in local time.
If you want to parse or display a moment in UTC, you can use moment.utc() instead of moment().
This brings us to an interesting feature of Moment.js. UTC mode.
While in UTC mode, all display methods will display in UTC time instead of local time.
moment().format(); // 2013-02-04T10:35:24-08:00 moment.utc().format(); // 2013-02-04T18:35:24+00:00
Additionally, while in UTC mode, all getters and setters will internally use the Date#getUTC* and Date#setUTC* methods instead of the Date#get* and Date#set* methods.
moment.utc().seconds(30).valueOf() === new Date().setUTCSeconds(30); moment.utc().seconds() === new Date().getUTCSeconds();
It is important to note that though the displays differ above, they are both the same moment in time.
var a = moment(); var b = moment.utc(); a.format(); // 2013-02-04T10:35:24-08:00 b.format(); // 2013-02-04T18:35:24+00:00 a.valueOf(); // 1360002924000 b.valueOf(); // 1360002924000
Any moment created with moment.utc() will be in UTC mode, and any moment created with moment() will not.
To switch from UTC to local time, you can use moment#utc or moment#local.
var a = moment.utc([2011, 0, 1, 8]); a.hours(); // 8 UTC a.local(); a.hours(); // 0 PST
moment.parseZone() moment.parseZone(String) moment.parseZone(String, String) moment.parseZone(String, [String]) moment.parseZone(String, String, Boolean) moment.parseZone(String, String, String, Boolean)
Moment's string parsing functions like moment(string) and moment.utc(string) accept offset information if provided, but convert the resulting Moment object to local or UTC time. In contrast, moment.parseZone() parses the string but keeps the resulting Moment object in a fixed-offset timezone with the provided offset in the string.
moment.parseZone("2013-01-01T00:00:00-13:00").utcOffset(); // -780 ("-13:00" in total minutes) moment.parseZone('2013 01 01 05 -13:00', 'YYYY MM DD HH ZZ').utcOffset(); // -780 ("-13:00" in total minutes) moment.parseZone('2013-01-01-13:00', ['DD MM YYYY ZZ', 'YYYY MM DD ZZ']).utcOffset(); // -780 ("-13:00" in total minutes);
It also allows you to pass locale and strictness arguments.
moment.parseZone("2013 01 01 -13:00", 'YYYY MM DD ZZ', true).utcOffset(); // -780 ("-13:00" in total minutes) moment.parseZone("2013-01-01-13:00", 'YYYY MM DD ZZ', true).utcOffset(); // NaN (doesn't pass the strictness check) moment.parseZone("2013 01 01 -13:00", 'YYYY MM DD ZZ', 'fr', true).utcOffset(); // -780 (with locale and strictness argument) moment.parseZone("2013 01 01 -13:00", ['DD MM YYYY ZZ', 'YYYY MM DD ZZ'], 'fr', true).utcOffset(); // -780 (with locale and strictness argument alongside an array of formats)
moment.parseZone is equivalent to parsing the string and using moment#utcOffset to parse the zone.
var s = "2013-01-01T00:00:00-13:00"; moment(s).utcOffset(s);
moment().isValid();
Moment applies stricter initialization rules than the Date constructor.
new Date(2013, 25, 14).toString(); // "Sat Feb 14 2015 00:00:00 GMT-0500 (EST)" moment([2015, 25, 35]).format(); // 'Invalid date'
You can check whether the Moment considers the date invalid using moment#isValid. You can check the metrics used by #isValid using moment#parsingFlags, which returns an object.
The following parsing flags result in an invalid date:
overflow: An overflow of a date field, such as a 13th month, a 32nd day of the month (or a 29th of February on non-leap years), a 367th day of the year, etc. overflow contains the index of the invalid unit to match #invalidAt (see below); -1 means no overflow.invalidMonth: An invalid month name, such as moment('Marbruary', 'MMMM');. Contains the invalid month string itself, or else null.empty: An input string that contains nothing parsable, such as moment('this is nonsense');. Boolean.nullInput: A null input, like moment(null);. Boolean.invalidFormat: An empty list of formats, such as moment('2013-05-25', []). Boolean.userInvalidated: A date created explicitly as invalid, such as moment.invalid(). Boolean.
In addition to the above, As of 2.13.0 the meridiem and parsedDateParts flags work together to determine date validity.
meridiem: Indicates what meridiem (AM/PM) was parsed, if any. String.parsedDateParts: Returns an array of date parts parsed in descending order - i.e. parsedDateParts[0] === year. If no parts are present, but meridiem has value, date is invalid. Array.Additionally, if the Moment is parsed in strict mode, these flags must be empty for the Moment to be valid:
unusedTokens: array of format substrings not found in the input stringunusedInput: array of input substrings not matched to the format stringNote: Moment's concept of validity became more strict and consistent between 2.2 and 2.3. Note: Validity is determined on moment creation. A modified moment (i.e. moment().hour(NaN)) will remain valid.
Additionally, you can use moment#invalidAt to determine which date unit overflowed.
var m = moment("2011-10-10T10:20:90"); m.isValid(); // false m.invalidAt(); // 5 for seconds
The return value has the following meaning:
Note: In case of multiple wrong units the first one is returned (because days validity may depend on month, for example).
If a moment is invalid, it behaves like a NaN in floating point operations.
All of the following produce invalid moments:
invalid.add(unit, value)another.add(invalid)invalid.clone()invalid.diff(another)invalid.endOf(unit)invalid.max(another)another.max(invalid)invalid.min(another)another.min(invalid)invalid.set(unit, value)invalid.startOf(unit)invalid.subtract(unit, value)The following produce a localized version of 'InvalidDate':
invalid.format(anyFmt) results in 'Invalid Date' in the current localeinvalid.from(another)another.from(invalid)invalid.fromNow(suffix)invalid.to(another)another.to(invalid)invalid.toNow(suffix)invalid.toISOString()invalid.toString()The following return false:
invalid.isAfter(another)invalid.isAfter(invalid)another.isAfter(invalid)invalid.isBefore(another)invalid.isBefore(invalid)another.isBefore(invalid)invalid.isBetween(another, another)invalid.isBetween(invalid, invalid)invalid.isSame(another)invalid.isSame(invalid)another.isSame(invalid)invalid.isSameOrAfter(another)invalid.isSameOrAfter(invalid)another.isSameOrAfter(invalid)invalid.isSameOrBefore(another)invalid.isSameOrBefore(invalid)another.isSameOrBefore(invalid)And these return null or NaN with some structure:
invalid.get(unit) returns null, as all other named gettersinvalid.toArray() === [NaN, NaN, NaN, NaN, NaN, NaN]invalid.toObject() has all values set to NaN
invalid.toDate() returns an invalid Date objectinvalid.toJSON() returns nullinvalid.unix() returns nullinvalid.valueOf() returns nullmoment().creationData();
After a moment object is created, all of the inputs can be accessed with creationData() method:
moment("2013-01-02", "YYYY-MM-DD", true).creationData() === { input: "2013-01-02", format: "YYYY-MM-DD", locale: Locale obj, isUTC: false, strict: true }
moment("15", "hh")
You can create a moment object specifying only some of the units, and the rest will be defaulted to the current day, month or year, or 0 for hours, minutes, seconds and milliseconds.
Defaulting to now, when nothing is passed:
moment(); // current date and time Defaulting to today, when only hours, minutes, seconds and milliseconds are passed:
moment(5, "HH"); // today, 5:00:00.000 moment({hour: 5}); // today, 5:00:00.000 moment({hour: 5, minute: 10}); // today, 5:10.00.000 moment({hour: 5, minute: 10, seconds: 20}); // today, 5:10.20.000 moment({hour: 5, minute: 10, seconds: 20, milliseconds: 300}); // today, 5:10.20.300
Defaulting to this month and year, when only days and smaller units are passed:
moment(5, "DD"); // this month, 5th day-of-month moment("4 05:06:07", "DD hh:mm:ss"); // this month, 4th day-of-month, 05:06:07.000
Defaulting to this year, if year is not specified:
moment(3, "MM"); // this year, 3rd month (March) moment("Apr 4 05:06:07", "MMM DD hh:mm:ss"); // this year, 4th April, 05:06:07.000
Moment.js uses overloaded getters and setters. You may be familiar with this pattern from its use in jQuery.
Calling these methods without parameters acts as a getter, and calling them with a parameter acts as a setter.
These map to the corresponding function on the native Date object.
moment().seconds(30).valueOf() === new Date().setSeconds(30); moment().seconds() === new Date().getSeconds();
If you are in UTC mode, they will map to the UTC equivalent.
moment.utc().seconds(30).valueOf() === new Date().setUTCSeconds(30); moment.utc().seconds() === new Date().getUTCSeconds();
For convenience, both singular and plural method names exist as of version 2.0.0.
Note: All of these methods mutate the original moment when used as setters.
Note: From 2.19.0 passing NaN to any setter is a no-op. Before 2.19.0 it was invalidating the moment in a wrong way.
moment().millisecond(Number); moment().millisecond(); // Number moment().milliseconds(Number); moment().milliseconds(); // Number
Gets or sets the milliseconds.
Accepts numbers from 0 to 999. If the range is exceeded, it will bubble up to the seconds.
moment().second(Number); moment().second(); // Number moment().seconds(Number); moment().seconds(); // Number
Gets or sets the seconds.
Accepts numbers from 0 to 59. If the range is exceeded, it will bubble up to the minutes.
moment().minute(Number); moment().minute(); // Number moment().minutes(Number); moment().minutes(); // Number
Gets or sets the minutes.
Accepts numbers from 0 to 59. If the range is exceeded, it will bubble up to the hour.
moment().hour(Number); moment().hour(); // Number moment().hours(Number); moment().hours(); // Number
Gets or sets the hour.
Accepts numbers from 0 to 23. If the range is exceeded, it will bubble up to the day.
moment().date(Number); moment().date(); // Number moment().dates(Number); moment().dates(); // Number
Gets or sets the day of the month.
Accepts numbers from 1 to 31. If the range is exceeded, it will bubble up to the months.
Note: Moment#date is for the date of the month, and Moment#day is for the day of the week.
Note: if you chain multiple actions to construct a date, you should start from a year, then a month, then a day etc. Otherwise you may get unexpected results, like when day=31 and current month has only 30 days (the same applies to native JavaScript Date manipulation), the returned date will be the 30th of the current month (see month for more details).
Bad: moment().date(day).month(month).year(year)
Good: moment().year(year).month(month).date(day)
2.16.0 deprecated using moment().dates(). Use moment().date() instead.
moment().day(Number|String); moment().day(); // Number moment().days(Number|String); moment().days(); // Number
Gets or sets the day of the week.
This method can be used to set the day of the week, with Sunday as 0 and Saturday as 6.
If the value given is from 0 to 6, the resulting date will be within the current (Sunday-to-Saturday) week.
If the range is exceeded, it will bubble up to other weeks.
moment().day(-7); // last Sunday (0 - 7) moment().day(0); // this Sunday (0) moment().day(7); // next Sunday (0 + 7) moment().day(10); // next Wednesday (3 + 7) moment().day(24); // 3 Wednesdays from now (3 + 7 + 7 + 7)
Note: Moment#date is for the date of the month, and Moment#day is for the day of the week.
As of 2.1.0, a day name is also supported. This is parsed in the moment's current locale.
moment().day("Sunday"); moment().day("Monday");
moment().weekday(Number);
moment().weekday(); // Number Gets or sets the day of the week according to the locale.
If the locale assigns Monday as the first day of the week, moment().weekday(0) will be Monday. If Sunday is the first day of the week, moment().weekday(0) will be Sunday.
As with moment#day, if the range is exceeded, it will bubble up to other weeks.
// when Monday is the first day of the week moment().weekday(-7); // last Monday moment().weekday(7); // next Monday // when Sunday is the first day of the week moment().weekday(-7); // last Sunday moment().weekday(7); // next Sunday
moment().isoWeekday(Number);
moment().isoWeekday(); // Number Gets or sets the ISO day of the week with 1 being Monday and 7 being Sunday.
As with moment#day, if the range is exceeded, it will bubble up to other weeks.
moment().isoWeekday(1); // Monday moment().isoWeekday(7); // Sunday
A day name is also supported. This is parsed in the moment's current locale.
moment().isoWeekday("Sunday"); moment().isoWeekday("Monday");
moment().dayOfYear(Number);
moment().dayOfYear(); // Number Gets or sets the day of the year.
Accepts numbers from 1 to 366. If the range is exceeded, it will bubble up to the years.
moment().week(Number); moment().week(); // Number moment().weeks(Number); moment().weeks(); // Number
Gets or sets the week of the year.
Because different locales define week of year numbering differently, Moment.js added moment#week to get/set the localized week of the year.
The week of the year varies depending on which day is the first day of the week (Sunday, Monday, etc), and which week is the first week of the year.
For example, in the United States, Sunday is the first day of the week. The week with January 1st in it is the first week of the year.
In France, Monday is the first day of the week, and the week with January 4th is the first week of the year.
The output of moment#week will depend on the locale for that moment.
When setting the week of the year, the day of the week is retained.
moment().isoWeek(Number); moment().isoWeek(); // Number moment().isoWeeks(Number); moment().isoWeeks(); // Number
Gets or sets the ISO week of the year.
When setting the week of the year, the day of the week is retained.
moment().month(Number|String); moment().month(); // Number moment().months(Number|String); moment().months(); // Number
Gets or sets the month.
Accepts numbers from 0 to 11. If the range is exceeded, it will bubble up to the year.
Note: Months are zero indexed, so January is month 0.
As of 2.1.0, a month name is also supported. This is parsed in the moment's current locale.
moment().month("January"); moment().month("Feb");
Before version 2.1.0, if a moment changed months and the new month did not have enough days to keep the current day of month, it would overflow to the next month.
As of version 2.1.0, this was changed to be clamped to the end of the target month.
// before 2.1.0 moment([2012, 0, 31]).month(1).format("YYYY-MM-DD"); // 2012-03-02 // after 2.1.0 moment([2012, 0, 31]).month(1).format("YYYY-MM-DD"); // 2012-02-29
2.16.0 deprecated using moment().months(). Use moment().month() instead.
moment().quarter(); // Number moment().quarter(Number); moment().quarters(); // Number moment().quarters(Number);
Gets the quarter (1 to 4).
moment('2013-01-01T00:00:00.000').quarter() // 1 moment('2013-04-01T00:00:00.000').subtract(1, 'ms').quarter() // 1 moment('2013-04-01T00:00:00.000').quarter() // 2 moment('2013-07-01T00:00:00.000').subtract(1, 'ms').quarter() // 2 moment('2013-07-01T00:00:00.000').quarter() // 3 moment('2013-10-01T00:00:00.000').subtract(1, 'ms').quarter() // 3 moment('2013-10-01T00:00:00.000').quarter() // 4 moment('2014-01-01T00:00:00.000').subtract(1, 'ms').quarter() // 4
Sets the quarter (1 to 4).
moment('2013-01-01T00:00:00.000').quarter(2) // '2013-04-01T00:00:00.000' moment('2013-02-05T05:06:07.000').quarter(2).format() // '2013-05-05T05:06:07-07:00'
moment().year(Number); moment().year(); // Number moment().years(Number); moment().years(); // Number
Gets or sets the year.
Accepts numbers from -270,000 to 270,000.
2.16.0 deprecated using moment().years(). Use moment().year() instead.
moment().weekYear(Number);
moment().weekYear(); // Number Gets or sets the week-year according to the locale.
Because the first day of the first week does not always fall on the first day of the year, sometimes the week-year will differ from the month year.
For example, in the US, the week that contains Jan 1 is always the first week. In the US, weeks also start on Sunday. If Jan 1 was a Monday, Dec 31 would belong to the same week as Jan 1, and thus the same week-year as Jan 1. Dec 30 would have a different week-year than Dec 31.
moment().isoWeekYear(Number);
moment().isoWeekYear(); // Number Gets or sets the ISO week-year.
moment().weeksInYear();
Gets the number of weeks according to locale in the current moment's year.
moment().isoWeeksInYear();
Gets the number of weeks in the current moment's year, according to ISO weeks.
moment().get('year'); moment().get('month'); // 0 to 11 moment().get('date'); moment().get('hour'); moment().get('minute'); moment().get('second'); moment().get('millisecond');
String getter. In general
moment().get(unit) === moment()[unit]()
Units are case insensitive, and support plural and short forms: year (years, y), month (months, M), date (dates, D), hour (hours, h), minute (minutes, m), second (seconds, s), millisecond (milliseconds, ms).
moment().set(String, Int); moment().set(Object(String, Int));
Generic setter, accepting unit as first argument, and value as second:
moment().set('year', 2013); moment().set('month', 3); // April moment().set('date', 1); moment().set('hour', 13); moment().set('minute', 20); moment().set('second', 30); moment().set('millisecond', 123); moment().set({'year': 2013, 'month': 3});
Units are case insensitive, and support plural and short forms: year (years, y), month (months, M), date (dates, D), hour (hours, h), minute (minutes, m), second (seconds, s), millisecond (milliseconds, ms).
Object parsing was added in 2.9.0
moment.max(Moment[,Moment...]); moment.max(Moment[]);
Returns the maximum (most distant future) of the given moment instances.
For example:
var a = moment().subtract(1, 'day'); var b = moment().add(1, 'day'); moment.max(a, b); // b var friends = fetchFriends(); /* [{name: 'Dan', birthday: '11.12.1977'}, {name: 'Mary', birthday: '11.12.1986'}, {name: 'Stephan', birthday: '11.01.1993'}]*/ var friendsBirthDays = friends.map(function(friend){ return moment(friend.birthday, 'DD.MM.YYYY'); }); moment.max(friendsBirthDays); // '11.01.1993'
With no arguments the function returns a moment instance with the current time.
From version 2.10.5, if an invalid moment is one of the arguments, the result is an invalid moment.
moment.max(moment(), moment.invalid()).isValid() === false moment.max(moment.invalid(), moment()).isValid() === false moment.max([moment(), moment.invalid()]).isValid() === false moment.max([moment.invalid(), moment()]).isValid() === false
moment.min(Moment[,Moment...]); moment.min(Moment[]);
Returns the minimum (most distant past) of the given moment instances.
For example:
var a = moment().subtract(1, 'day'); var b = moment().add(1, 'day'); moment.min(a, b); // a moment.min([a, b]); // a
With no arguments the function returns a moment instance with the current time.
From version 2.10.5, if an invalid moment is one of the arguments, the result is an invalid moment.
moment.min(moment(), moment.invalid()).isValid() === false moment.min(moment.invalid(), moment()).isValid() === false moment.min([moment(), moment.invalid()]).isValid() === false moment.min([moment.invalid(), moment()]).isValid() === false
Once you have a Moment, you may want to manipulate it in some way. There are a number of methods to help with this.
Moment.js uses the fluent interface pattern, also known as method chaining. This allows you to do crazy things like the following.
moment().add(7, 'days').subtract(1, 'months').year(2009).hours(0).minutes(0).seconds(0);
Note: It should be noted that moments are mutable. Calling any of the manipulation methods will change the original moment.
If you want to create a copy and manipulate it, you should use moment#clone before manipulating the moment. More info on cloning.
moment().add(Number, String); moment().add(Duration); moment().add(Object);
Mutates the original moment by adding time.
This is a pretty robust function for adding time to an existing moment. To add time, pass the key of what time you want to add, and the amount you want to add.
moment().add(7, 'days');
There are some shorthand keys as well if you're into that whole brevity thing.
moment().add(7, 'd');
| Key | Shorthand |
|---|---|
| years | y |
| quarters | Q |
| months | M |
| weeks | w |
| days | d |
| hours | h |
| minutes | m |
| seconds | s |
| milliseconds | ms |
If you want to add multiple different keys at the same time, you can pass them in as an object literal.
moment().add(7, 'days').add(1, 'months'); // with chaining moment().add({days:7,months:1}); // with object literal
There are no upper limits for the amounts, so you can overload any of the parameters.
moment().add(1000000, 'milliseconds'); // a million milliseconds moment().add(360, 'days'); // 360 days
If the day of the month on the original date is greater than the number of days in the final month, the day of the month will change to the last day in the final month.
moment([2010, 0, 31]); // January 31 moment([2010, 0, 31]).add(1, 'months'); // February 28
There are also special considerations to keep in mind when adding time that crosses over daylight saving time. If you are adding years, months, weeks, or days, the original hour will always match the added hour.
var m = moment(new Date(2011, 2, 12, 5, 0, 0)); // the day before DST in the US m.hours(); // 5 m.add(1, 'days').hours(); // 5
If you are adding hours, minutes, seconds, or milliseconds, the assumption is that you want precision to the hour, and will result in a different hour.
var m = moment(new Date(2011, 2, 12, 5, 0, 0)); // the day before DST in the US m.hours(); // 5 m.add(24, 'hours').hours(); // 6 (but you may have to set the timezone first)
Alternatively, you can use durations to add to moments.
var duration = moment.duration({'days' : 1}); moment([2012, 0, 31]).add(duration); // February 1
Before version 2.8.0, the moment#add(String, Number) syntax was also supported. It has been deprecated in favor of moment#add(Number, String).
moment().add('seconds', 1); // Deprecated in 2.8.0 moment().add(1, 'seconds');
As of 2.12.0 when decimal values are passed for days and months, they are rounded to the nearest integer. Weeks, quarters, and years are converted to days or months, and then rounded to the nearest integer.
moment().add(1.5, 'months') == moment().add(2, 'months') moment().add(.7, 'years') == moment().add(8, 'months') //.7*12 = 8.4, rounded to 8
moment().subtract(Number, String); moment().subtract(Duration); moment().subtract(Object);
Mutates the original moment by subtracting time.
This is exactly the same as moment#add, only instead of adding time, it subtracts time.
moment().subtract(7, 'days');
Before version 2.8.0, the moment#subtract(String, Number) syntax was also supported. It has been deprecated in favor of moment#subtract(Number, String).
moment().subtract('seconds', 1); // Deprecated in 2.8.0 moment().subtract(1, 'seconds');
As of 2.12.0 when decimal values are passed for days and months, they are rounded to the nearest integer. Weeks, quarters, and years are converted to days or months, and then rounded to the nearest integer.
moment().subtract(1.5, 'months') == moment().subtract(2, 'months') moment().subtract(.7, 'years') == moment().subtract(8, 'months') //.7*12 = 8.4, rounded to 8
Note that in order to make the operations moment.add(-.5, 'days') and moment.subtract(.5, 'days') equivalent, -.5, -1.5, -2.5, etc are rounded down.
moment().startOf(String);
Mutates the original moment by setting it to the start of a unit of time.
moment().startOf('year'); // set to January 1st, 12:00 am this year moment().startOf('month'); // set to the first of this month, 12:00 am moment().startOf('quarter'); // set to the beginning of the current quarter, 1st day of months, 12:00 am moment().startOf('week'); // set to the first day of this week, 12:00 am moment().startOf('isoWeek'); // set to the first day of this week according to ISO 8601, 12:00 am moment().startOf('day'); // set to 12:00 am today moment().startOf('date'); // set to 12:00 am today moment().startOf('hour'); // set to now, but with 0 mins, 0 secs, and 0 ms moment().startOf('minute'); // set to now, but with 0 seconds and 0 milliseconds moment().startOf('second'); // same as moment().milliseconds(0);
These shortcuts are essentially the same as the following.
moment().startOf('year'); moment().month(0).date(1).hours(0).minutes(0).seconds(0).milliseconds(0);
moment().startOf('hour'); moment().minutes(0).seconds(0).milliseconds(0)
As of version 2.0.0, moment#startOf('day') replaced moment#sod.
Note: moment#startOf('week') was added in version 2.0.0.
As of version 2.1.0, moment#startOf('week') uses the locale aware week start day.
Note: moment#startOf('isoWeek') was added in version 2.2.0.
Note: moment#startOf('date') was added as an alias for day in 2.13.0
moment().endOf(String);
Mutates the original moment by setting it to the end of a unit of time.
This is the same as moment#startOf, only instead of setting to the start of a unit of time, it sets to the end of a unit of time.
moment().endOf("year"); // set the moment to 12-31 23:59:59.999 this year
As of version 2.0.0, moment#endOf('day') replaced moment#eod.
Note: moment#endOf('week') was added in version 2.0.0.
As of version 2.1.0, moment#endOf('week') uses the locale aware week start day.
moment().max(Moment|String|Number|Date|Array);
Note: This function has been deprecated in 2.7.0. Consider moment.min instead.
Limits the moment to a maximum of another moment value. So a.max(b) is the same as a = moment.min(a, b) (note that max is converted to min).
Sometimes, server clocks are not quite in sync with client clocks. This ends up displaying humanized strings such as "in a few seconds" rather than "a few seconds ago". You can prevent that with moment#max():
This is the counterpart for moment#min.
var momentFromServer = moment(input); var clampedMoment = momentFromServer.max();
You can pass anything to moment#max that you would pass to moment().
moment().max(moment().add(1, 'd')); moment().max("2013-04-20T20:00:00+0800"); moment().max("Jan 1 2001", "MMM D YYYY"); moment().max(new Date(2012, 1, 8));
moment().min(Moment|String|Number|Date|Array);
Note: This function has been deprecated in 2.7.0. Consider moment.max instead.
Limits the moment to a minimum of another moment value. So a.min(b) is the same as a = moment.max(a, b) (note that min is converted to max).
This is the counterpart for moment#max.
moment().min("2013-04-20T20:00:00+0800"); This can be used in conjunction with moment#max to clamp a moment to a range.
var start = moment().startOf('week'); var end = moment().endOf('week'); var actual = moment().min(start).max(end);
moment().local();
Sets a flag on the original moment to use local time to display a moment instead of the original moment's time.
var a = moment.utc([2011, 0, 1, 8]); a.hours(); // 8 UTC a.local(); a.hours(); // 0 PST
Local can also be used to convert out of a fixed offset mode:
moment.parseZone('2016-05-03T22:15:01+02:00').local().format(); // "2016-05-03T15:15:01-05:00"
See moment.utc() for more information on UTC mode.
moment().utc();
Sets a flag on the original moment to use UTC to display a moment instead of the original moment's time.
var a = moment([2011, 0, 1, 8]); a.hours(); // 8 PST a.utc(); a.hours(); // 16 UTC
UTC can also be used to convert out of a fixed offset mode:
moment.parseZone('2016-05-03T22:15:01+02:00').utc().format(); //"2016-05-03T20:15:01Z"
See moment.utc() for more information on UTC mode.
moment().utcOffset(); moment().utcOffset(Number|String); moment().utcOffset(Number|String, Boolean);
Get the UTC offset in minutes.
Note: Unlike moment.fn.zone this function returns the real offset from UTC, not the reverse offset (as returned by Date.prototype.getTimezoneOffset).
Getting the utcOffset of the current object:
moment().utcOffset(); // (-240, -120, -60, 0, 60, 120, 240, etc.) Setting the UTC offset by supplying minutes. Note that once you set an offset, it's fixed and won't change on its own (i.e there are no DST rules). If you want an actual time zone -- time in a particular location, like America/Los_Angeles, consider moment-timezone.
moment().utcOffset(120); If the input is less than 16 and greater than -16, it will interpret your input as hours instead.
// these are equivalent moment().utcOffset(8); // set hours offset moment().utcOffset(480); // set minutes offset (8 * 60)
It is also possible to set the UTC offset from a string.
// these are equivalent moment().utcOffset("+08:00"); moment().utcOffset(8); moment().utcOffset(480);
moment#utcOffset will search the string for the first match of +00:00 +0000
-00:00 -0000 Z, so you can even pass an ISO8601 formatted string and the moment will be changed to that UTC offset.
Note that the string, if not 'Z', is required to start with the + or - character.
moment().utcOffset("2013-03-07T07:00:00+08:00"); The utcOffset function has an optional second parameter which accepts a boolean value indicating whether to keep the existing time of day.
Passing false (the default) will keep the same instant in Universal Time, but the local time will change.
Passing true will keep the same local time, but at the expense of choosing a different point in Universal Time.
One use of this feature is if you want to construct a moment with a specific time zone offset using only numeric input values:
moment([2016, 0, 1, 0, 0, 0]).utcOffset(-5, true) // Equivalent to "2016-01-01T00:00:00-05:00"
moment().zone(); moment().zone(Number|String);
Note: This function has been deprecated in 2.9.0. Consider moment.fn.utcOffset instead.
Get the time zone offset in minutes.
moment().zone(); // (60, 120, 240, etc.) As of version 2.1.0, it is possible to set the offset by passing in the number of minutes offset from GMT.
moment().zone(120); If the input is less than 16 and greater than -16, it will interpret your input as hours instead.
// these are equivalent moment().zone(480); moment().zone(8);
It is also possible to set the zone from a string.
moment().zone("-08:00"); moment#zone will search the string for the first match of +00:00 +0000 -00:00 -0000, so you can even pass an ISO8601 formatted string and the moment will be changed to that zone.
moment().zone("2013-03-07T07:00:00-08:00"); Once parsing and manipulation are done, you need some way to display the moment.
moment().format(); moment().format(String);
This is the most robust display option. It takes a string of tokens and replaces them with their corresponding values.
moment().format(); // "2014-09-08T08:02:17-05:00" (ISO 8601, no fractional seconds) moment().format("dddd, MMMM Do YYYY, h:mm:ss a"); // "Sunday, February 14th 2010, 3:25:50 pm" moment().format("ddd, hA"); // "Sun, 3PM" moment('gibberish').format('YYYY MM DD'); // "Invalid date"
| Token | Output | |
|---|---|---|
| Month | M | 1 2 ... 11 12 |
| Mo | 1st 2nd ... 11th 12th | |
| MM | 01 02 ... 11 12 | |
| MMM | Jan Feb ... Nov Dec | |
| MMMM | January February ... November December | |
| Quarter | Q | 1 2 3 4 |
| Qo | 1st 2nd 3rd 4th | |
| Day of Month | D | 1 2 ... 30 31 |
| Do | 1st 2nd ... 30th 31st | |
| DD | 01 02 ... 30 31 | |
| Day of Year | DDD | 1 2 ... 364 365 |
| DDDo | 1st 2nd ... 364th 365th | |
| DDDD | 001 002 ... 364 365 | |
| Day of Week | d | 0 1 ... 5 6 |
| do | 0th 1st ... 5th 6th | |
| dd | Su Mo ... Fr Sa | |
| ddd | Sun Mon ... Fri Sat | |
| dddd | Sunday Monday ... Friday Saturday | |
| Day of Week (Locale) | e | 0 1 ... 5 6 |
| Day of Week (ISO) | E | 1 2 ... 6 7 |
| Week of Year | w | 1 2 ... 52 53 |
| wo | 1st 2nd ... 52nd 53rd | |
| ww | 01 02 ... 52 53 | |
| Week of Year (ISO) | W | 1 2 ... 52 53 |
| Wo | 1st 2nd ... 52nd 53rd | |
| WW | 01 02 ... 52 53 | |
| Year | YY | 70 71 ... 29 30 |
| YYYY | 1970 1971 ... 2029 2030 | |
| Y | 1970 1971 ... 9999 +10000 +10001 Note: This complies with the ISO 8601 standard for dates past the year 9999 | |
| Week Year | gg | 70 71 ... 29 30 |
| gggg | 1970 1971 ... 2029 2030 | |
| Week Year (ISO) | GG | 70 71 ... 29 30 |
| GGGG | 1970 1971 ... 2029 2030 | |
| AM/PM | A | AM PM |
| a | am pm | |
| Hour | H | 0 1 ... 22 23 |
| HH | 00 01 ... 22 23 | |
| h | 1 2 ... 11 12 | |
| hh | 01 02 ... 11 12 | |
| k | 1 2 ... 23 24 | |
| kk | 01 02 ... 23 24 | |
| Minute | m | 0 1 ... 58 59 |
| mm | 00 01 ... 58 59 | |
| Second | s | 0 1 ... 58 59 |
| ss | 00 01 ... 58 59 | |
| Fractional Second | S | 0 1 ... 8 9 |
| SS | 00 01 ... 98 99 | |
| SSS | 000 001 ... 998 999 | |
| SSSS ... SSSSSSSSS | 000[0..] 001[0..] ... 998[0..] 999[0..] | |
| Time Zone | z or zz | EST CST ... MST PST Note: as of 1.6.0, the z/zz format tokens have been deprecated from plain moment objects. Read more about it here. However, they do work if you are using a specific time zone with the moment-timezone addon. |
| Z | -07:00 -06:00 ... +06:00 +07:00 | |
| ZZ | -0700 -0600 ... +0600 +0700 | |
| Unix Timestamp | X | 1360013296 |
| Unix Millisecond Timestamp | x | 1360013296123 |
Z ZZ were added in 1.2.0.
S SS SSS were added in 1.6.0.
X was added in 2.0.0.
e E gg gggg GG GGGG were added in 2.1.0.
x was added in 2.8.4.
SSSS to SSSSSSSSS were added in 2.10.5. They display 3 significant digits and the rest is filled with zeros.
k and kk were added in 2.13.0.
Because preferred formatting differs based on locale, there are a few tokens that can be used to format a moment based on its locale.
There are upper and lower case variations on the same formats. The lowercase version is intended to be the shortened version of its uppercase counterpart.
| Time | LT | 8:30 PM |
| Time with seconds | LTS | 8:30:25 PM |
| Month numeral, day of month, year | L | 09/04/1986 |
| l | 9/4/1986 | |
| Month name, day of month, year | LL | September 4, 1986 |
| ll | Sep 4, 1986 | |
| Month name, day of month, year, time | LLL | September 4, 1986 8:30 PM |
| lll | Sep 4, 1986 8:30 PM | |
| Month name, day of month, day of week, year, time | LLLL | Thursday, September 4, 1986 8:30 PM |
| llll | Thu, Sep 4, 1986 8:30 PM |
L LL LLL LLLL LT are available in version 1.3.0. l ll lll llll are available in 2.0.0. LTS was added in 2.8.4.
To escape characters in format strings, you can wrap the characters in square brackets.
moment().format('[today] dddd'); // 'today Sunday'
Note: While these date formats are very similar to LDML date formats, there are a few minor differences regarding day of month, day of year, and day of week.
For a breakdown of a few different date formatting tokens across different locales, see this chart of date formatting tokens.
To compare Moment.js formatting speed against other libraries, check out this comparison against other libraries.
If you are more comfortable working with strftime instead of LDML-like parsing tokens, you can use Ben Oakes' plugin. benjaminoakes/moment-strftime.
As of version 1.5.0, calling moment#format without a format will default to moment.defaultFormat. Out of the box, moment.defaultFormat is the ISO8601 format YYYY-MM-DDTHH:mm:ssZ.
As of version 2.13.0, when in UTC mode, the default format is governed by moment.defaultFormatUtc which is in the format YYYY-MM-DDTHH:mm:ss[Z]. This returns Z as the offset, instead of +00:00.
In certain instances, a local timezone (such as Atlantic/Reykjavik) may have a zero offset, and will be considered to be UTC. In such cases, it may be useful to set moment.defaultFormat and moment.defaultFormatUtc to use the same formatting.
moment().fromNow(); moment().fromNow(Boolean);
A common way of displaying time is handled by moment#fromNow. This is sometimes called timeago or relative time.
moment([2007, 0, 29]).fromNow(); // 4 years ago
If you pass true, you can get the value without the suffix.
moment([2007, 0, 29]).fromNow(); // 4 years ago moment([2007, 0, 29]).fromNow(true); // 4 years
The base strings are customized by the current locale.
The breakdown of which string is displayed for each length of time is outlined in the table below.
| Range | Key | Sample Output |
|---|---|---|
| 0 to 44 seconds | s | a few seconds ago |
| 44 to 44 seconds | ss | 44 seconds ago |
| 45 to 89 seconds | m | a minute ago |
| 90 seconds to 44 minutes | mm | 2 minutes ago ... 44 minutes ago |
| 45 to 89 minutes | h | an hour ago |
| 90 minutes to 21 hours | hh | 2 hours ago ... 21 hours ago |
| 22 to 35 hours | d | a day ago |
| 36 hours to 25 days | dd | 2 days ago ... 25 days ago |
| 26 to 45 days | M | a month ago |
| 45 to 319 days | MM | 2 months ago ... 10 months ago |
| 320 to 547 days (1.5 years) | y | a year ago |
| 548 days+ | yy | 2 years ago ... 20 years ago |
Note: From version 2.10.3, if the target moment object is invalid the result is the localized Invalid date string.
Note: The ss key was added in 2.18.0.
moment().from(Moment|String|Number|Date|Array); moment().from(Moment|String|Number|Date|Array, Boolean);
You may want to display a moment in relation to a time other than now. In that case, you can use moment#from.
var a = moment([2007, 0, 28]); var b = moment([2007, 0, 29]); a.from(b) // "a day ago"
The first parameter is anything you can pass to moment() or an actual Moment.
var a = moment([2007, 0, 28]); var b = moment([2007, 0, 29]); a.from(b); // "a day ago" a.from([2007, 0, 29]); // "a day ago" a.from(new Date(2007, 0, 29)); // "a day ago" a.from("2007-01-29"); // "a day ago"
Like moment#fromNow, passing true as the second parameter returns value without the suffix. This is useful wherever you need to have a human readable length of time.
var start = moment([2007, 0, 5]); var end = moment([2007, 0, 10]); end.from(start); // "in 5 days" end.from(start, true); // "5 days"
From version 2.10.3, if any of the endpoints are invalid the result is the localized Invalid date string.
moment().toNow(); moment().toNow(Boolean);
A common way of displaying time is handled by moment#toNow. This is sometimes called timeago or relative time.
This is similar to moment.fromNow, but gives the opposite interval: a.fromNow() = - a.toNow().
This is similar to moment.to, but is special-cased for the current time. Use moment.to, if you want to control the two end points of the interval.
moment([2007, 0, 29]).toNow(); // in 4 years
If you pass true, you can get the value without the prefix.
moment([2007, 0, 29]).toNow(); // in 4 years moment([2007, 0, 29]).toNow(true); // 4 years
The base strings are customized by the current locale.
The breakdown of which string is displayed for each length of time is outlined in the table below.
| Range | Key | Sample Output |
|---|---|---|
| 0 to 44 seconds | s | in seconds |
| 45 to 89 seconds | m | in a minute |
| 90 seconds to 44 minutes | mm | in 2 minutes ... in 44 minutes |
| 45 to 89 minutes | h | in an hour |
| 90 minutes to 21 hours | hh | in 2 hours ... in 21 hours |
| 22 to 35 hours | d | in a day |
| 36 hours to 25 days | dd | in 2 days ... in 25 days |
| 26 to 45 days | M | in a month |
| 45 to 319 days | MM | in 2 months ... in 10 months |
| 320 to 547 days (1.5 years) | y | in a year |
| 548 days+ | yy | in 2 years ... in 20 years |
From version 2.10.3, if the target moment object is invalid the result is the localized Invalid date string.
moment().to(Moment|String|Number|Date|Array); moment().to(Moment|String|Number|Date|Array, Boolean);
You may want to display a moment in relation to a time other than now. In that case, you can use moment#to.
var a = moment([2007, 0, 28]); var b = moment([2007, 0, 29]); a.to(b) // "in a day"
The first parameter is anything you can pass to moment() or an actual Moment.
var a = moment([2007, 0, 28]); var b = moment([2007, 0, 29]); a.to(b); // "in a day" a.to([2007, 0, 29]); // "in a day" a.to(new Date(2007, 0, 29)); // "in a day" a.to("2007-01-29"); // "in a day"
Like moment#toNow, passing true as the second parameter returns value without the suffix. This is useful wherever you need to have a human readable length of time.
var start = moment([2007, 0, 5]); var end = moment([2007, 0, 10]); end.to(start); // "5 days ago" end.to(start, true); // "5 days"
From version 2.10.3, if any of the endpoints are invalid the result is the localized Invalid date string.
moment().calendar();
moment().calendar(referenceTime);
moment().calendar(referenceTime, formats); // from 2.10.5 Calendar time displays time relative to a given referenceTime (defaults to now), but does so slightly differently than moment#fromNow.
moment#calendar will format a date with different strings depending on how close to referenceTime's date (today by default) the date is.
| Last week | Last Monday at 2:30 AM |
| The day before | Yesterday at 2:30 AM |
| The same day | Today at 2:30 AM |
| The next day | Tomorrow at 2:30 AM |
| The next week | Sunday at 2:30 AM |
| Everything else | 7/10/2011 |
These strings are localized, and can be customized.
From 2.10.5 moment supports specifying calendar output formats per invocation:
moment().calendar(null, { sameDay: '[Today]', nextDay: '[Tomorrow]', nextWeek: 'dddd', lastDay: '[Yesterday]', lastWeek: '[Last] dddd', sameElse: 'DD/MM/YYYY' });
sameElse is used as the format when the moment is more than a week away from the referenceTime
Note: From version 2.14.0 the formats argument to calendar can be a callback that is executed within the moment context with a single argument now:
moment().calendar(null, { sameDay: function (now) { if (this.isBefore(now)) { return '[Will Happen Today]'; } else { return '[Happened Today]'; } /* ... */ } });
moment().diff(Moment|String|Number|Date|Array); moment().diff(Moment|String|Number|Date|Array, String); moment().diff(Moment|String|Number|Date|Array, String, Boolean);
To get the difference in milliseconds, use moment#diff like you would use moment#from.
var a = moment([2007, 0, 29]); var b = moment([2007, 0, 28]); a.diff(b) // 86400000
To get the difference in another unit of measurement, pass that measurement as the second argument.
var a = moment([2007, 0, 29]); var b = moment([2007, 0, 28]); a.diff(b, 'days') // 1
To get the duration of a difference between two moments, you can pass diff as an argument into moment#duration. See the docs on moment#duration for more info.
The supported measurements are years, months, weeks, days, hours, minutes, and seconds. For ease of development, the singular forms are supported as of 2.0.0. Units of measurement other than milliseconds are available in version 1.1.1.
By default, moment#diff will truncate the result to zero decimal places, returning an integer. If you want a floating point number, pass true as the third argument. Before 2.0.0, moment#diff returned a number rounded to the nearest integer, not a truncated number.
var a = moment([2008, 9]); var b = moment([2007, 0]); a.diff(b, 'years'); // 1 a.diff(b, 'years', true); // 1.75
If the moment is earlier than the moment you are passing to moment.fn.diff, the return value will be negative.
var a = moment(); var b = moment().add(1, 'seconds'); a.diff(b) // -1000 b.diff(a) // 1000
An easy way to think of this is by replacing .diff( with a minus operator.
// a < b a.diff(b) // a - b < 0 b.diff(a) // b - a > 0
moment#diff has some special handling for month and year diffs. It is optimized to ensure that two months with the same date are always a whole number apart.
So Jan 15 to Feb 15 should be exactly 1 month.
Feb 28 to Mar 28 should be exactly 1 month.
Feb 28 2011 to Feb 28 2012 should be exactly 1 year.
See more discussion on the month and year diffs here
This change to month and year diffs was made in 2.0.0. As of version 2.9.0 diff also support quarter unit.
moment().valueOf(); +moment();
moment#valueOf simply outputs the number of milliseconds since the Unix Epoch, just like Date#valueOf.
moment(1318874398806).valueOf(); // 1318874398806 +moment(1318874398806); // 1318874398806
To get a Unix timestamp (the number of seconds since the epoch) from a Moment, use moment#unix.
Note: ECMAScript calls this a "Time Value"
moment().unix();
moment#unix outputs a Unix timestamp (the number of seconds since the Unix Epoch).
moment(1318874398806).unix(); // 1318874398
This value is floored to the nearest second, and does not include a milliseconds component.
moment().daysInMonth();
Get the number of days in the current month.
moment("2012-02", "YYYY-MM").daysInMonth() // 29 moment("2012-01", "YYYY-MM").daysInMonth() // 31
moment().toDate();
To get a copy of the native Date object that Moment.js wraps, use moment#toDate.
This will return a copy of the Date that the moment uses, so any changes to that Date will not cause moment to change. If you want to change the moment Date, see moment#manipulate or moment#set.
moment#native has been replaced by moment#toDate and has been deprecated as of 1.6.0.
moment().toArray();
This returns an array that mirrors the parameters from new Date().
moment().toArray(); // [2013, 1, 4, 14, 40, 16, 154]; moment().toJSON();
When serializing an object to JSON, if there is a Moment object, it will be represented as an ISO8601 string, adjusted to UTC.
JSON.stringify({
postDate : moment()
}); // '{"postDate":"2013-02-04T22:44:30.652Z"}' If instead you would like an ISO8601 string that reflects the moment's utcOffset(), then you can modify the toJSON function like this:
moment.fn.toJSON = function() { return this.format(); }
This changes the behavior as follows:
JSON.stringify({
postDate : moment()
}); // '{"postDate":"2013-02-04T14:44:30-08:00"}' moment().toISOString();
moment().toISOString(keepOffset); // from 2.20.0 Formats a string to the ISO8601 standard.
moment().toISOString() // 2013-02-04T22:44:30.652Z Note that .toISOString() returns a timestamp in UTC, even if the moment in question is in local mode. This is done to provide consistency with the specification for native JavaScript Date .toISOString(), as outlined in the ES2015 specification. From version 2.20.0, you may call .toISOString(true) to prevent UTC conversion.
From version 2.8.4 the native Date.prototype.toISOString is used if available, for performance reasons.
moment().toObject();
This returns an object containing year, month, day-of-month, hour, minute, seconds, milliseconds.
moment().toObject() // { // years: 2015 // months: 6 // date: 26, // hours: 1, // minutes: 53, // seconds: 14, // milliseconds: 600 // }
moment().toString();
Returns an english string in a similar format to JS Date's .toString().
moment().toString() // "Sat Apr 30 2016 16:59:46 GMT-0500" moment().inspect();
Returns a machine readable string, that can be evaluated to produce the same moment. Because of the name its also used in node interactive shell to display objects.
moment().inspect() // 'moment("2016-11-09T22:23:27.861")' moment.utc().inspect() // 'moment.utc("2016-11-10T06:24:10.638+00:00")' moment.parseZone('2016-11-10T06:24:12.958+05:00').inspect() // 'moment.parseZone("2016-11-10T06:24:12.958+05:00")' moment(new Date('nope')).inspect() // 'moment.invalid(/* Invalid Date */)' moment('blah', 'YYYY').inspect() // 'moment.invalid(/* blah */)'
Note: This function is mostly intended for debugging, not all cases are handled precisely.
moment().isBefore(Moment|String|Number|Date|Array); moment().isBefore(Moment|String|Number|Date|Array, String);
Check if a moment is before another moment. The first argument will be parsed as a moment, if not already so.
moment('2010-10-20').isBefore('2010-10-21'); // true
If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
As the second parameter determines the precision, and not just a single value to check, using day will check for year, month and day.
moment('2010-10-20').isBefore('2010-12-31', 'year'); // false moment('2010-10-20').isBefore('2011-01-01', 'year'); // true
Like moment#isAfter and moment#isSame, any of the units of time that are supported for moment#startOf are supported for moment#isBefore.
year month week day hour minute second
If nothing is passed to moment#isBefore, it will default to the current time.
NOTE: moment().isBefore() has undefined behavior and should not be used! If the code runs fast the initial created moment would be the same as the one created in isBefore to perform the check, so the result would be false. But if the code runs slower it's possible that the moment created in isBefore is measurably after the one created in moment(), so the call would return true.
moment().isSame(Moment|String|Number|Date|Array); moment().isSame(Moment|String|Number|Date|Array, String);
Check if a moment is the same as another moment. The first argument will be parsed as a moment, if not already so.
moment('2010-10-20').isSame('2010-10-20'); // true
If you want to limit the granularity to a unit other than milliseconds, pass it as the second parameter.
moment('2010-10-20').isSame('2009-12-31', 'year'); // false moment('2010-10-20').isSame('2010-01-01', 'year'); // true moment('2010-10-20').isSame('2010-12-31', 'year'); // true moment('2010-10-20').isSame('2011-01-01', 'year'); // false
When including a second parameter, it will match all units equal or larger. Passing in month will check month and year. Passing in day will check day, month, and year.
moment('2010-01-01').isSame('2011-01-01', 'month'); // false, different year moment('2010-01-01').isSame('2010-02-01', 'day'); // false, different month
Like moment#isAfter and moment#isBefore, any of the units of time that are supported for moment#startOf are supported for moment#isSame.
year month week day hour minute second
moment().isAfter(Moment|String|Number|Date|Array); moment().isAfter(Moment|String|Number|Date|Array, String);
Check if a moment is after another moment. The first argument will be parsed as a moment, if not already so.
moment('2010-10-20').isAfter('2010-10-19'); // true
If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
As the second parameter determines the precision, and not just a single value to check, using day will check for year, month and day.
moment('2010-10-20').isAfter('2010-01-01', 'year'); // false moment('2010-10-20').isAfter('2009-12-31', 'year'); // true
Like moment#isSame and moment#isBefore, any of the units of time that are supported for moment#startOf are supported for moment#isAfter.
year month week day hour minute second
If nothing is passed to moment#isAfter, it will default to the current time.
moment().isAfter(); // false moment().isSameOrBefore(Moment|String|Number|Date|Array); moment().isSameOrBefore(Moment|String|Number|Date|Array, String);
Check if a moment is before or the same as another moment. The first argument will be parsed as a moment, if not already so.
moment('2010-10-20').isSameOrBefore('2010-10-21'); // true moment('2010-10-20').isSameOrBefore('2010-10-20'); // true moment('2010-10-20').isSameOrBefore('2010-10-19'); // false
If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
As the second parameter determines the precision, and not just a single value to check, using day will check for year, month and day.
moment('2010-10-20').isSameOrBefore('2009-12-31', 'year'); // false moment('2010-10-20').isSameOrBefore('2010-12-31', 'year'); // true moment('2010-10-20').isSameOrBefore('2011-01-01', 'year'); // true
Like moment#isAfter and moment#isSame, any of the units of time that are supported for moment#startOf are supported for moment#isSameOrBefore:
year month week day hour minute second
moment().isSameOrAfter(Moment|String|Number|Date|Array); moment().isSameOrAfter(Moment|String|Number|Date|Array, String);
Check if a moment is after or the same as another moment. The first argument will be parsed as a moment, if not already so.
moment('2010-10-20').isSameOrAfter('2010-10-19'); // true moment('2010-10-20').isSameOrAfter('2010-10-20'); // true moment('2010-10-20').isSameOrAfter('2010-10-21'); // false
If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
As the second parameter determines the precision, and not just a single value to check, using day will check for year, month and day.
moment('2010-10-20').isSameOrAfter('2011-12-31', 'year'); // false moment('2010-10-20').isSameOrAfter('2010-01-01', 'year'); // true moment('2010-10-20').isSameOrAfter('2009-12-31', 'year'); // true
Like moment#isSame and moment#isBefore, any of the units of time that are supported for moment#startOf are supported for moment#isSameOrAfter:
year month week day hour minute second
//From 2.13.0 onward moment().isBetween(moment-like, moment-like); moment().isBetween(moment-like, moment-like, String); moment().isBetween(moment-like, moment-like, String, String); // where moment-like is Moment|String|Number|Date|Array //2.9.0 to 2.12.0 moment().isBetween(moment-like, moment-like); moment().isBetween(moment-like, moment-like, String); // where moment-like is Moment|String|Number|Date|Array
Check if a moment is between two other moments, optionally looking at unit scale (minutes, hours, days, etc). The match is exclusive. The first two arguments will be parsed as moments, if not already so.
moment('2010-10-20').isBetween('2010-10-19', '2010-10-25'); // true
If you want to limit the granularity to a unit other than milliseconds, pass the units as the third parameter.
moment('2010-10-20').isBetween('2010-01-01', '2012-01-01', 'year'); // false moment('2010-10-20').isBetween('2009-12-31', '2012-01-01', 'year'); // true
Like moment#isSame, moment#isBefore, moment#isAfter any of the units of time that are supported for moment#startOf are supported for moment#isBetween. Year, month, week, day, hour, minute, and second.
Version 2.13.0 introduces inclusivity. A [ indicates inclusion of a value. A ( indicates exclusion. If the inclusivity parameter is used, both indicators must be passed.
moment('2016-10-30').isBetween('2016-10-30', '2016-12-30', null, '()'); //false moment('2016-10-30').isBetween('2016-10-30', '2016-12-30', null, '[)'); //true moment('2016-10-30').isBetween('2016-01-01', '2016-10-30', null, '()'); //false moment('2016-10-30').isBetween('2016-01-01', '2016-10-30', null, '(]'); //true moment('2016-10-30').isBetween('2016-10-30', '2016-10-30', null, '[]'); //true
Note that in the event that the from and to parameters are the same, but the inclusivity parameters are different, false will preside.
moment('2016-10-30').isBetween('2016-10-30', '2016-10-30', null, '(]'); //false
If the inclusivity parameter is not specified, Moment will default to ().
moment().isDST();
moment#isDST checks if the current moment is in daylight saving time.
moment([2011, 2, 12]).isDST(); // false, March 12 2011 is not DST moment([2011, 2, 14]).isDST(); // true, March 14 2011 is DST
moment('2013-03-10 2:30', 'YYYY-MM-DD HH:mm').isDSTShifted()
Note: As of version 2.14.0 this function is deprecated. It doesn't give the right answer after modifying the moment object. For more information refer to moment/3160
Another important piece of validation is to know if the date has been moved by a DST. For example, in most of the United States:
moment('2013-03-10 2:30', 'YYYY-MM-DD HH:mm').format(); //=> '2013-03-10T01:30:00-05:00'
This is because daylight saving time shifts the time from 2:00 to 3:00, so 2:30 isn't a real time. The resulting time is browser-dependent, either adjusting the time forward or backwards. Use moment#isDSTShifted to test for this condition.
Note: before 2.3.0, Moment objects in this condition always returned false for moment#isValid; they now return true.
moment().isLeapYear();
moment#isLeapYear returns true if that year is a leap year, and false if it is not.
moment([2000]).isLeapYear() // true moment([2001]).isLeapYear() // false moment([2100]).isLeapYear() // false
moment.isMoment(obj);
To check if a variable is a moment object, use moment.isMoment().
moment.isMoment() // false moment.isMoment(new Date()) // false moment.isMoment(moment()) // true
From version 2.11.0, you can also test for a moment object by instanceof operator:
moment() instanceof moment // true
moment.isDate(obj);
To check if a variable is a native js Date object, use moment.isDate().
moment.isDate(); // false moment.isDate(new Date()); // true moment.isDate(moment()); // false
Moment.js has robust support for internationalization.
You can load multiple locales and easily switch between them.
In addition to assigning a global locale, you can assign a locale to a specific moment.
// From 2.8.1 onward moment.locale(String); moment.locale(String[]); moment.locale(String, Object); // Deprecated in 2.8.1 moment.lang(String); moment.lang(String[]); moment.lang(String, Object);
By default, Moment.js comes with English (United States) locale strings. If you need other locales, you can load them into Moment.js for later use.
To load a locale, pass the key and the string values to moment.locale.
More details on each of the parts of the locale bundle can be found in the customization section.
moment.locale('fr', { months : 'janvier_février_mars_avril_mai_juin_juillet_août_septembre_octobre_novembre_décembre'.split('_'), monthsShort : 'janv._févr._mars_avr._mai_juin_juil._août_sept._oct._nov._déc.'.split('_'), monthsParseExact : true, weekdays : 'dimanche_lundi_mardi_mercredi_jeudi_vendredi_samedi'.split('_'), weekdaysShort : 'dim._lun._mar._mer._jeu._ven._sam.'.split('_'), weekdaysMin : 'Di_Lu_Ma_Me_Je_Ve_Sa'.split('_'), weekdaysParseExact : true, longDateFormat : { LT : 'HH:mm', LTS : 'HH:mm:ss', L : 'DD/MM/YYYY', LL : 'D MMMM YYYY', LLL : 'D MMMM YYYY HH:mm', LLLL : 'dddd D MMMM YYYY HH:mm' }, calendar : { sameDay : '[Aujourd’hui à] LT', nextDay : '[Demain à] LT', nextWeek : 'dddd [à] LT', lastDay : '[Hier à] LT', lastWeek : 'dddd [dernier à] LT', sameElse : 'L' }, relativeTime : { future : 'dans %s', past : 'il y a %s', s : 'quelques secondes', m : 'une minute', mm : '%d minutes', h : 'une heure', hh : '%d heures', d : 'un jour', dd : '%d jours', M : 'un mois', MM : '%d mois', y : 'un an', yy : '%d ans' }, dayOfMonthOrdinalParse : /\d{1,2}(er|e)/, ordinal : function (number) { return number + (number === 1 ? 'er' : 'e'); }, meridiemParse : /PD|MD/, isPM : function (input) { return input.charAt(0) === 'M'; }, // In case the meridiem units are not separated around 12, then implement // this function (look at locale/id.js for an example). // meridiemHour : function (hour, meridiem) { // return /* 0-23 hour, given meridiem token and hour 1-12 */ ; // }, meridiem : function (hours, minutes, isLower) { return hours < 12 ? 'PD' : 'MD'; }, week : { dow : 1, // Monday is the first day of the week. doy : 4 // The week that contains Jan 4th is the first week of the year. } });
Once you load a locale, it becomes the active locale. To change active locales, simply call moment.locale with the key of a loaded locale.
moment.locale('fr'); moment(1316116057189).fromNow(); // il y a une heure moment.locale('en'); moment(1316116057189).fromNow(); // an hour ago
As of 2.21.0, Moment will console.warn if the locale is unavailable.
As of 2.8.0, changing the global locale doesn't affect existing instances.
moment.locale('fr'); var m = moment(1316116057189); m.fromNow(); // il y a une heure moment.locale('en'); m.fromNow(); // il y a une heure moment(1316116057189).fromNow(); // an hour ago
moment.locale returns the locale used. This is useful because Moment won't change locales if it doesn't know the one you specify.
moment.locale('fr'); // 'fr' moment.locale('tq'); // 'fr'
You may also specify a list of locales, and Moment will use the first one it has localizations for.
moment.locale(['tq', 'fr']); // 'fr'
Moment will also try locale specifier substrings from most-specific to least-specific until it finds a locale it knows. This is useful when supplying Moment with a locale string pulled from the user's environment, such as window.navigator.language.
moment.locale('en-NZ'); // 'en'
Finally, Moment will search intelligently through an array of locales and their substrings.
moment.locale(['en-NZ', 'en-AU']); // 'en-au', not 'en'
// From version 2.8.1 onward moment().locale(String|Boolean); // Deprecated version 2.8.1 moment().lang(String|Boolean);
A global locale configuration can be problematic when passing around moments that may need to be formatted into different locale.
In 1.7.0 we added instance specific locale configurations.
moment.locale('en'); // default the locale to English var localLocale = moment(); localLocale.locale('fr'); // set this instance to use French localLocale.format('LLLL'); // dimanche 15 juillet 2012 11:01 moment().format('LLLL'); // Sunday, July 15 2012 11:01 AM moment.locale('es'); // change the global locale to Spanish localLocale.format('LLLL'); // dimanche 15 juillet 2012 11:01 moment().format('LLLL'); // Domingo 15 Julio 2012 11:01 localLocale.locale(false); // reset the instance locale localLocale.format('LLLL'); // Domingo 15 Julio 2012 11:01 moment().format('LLLL'); // Domingo 15 Julio 2012 11:01
If you call moment#locale with no parameters, you get back the locale configuration that would be used for that moment.
var fr = moment().locale('fr'); fr.localeData().months(moment([2012, 0])) // "janvier" fr.locale('en'); fr.localeData().months(moment([2012, 0])) // "January"
If you need to access the locale data for a moment, this is the preferred way to do so.
As of 2.3.0, you can also specify an array of locale identifiers. It works the same was it does in the global locale configuration.
moment.locale(String);
Loading locales in NodeJS is super easy. If there is a locale file in moment-root/locale/ named after that key, the first call to moment.locale will load it.
var moment = require('moment'); moment.locale('fr'); moment(1316116057189).fromNow(); // il y a une heure
If you want your locale supported, create a pull request to the develop branch with the required locale and unit test files.
// From 2.8.1 onward moment.locale(String, Object); // Deprecated in 2.8.1 moment.lang(String, Object);
Loading locales in the browser just requires you to include the locale files. Be sure to specify the charset to prevent encoding issues.
<script src="moment.js"></script>
<script src="locale/fr.js" charset="UTF-8"></script>
<script src="locale/pt.js" charset="UTF-8"></script>
<script>
moment.locale('fr'); // Set the default/global locale
// ...
</script> There are minified versions of all locales together:
<script src="moment.js"></script> <script src="min/locales.js" charset="UTF-8"></script>
To minimize HTTP requests, use our Grunt task to compile Moment with a custom list of locales:
grunt transpile:fr,it
<script src="min/moment-with-locales.custom.js" charset="UTF-8"></script>
If you are using JSPM as plugin manager, you should add the locale in your lib.
import * as moment from 'moment'; import 'moment/locale/fr';
Note: Locale files are defined in UMD style, so they should work seamlessly in all environments.
To add your locale to Moment.js, submit a pull request with both a locale file and a test file. You can find examples in moment/src/locale/fr.js and moment/src/test/locale/fr.js.
To run the tests in Node.js, do npm install, then grunt.
If all the tests pass, submit a pull request, and thank you for contributing!
// From version 2.8.1 onward moment.locale(); // Deprecated in version 2.8.1 moment.lang();
If you are changing locales frequently, you may want to know what locale is currently being used. This is as simple as calling moment.locale without any parameters.
moment.locale('en'); // set to english moment.locale(); // returns 'en' moment.locale('fr'); // set to french moment.locale(); // returns 'fr'
As of version 2.12.0 it is possible to list all locales that have been loaded and are available to use:
moment.locales()
moment.months() moment.monthsShort() moment.weekdays() moment.weekdaysShort() moment.weekdaysMin()
It is sometimes useful to get the list of months or weekdays in a locale, for example when populating a dropdown menu.
moment.months();
Returns the list of months in the current locale.
[ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ]
Similarly, moment.monthsShort returns abbreviated month names, and moment.weekdays, moment.weekdaysShort, moment.weekdaysMin return lists of weekdays.
You can pass an integer into each of those functions to get a specific month or weekday.
moment.weekdays(3); // 'Wednesday'
As of 2.13.0 you can pass a bool as the first parameter of the weekday functions. If true, the weekdays will be returned in locale specific order. For instance, in the Arabic locale, Saturday is the first day of the week, thus:
moment.locale('ar'); moment.weekdays(true); // lists weekdays Saturday-Friday in Arabic moment.weekdays(true, 2); //will result in Monday in Arabic
Note: Absent the locale specific parameter, weekdays always have Sunday as index 0, regardless of the local first day of the week.
Some locales make special considerations into account when formatting month names. For example, Dutch formats month abbreviations without a trailing period, but only if it's formatting the month between dashes. The months method supports passing a format in so that the months will be listed in the proper context.
moment.locale('nl'); moment.monthsShort(); // ['jan.', 'feb.', 'mrt.', ...] moment.monthsShort('-MMM-'); // [ 'jan', 'feb', 'mrt', ...]
And finally, you can combine both the format option and the integer option.
moment.monthsShort('-MMM-', 3); // 'apr'
localeData = moment.localeData() localeData.months(Moment) localeData.months() localeData.monthsShort(Moment) localeData.monthsShort() localeData.monthsParse(String) localeData.weekdays(Moment) localeData.weekdays() localeData.weekdaysShort(Moment) localeData.weekdaysShort() localeData.weekdaysMin(Moment) localeData.weekdaysMin() localeData.weekdaysParse(String) localeData.longDateFormat(String) localeData.isPM(String) localeData.meridiem(Number, Number, Boolean) localeData.calendar(String, Moment) localeData.relativeTime(Number, Boolean, String, Boolean) localeData.pastFuture(Number, String) localeData.ordinal(Number) localeData.preparse(String) localeData.postformat(String) localeData.week(Moment) localeData.invalidDate() localeData.firstDayOfWeek() localeData.firstDayOfYear()
You can access the properties of the currently loaded locale through the moment.localeData(key) function. It returns the current locale or a locale with the given key:
// get current locale var currentLocaleData = moment.localeData(); var frLocaleData = moment.localeData('fr');
The returned object has the following methods:
localeData.months(aMoment); // full month name of aMoment localeData.monthsShort(aMoment); // short month name of aMoment localeData.monthsParse(longOrShortMonthString); // returns month id (0 to 11) of input localeData.weekdays(aMoment); // full weekday name of aMoment localeData.weekdaysShort(aMoment); // short weekday name of aMoment localeData.weekdaysMin(aMoment); // min weekday name of aMoment localeData.weekdaysParse(minShortOrLongWeekdayString); // returns weekday id (0 to 6) of input localeData.longDateFormat(dateFormat); // returns the full format of abbreviated date-time formats LT, L, LL and so on localeData.isPM(amPmString); // returns true iff amPmString represents PM localeData.meridiem(hours, minutes, isLower); // returns am/pm string for particular time-of-day in upper/lower case localeData.calendar(key, aMoment); // returns a format that would be used for calendar representation. Key is one of 'sameDay', 'nextDay', 'lastDay', 'nextWeek', 'prevWeek', 'sameElse' localeData.relativeTime(number, withoutSuffix, key, isFuture); // returns relative time string, key is on of 's', 'm', 'mm', 'h', 'hh', 'd', 'dd', 'M', 'MM', 'y', 'yy'. Single letter when number is 1. localeData.pastFuture(diff, relTime); // convert relTime string to past or future string depending on diff localeData.ordinal(number); // convert number to ordinal string 1 -> 1st localeData.preparse(str); // called before parsing on every input string localeData.postformat(str); // called after formatting on every string localeData.week(aMoment); // returns week-of-year of aMoment localeData.invalidDate(); // returns a translation of 'Invalid date' localeData.firstDayOfWeek(); // 0-6 (Sunday to Saturday) localeData.firstDayOfYear(); // 0-15 this and the first day of week are used // to determine which is the first week of the // year. dow == 1 and doy == 4 means week starts // Monday and first week that has Thursday is the // first week of the year (but doy is NOT simply // Thursday).
moment.locale('x-pseudo') As of version 2.13.0 moment optionally includes a pseudo locale. This locale will populate the dates with very obviously changed data. Pseudo locales can be useful when testing, as they make obvious what data has and has not been localized. Just include the pseudo-locale, and set moment's locale to x-pseudo. Text from Moment will be very easy to spot.
moment.locale('x-pseudo'); moment().format('LLL'); //14 F~ébrú~árý 2010 15:25 moment().fromNow(); //'á ~féw ~sécó~ñds á~gó' moment().calendar(); //'T~ódá~ý át 02:00'
Moment.js is very easy to customize. In general, you should create a locale setting with your customizations.
moment.locale('en-my-settings', { // customizations. });
You can remove a previously defined locale by passing null as the second argument. The deleted locale will no longer be available for use.
moment.locale('fr'); // 'fr' moment.locale('en'); // 'en' moment.locale('fr', null); moment.locale('fr'); // 'en'
As of 2.12.0 it is possible to create a locale that inherits from a parent locale.
moment.defineLocale('en-foo', { parentLocale: 'en', /* */ });
Properties that are not specified in the locale will be inherited from the parent locale.
As of 2.16.0 it is possible to define a locale with a parent that hasn't itself been defined or loaded.
moment.defineLocale('fakeLocale', {parentLocale:'xyz'})
As of 2.21.0 when attempting to create a moment with the newly defined locale, moment will attempt to lazy load the parent if it exists. Failing that it will default the parent to the global locale.
As of 2.12.0 it is also possible to update a locale's properties.
moment.updateLocale('en', { /**/ });
Any properties specified will be updated, while others will remain the same. This function does not affect moments that already exist.
To revert an update use:
moment.updateLocale('en', null);
2.12.0 deprecated using moment.locale() to change an existing locale. Use moment.updateLocale() instead.
// From 2.12.0 onward moment.updateLocale('en', { months : String[] }); moment.updateLocale('en', { months : Function }); moment.updateLocale('en', { months : { format : String[], standalone : String[] } }); // From 2.11.0 moment.locale('en', { months : { format : String[], standalone : String[] } }); // From 2.8.1 to 2.11.2 moment.locale('en', { months : String[] }); moment.locale('en', { months : Function }); // Deprecated in 2.8.1 moment.lang('en', { months : String[] }); moment.lang('en', { months : Function });
Locale#months should be an array of the month names.
moment.updateLocale('en', { months : [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ] });
If you need more processing to calculate the name of the month, (for example, if there is different grammar for different formats), Locale#months can be a function with the following signature. It should always return a month name.
moment.updateLocale('en', { months : function (momentToFormat, format) { // momentToFormat is the moment currently being formatted // format is the formatting string if (/^MMMM/.test(format)) { // if the format starts with 'MMMM' return nominative[momentToFormat.month()]; } else { return subjective[momentToFormat.month()]; } } });
From version 2.11.0 months can also be an object, specifying standalone and format forms (nominative and accusative). The regular expression that is run on the format to check whether to use the format form is /D[oD]?(\[[^\[\]]*\]|\s+)+MMMM?/. From version 2.14.0 a different one can be specified with the isFormat key.
moment.updateLocale('en', { months : { format: 'sausio_vasario_kovo_balandžio_gegužės_birželio_liepos_rugpjūčio_rugsėjo_spalio_lapkričio_gruodžio'.split('_'), standalone: 'sausis_vasaris_kovas_balandis_gegužė_birželis_liepa_rugpjūtis_rugsėjis_spalis_lapkritis_gruodis'.split('_'), isFormat: /D[oD]?(\[[^\[\]]*\]|\s+)+MMMM?|MMMM?(\[[^\[\]]*\]|\s+)+D[oD]?/ // from 2.14.0 } });
// From 2.12.0 onward moment.updateLocale('en', { monthsShort : String[] }); moment.updateLocale('en', { monthsShort : Function }); moment.updateLocale('en', { monthsShort : { format: String[], standalone : String[] } }); // From 2.11.0 moment.locale('en', { monthsShort : { format: String[], standalone : String[] } }); // From 2.8.1 to 2.11.2 moment.locale('en', { monthsShort : String[] }); moment.locale('en', { monthsShort : Function }); // Deprecated in 2.8.1 moment.lang('en', { monthsShort : String[] }); moment.lang('en', { monthsShort : Function });
Locale#monthsShort should be an array of the month abbreviations.
moment.updateLocale('en', { monthsShort : [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ] });
Like Locale#months, Locale#monthsShort can be a callback function as well.
moment.updateLocale('en', { monthsShort : function (momentToFormat, format) { if (/^MMMM/.test(format)) { return nominative[momentToFormat.month()]; } else { return subjective[momentToFormat.month()]; } } });
Note: From version 2.11.0, like Locale#months, Locale#monthsShort can be an object with standalone and format cases.
moment.updateLocale('en', { monthsShort : { format: 'янв_фев_мар_апр_мая_июня_июля_авг_сен_окт_ноя_дек'.split('_'), standalone: 'янв_фев_март_апр_май_июнь_июль_авг_сен_окт_ноя_дек'.split('_') } });
// From version 2.12.0 onward moment.updateLocale('en', { weekdays : String[] }); moment.updateLocale('en', { weekdays : Function }); moment.updateLocale('en', { weekdays : { standalone : String[], format : String[], isFormat : RegExp } }); // From version 2.11.0 moment.locale('en', { weekdays : { standalone : String[], format : String[], isFormat : Boolean } }); // From version 2.8.1 to 2.11.2 moment.locale('en', { weekdays : String[] }); moment.locale('en', { weekdays : Function }); // Deprecated version 2.8.1 moment.lang('en', { weekdays : String[] }); moment.lang('en', { weekdays : Function });
Locale#weekdays should be an array of the weekdays names.
moment.updateLocale('en', { weekdays : [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ] });
Locale#weekdays can be a callback function as well.
moment.updateLocale('en', { weekdays : function (momentToFormat, format) { return weekdays[momentToFormat.day()]; } });
Note: From version 2.11.0 format/standalone cases can be passed as well. isFormat will be used against the full format string to determine which form to use.
moment.updateLocale('en', { weekdays : { standalone: 'Воскресенье_Понедельник_Вторник_Среда_Четверг_Пятница_Суббота'.split('_'), format: 'Воскресенье_Понедельник_Вторник_Среду_Четверг_Пятницу_Субботу'.split('_'), isFormat: /\[ ?[Вв] ?(?:прошлую|следующую|эту)? ?\] ?dddd/ } });
// From 2.12.0 onward moment.updateLocale('en', { weekdaysShort : String[] }); moment.updateLocale('en', { weekdaysShort : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { weekdaysShort : String[] }); moment.locale('en', { weekdaysShort : Function }); // Deprecated in 2.8.1 moment.lang('en', { weekdaysShort : String[] }); moment.lang('en', { weekdaysShort : Function });
Locale#weekdaysShort should be an array of the weekdays abbreviations.
moment.updateLocale('en', { weekdaysShort : ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"] });
Locale#weekdaysShort can be a callback function as well.
moment.updateLocale('en', { weekdaysShort : function (momentToFormat, format) { return weekdaysShort[momentToFormat.day()]; } });
// From 2.12.0 onward moment.updateLocale('en', { weekdaysMin : String[] }); moment.updateLocale('en', { weekdaysMin : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { weekdaysMin : String[] }); moment.locale('en', { weekdaysMin : Function }); // Deprecated in 2.8.1 moment.lang('en', { weekdaysMin : String[] }); moment.lang('en', { weekdaysMin : Function });
Locale#weekdaysMin should be an array of two letter weekday abbreviations. The purpose of these is for things like calendar pickers, thus they should be as small as possible.
moment.updateLocale('en', { weekdaysMin : ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"] });
Locale#weekdaysMin can be a callback function as well.
moment.updateLocale('en', { weekdaysMin : function (momentToFormat, format) { return weekdaysMin[momentToFormat.day()]; } });
// From 2.12.0 onward moment.updateLocale('en', { weekdaysMin : String[] }); moment.updateLocale('en', { weekdaysMin : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { longDateFormat : Object }); // Deprecated in 2.8.1 moment.lang('en', { longDateFormat : Object });
Locale#longDateFormat should be an object containing a key/value pair for each long date format L LL LLL LLLL LT LTS. LT should be the time format, and is also used for moment#calendar.
moment.updateLocale('en', { longDateFormat : { LT: "h:mm A", LTS: "h:mm:ss A", L: "MM/DD/YYYY", l: "M/D/YYYY", LL: "MMMM Do YYYY", ll: "MMM D YYYY", LLL: "MMMM Do YYYY LT", lll: "MMM D YYYY LT", LLLL: "dddd, MMMM Do YYYY LT", llll: "ddd, MMM D YYYY LT" } });
You can eliminate the lowercase l tokens and they will be created automatically by replacing long tokens with the short token variants.
moment.updateLocale('en', { longDateFormat : { LT: "h:mm A", LTS: "h:mm:ss A", L: "MM/DD/YYYY", LL: "MMMM Do YYYY", LLL: "MMMM Do YYYY LT", LLLL: "dddd, MMMM Do YYYY LT" } });
// From 2.12.0 onward moment.updateLocale('en', { relativeTime : Object }); // From 2.8.1 to 2.11.2 moment.locale('en', { relativeTime : Object }); // Deprecated in 2.8.1 moment.lang('en', { relativeTime : Object });
Locale#relativeTime should be an object of the replacement strings for moment#from.
moment.updateLocale('en', { relativeTime : { future: "in %s", past: "%s ago", s : 'a few seconds', ss : '%d seconds', m: "a minute", mm: "%d minutes", h: "an hour", hh: "%d hours", d: "a day", dd: "%d days", M: "a month", MM: "%d months", y: "a year", yy: "%d years" } });
Locale#relativeTime.future refers to the prefix/suffix for future dates, and Locale#relativeTime.past refers to the prefix/suffix for past dates. For all others, a single character refers to the singular, and a double character refers to the plural.
If a locale requires additional processing for a token, it can set the token as a function with the following signature. The function should return a string.
function (number, withoutSuffix, key, isFuture) { return string; }
The key argument refers to the replacement key in the Locale#relativeTime object. (eg. s m mm h, etc.)
The number argument refers to the number of units for that key. For m, the number is the number of minutes, etc.
The withoutSuffix argument will be true if the token will be displayed without a suffix, and false if it will be displayed with a suffix. (The reason for the inverted logic is because the default behavior is to display with the suffix.)
The isFuture argument will be true if it is going to use the future suffix/prefix and false if it is going to use the past prefix/suffix. The isFuture argument was added in version 1.6.0.
// From 2.12.0 onward moment.updateLocale('en', { meridiem : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { meridiem : Function }); // Deprecated in 2.8.1 moment.lang('en', { meridiem : Function });
If your locale uses 'am/pm', Locale#meridiem can be omitted, as those values are the defaults.
If your locale needs any different computation for am/pm, Locale#meridiem should be a callback function that returns the correct string based on hour, minute, and upper/lowercase.
moment.updateLocale('zh-cn', { meridiem : function (hour, minute, isLowercase) { if (hour < 9) { return "早上"; } else if (hour < 11 && minute < 30) { return "上午"; } else if (hour < 13 && minute < 30) { return "中午"; } else if (hour < 18) { return "下午"; } else { return "晚上"; } } });
Before version 1.6.0, Locale#meridiem was a map of upper and lowercase versions of am/pm.
moment.updateLocale('en', { meridiem : { am : 'am', AM : 'AM', pm : 'pm', PM : 'PM' } });
This has been deprecated. The 1.6.0 callback function syntax is now used instead.
// From 2.12.0 onward moment.updateLocale('en', { meridiemParse : RegExp isPM : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { meridiemParse : RegExp isPM : Function }); // Deprecated in 2.8.1 moment.lang('en', { meridiemParse : RegExp isPM : Function });
Locale#isPM should return true if the input string is past 12 noon. This is used in parsing the a A tokens.
moment.updateLocale('en', { isPM : function (input) { return ((input + '').toLowerCase()[0] === 'p'); } });
To configure what strings should be parsed as input, set the meridiemParse property.
moment.updateLocale('en', { meridiemParse : /[ap]\.?m?\.?/i });
// From 2.12.0 onward moment.updateLocale('en', { calendar : Object }); // From 2.8.1 to 2.11.2 moment.locale('en', { calendar : Object }); // Deprecated in 2.8.1 moment.lang('en', { calendar : Object });
Locale#calendar should have the following formatting strings.
moment.locale('en', { calendar : { lastDay : '[Yesterday at] LT', sameDay : '[Today at] LT', nextDay : '[Tomorrow at] LT', lastWeek : '[last] dddd [at] LT', nextWeek : 'dddd [at] LT', sameElse : 'L' } });
Each of the Locale#calendar keys can also be a callback function with the scope of the current moment and first argument a moment that depicts now. It should return a formatting string.
function callback (now) { return '[hoy a la' + ((this.hours() !== 1) ? 's' : '') + '] LT'; }
moment.calendarFormat = Function
This lets you modify the tokens used by calendar.
moment.calendarFormat = function (myMoment, now) { var diff = myMoment.diff(now, 'days', true); var nextMonth = now.clone().add(1, 'month'); var retVal = diff < -6 ? 'sameElse' : diff < -1 ? 'lastWeek' : diff < 0 ? 'lastDay' : diff < 1 ? 'sameDay' : diff < 2 ? 'nextDay' : diff < 7 ? 'nextWeek' : // introduce thisMonth and nextMonth (myMoment.month() === now.month() && myMoment.year() === now.year()) ? 'thisMonth' : (nextMonth.month() === myMoment.month() && nextMonth.year() === myMoment.year()) ? 'nextMonth' : 'sameElse'; return retVal; };
// From 2.12.0 onward moment.updateLocale('en', { ordinal : Function }); // From 2.8.1 to 2.11.2 moment.locale('en', { ordinal : Function }); // Deprecated in 2.8.1 moment.lang('en', { ordinal : Function });
Locale#ordinal should be a function that returns the ordinal for a given number.
moment.updateLocale('en', { ordinal : function (number, token) { var b = number % 10; var output = (~~ (number % 100 / 10) === 1) ? 'th' : (b === 1) ? 'st' : (b === 2) ? 'nd' : (b === 3) ? 'rd' : 'th'; return number + output; } });
As of 2.0.0, the ordinal function should return both the number and the ordinal. Previously, only the ordinal was returned.
As of 2.1.0, the token parameter was added. It is a string of the token that is being ordinalized, for example: M or d.
For more information on ordinal numbers, see Wikipedia.
moment.relativeTimeThreshold(unit); // getter moment.relativeTimeThreshold(unit, limit); // setter
duration.humanize has thresholds which define when a unit is considered a minute, an hour and so on. For example, by default more than 45 seconds is considered a minute, more than 22 hours is considered a day and so on. To change those cutoffs use moment.relativeTimeThreshold(unit, limit) where unit is one of ss, s, m, h, d, M.
| unit | meaning | usage |
|---|---|---|
| ss | a few seconds | least number of seconds to be considered seconds. Must be set after setting the s unit or without setting the s unit. |
| s | seconds | least number of seconds to be considered a minute. |
| m | minutes | least number of minutes to be considered an hour. |
| h | hours | least number of hours to be considered a day. |
| d | days | least number of days to be considered a month. |
| M | months | least number of months to be considered a year. |
// Retrieve existing thresholds moment.relativeTimeThreshold('ss'); // 44 moment.relativeTimeThreshold('s'); // 45 moment.relativeTimeThreshold('m'); // 45 moment.relativeTimeThreshold('h'); // 22 moment.relativeTimeThreshold('d'); // 26 moment.relativeTimeThreshold('M'); // 11 // Set new thresholds moment.relativeTimeThreshold('ss', 3); moment.relativeTimeThreshold('s', 40); moment.relativeTimeThreshold('m', 40); moment.relativeTimeThreshold('h', 20); moment.relativeTimeThreshold('d', 25); moment.relativeTimeThreshold('M', 10);
Note: Retrieving thresholds was added in 2.8.1.
Note: Retrieving and setting ss threshold was added in 2.18.0.
moment.relativeTimeRounding(); // getter moment.relativeTimeRounding(fn); // setter
duration.humanize rounds a possibly double value before supplying it to the relativeTime format string specified in the locale. To control the rounding you can use moment.relativeTimeRounding.
var roundingDefault = moment.relativeTimeRounding(); // Round relative time evaluation down moment.relativeTimeRounding(Math.floor); moment.relativeTimeThreshold('s', 60); moment.relativeTimeThreshold('m', 60); moment.relativeTimeThreshold('h', 24); moment.relativeTimeThreshold('d', 31); moment.relativeTimeThreshold('M', 12); var a = moment(); a.subtract({hours: 23, minutes: 59, seconds: 59}); a.toNow() // == 'in 23 hours' 'Round down towards the nearest hour' // back to default moment.relativeTimeRounding(roundingDefault);
You can even choose to do no rounding at all:
var retainValue = function (value) { return value; }; moment.relativeTimeRounding(retainValue); var a = moment(); a.subtract({hours: 39}); a.toNow() // == 'in 1.625 days', 'Round down towards the nearest year'
moment.now = function () { return +new Date(); }
If you want to change the time that Moment sees, you can specify a method that returns the number of milliseconds since the Unix epoch (January 1, 1970).
The default is:
moment.now = function () { return +new Date(); }
This will be used when calling moment(), and the current date used when tokens are omitted from format(). In general, any method that needs the current time uses this under the hood.
Moment.js also has duration objects. Where a moment is defined as single points in time, durations are defined as a length of time.
Durations do not have a defined beginning and end date. They are contextless.
A duration is conceptually more similar to '2 hours' than to 'between 2 and 4 pm today'. As such, they are not a good solution to converting between units that depend on context.
For example, a year can be defined as 366 days, 365 days, 365.25 days, 12 months, or 52 weeks. Trying to convert years to days makes no sense without context. It is much better to use moment#diff for calculating days or years between two moments than to use Durations.
moment.duration(Number, String); moment.duration(Number); moment.duration(Object); moment.duration(String);
To create a duration, call moment.duration() with the length of time in milliseconds.
moment.duration(100); // 100 milliseconds
If you want to create a moment with a unit of measurement other than milliseconds, you can pass the unit of measurement as well.
moment.duration(2, 'seconds'); moment.duration(2, 'minutes'); moment.duration(2, 'hours'); moment.duration(2, 'days'); moment.duration(2, 'weeks'); moment.duration(2, 'months'); moment.duration(2, 'years');
The same shorthand for moment#add and moment#subtract works here as well.
| Key | Shorthand |
|---|---|
| years | y |
| months | M |
| weeks | w |
| days | d |
| hours | h |
| minutes | m |
| seconds | s |
| milliseconds | ms |
Much like moment#add, you can pass an object of values if you need multiple different units of measurement.
moment.duration({
seconds: 2,
minutes: 2,
hours: 2,
days: 2,
weeks: 2,
months: 2,
years: 2
}); As of 2.1.0, moment supports parsing ASP.NET style time spans. The following formats are supported.
The format is an hour, minute, second string separated by colons like 23:59:59. The number of days can be prefixed with a dot separator like so 7.23:59:59. Partial seconds are supported as well 23:59:59.999.
moment.duration('23:59:59'); moment.duration('23:59:59.999'); moment.duration('7.23:59:59.999'); moment.duration('23:59'); // added in 2.3.0
As of 2.3.0, moment also supports parsing ISO 8601 durations.
moment.duration('P1Y2M3DT4H5M6S'); moment.duration('P1M');
As of 2.11.0, duration format strings with a space between days and rest is supported.
moment.duration('7 23:59:59.999'); As of 2.13.0, mixed negative and positive signs are supported when parsing durations.
moment.duration('PT-6H3M') As of 2.18.0, invalid durations are supported, similarly to invalid moments. To create an invalid duration you can pass NaN for a value of a unit.
In upcoming releases expect invalid durations to cover more cases (like null values for units).
moment.duration(NaN); moment.duration(NaN, 'days'); moment.duration.invalid();
moment.duration().clone();
Create a clone of a duration. Durations are mutable, just like moment objects, so this lets you get a snapshot, at some point in time.
var d1 = moment.duration(); var d2 = d1.clone(); d1.add(1, 'second'); d1.asMilliseconds() !== d2.asMilliseconds();
moment.duration().humanize();
Sometimes, you want all the goodness of moment#from but you don't want to have to create two moments, you just want to display a length of time.
Enter moment.duration().humanize().
moment.duration(1, "minutes").humanize(); // a minute moment.duration(2, "minutes").humanize(); // 2 minutes moment.duration(24, "hours").humanize(); // a day
By default, the return string is suffixless. If you want a suffix, pass in true as seen below.
moment.duration(1, "minutes").humanize(true); // in a minute
For suffixes before now, pass in a negative number.
moment.duration(-1, "minutes").humanize(true); // a minute ago
Invalid durations are humanized to the localized version of Invalid Date.
moment.duration.invalid().humanize(); // Invalid Date moment.duration().milliseconds(); moment.duration().asMilliseconds();
To get the number of milliseconds in a duration, use moment.duration().milliseconds().
It will return a number between 0 and 999.
moment.duration(500).milliseconds(); // 500 moment.duration(1500).milliseconds(); // 500 moment.duration(15000).milliseconds(); // 0
If you want the length of the duration in milliseconds, use moment.duration().asMilliseconds() instead.
moment.duration(500).asMilliseconds(); // 500 moment.duration(1500).asMilliseconds(); // 1500 moment.duration(15000).asMilliseconds(); // 15000
moment.duration().seconds(); moment.duration().asSeconds();
To get the number of seconds in a duration, use moment.duration().seconds().
It will return a number between 0 and 59.
moment.duration(500).seconds(); // 0 moment.duration(1500).seconds(); // 1 moment.duration(15000).seconds(); // 15
If you want the length of the duration in seconds, use moment.duration().asSeconds() instead.
moment.duration(500).asSeconds(); // 0.5 moment.duration(1500).asSeconds(); // 1.5 moment.duration(15000).asSeconds(); // 15
moment.duration().minutes(); moment.duration().asMinutes();
As with the other getters for durations, moment.duration().minutes() gets the minutes (0 - 59).
moment.duration().asMinutes() gets the length of the duration in minutes.
moment.duration().hours(); moment.duration().asHours();
As with the other getters for durations, moment.duration().hours() gets the hours (0 - 23).
moment.duration().asHours() gets the length of the duration in hours.
moment.duration().days(); moment.duration().asDays();
As with the other getters for durations, moment.duration().days() gets the days (0 - 30).
moment.duration().asDays() gets the length of the duration in days.
moment.duration().weeks(); moment.duration().asWeeks();
As with the other getters for durations, moment.duration().weeks() gets the weeks (0 - 4).
moment.duration().asWeeks() gets the length of the duration in weeks.
Pay attention that unlike the other getters for duration, weeks are counted as a subset of the days, and are not taken off the days count.
Note: The length of a duration in weeks is defined as 7 days.
moment.duration().months(); moment.duration().asMonths();
As with the other getters for durations, moment.duration().months() gets the months (0 - 11).
moment.duration().asMonths() gets the length of the duration in months.
moment.duration().years(); moment.duration().asYears();
As with the other getters for durations, moment.duration().years() gets the years.
moment.duration().asYears() gets the length of the duration in years.
moment.duration().add(Number, String); moment.duration().add(Number); moment.duration().add(Duration); moment.duration().add(Object);
Mutates the original duration by adding time.
The same keys and shorthands used to create durations can be used here as the second argument.
var a = moment.duration(1, 'd'); var b = moment.duration(2, 'd'); a.add(b).days(); // 3
Note that adding an invalid duration to any other duration results in an invalid duration.
moment.duration().subtract(Number, String); moment.duration().subtract(Number); moment.duration().subtract(Duration); moment.duration().subtract(Object);
Mutates the original duration by subtracting time.
The same keys and shorthands used to create durations can be used here as the second argument.
var a = moment.duration(3, 'd'); var b = moment.duration(2, 'd'); a.subtract(b).days(); // 1
Note that adding an invalid duration to any other duration results in an invalid duration.
var duration = moment.duration(x.diff(y)) You can also use duration with moment#diff to get the duration between two moments. To do so, simply pass the moment#diff method into moment#duration as follows:
var x = new moment() var y = new moment() var duration = moment.duration(x.diff(y)) // returns duration object with the duration between x and y
See here for more information about moment#diff.
moment.duration().as(String);
As an alternate to Duration#asX, you can use Duration#as('x'). All the shorthand keys from moment#add apply here as well.
duration.as('hours'); duration.as('minutes'); duration.as('seconds'); duration.as('milliseconds');
Invalid durations return NaN for all units.
moment.duration().get(String);
As an alternate to Duration#x() getters, you can use Duration#get('x'). All the shorthand keys from moment#add apply here as well.
duration.get('hours'); duration.get('minutes'); duration.get('seconds'); duration.get('milliseconds');
Invalid durations return NaN for all units.
moment.duration().toJSON();
When serializing a duration object to JSON, it will be represented as an ISO8601 string.
JSON.stringify({
postDuration : moment.duration(5, 'm')
}); // '{"postDuration":"PT5M"}' Invalid durations return Invalid Date as json representation.
moment.isDuration(obj);
To check if a variable is a moment duration object, use moment.isDuration().
moment.isDuration() // false moment.isDuration(new Date()) // false moment.isDuration(moment()) // false moment.isDuration(moment.duration()) // true moment.isDuration(moment.duration(2, 'minutes')) // true
moment.duration().toISOString();
Returns duration in string as specified by ISO 8601 standard.
moment.duration(1, 'd').toISOString() // "P1D"
Format PnYnMnDTnHnMnS description:
| Unit | Meaning |
|---|---|
| P | P stands for period. Placed at the start of the duration representation. |
| Y | Year |
| M | Month |
| D | Day |
| T | Designator that precedes the time components. |
| H | Hour |
| M | Minute |
| S | Second |
moment.duration().locale(); moment.duration().locale(String);
You can get or set the locale of a duration using locale(...). The locale will affect the duration's string methods, like humanize(). See the intl section for more information on internationalization generally.
moment.duration(1, "minutes").locale("en").humanize(); // a minute moment.duration(1, "minutes").locale("fr").humanize(); // une minute moment.duration(1, "minutes").locale("es").humanize(); // un minuto
Suffixes in humanize() are also internationalized:
moment.duration(1, "minutes").locale("en").humanize(true); // in a minute moment.duration(1, "minutes").locale("fr").humanize(true); // dans une minute moment.duration(1, "minutes").locale("es").humanize(true); // en un minuto moment.duration(-1, "minutes").locale("en").humanize(true); // a minute ago moment.duration(-1, "minutes").locale("fr").humanize(true); // il y a une minute moment.duration(-1, "minutes").locale("es").humanize(true); // hace un minuto
Moment exposes some methods which may be useful to people extending the library or writing custom parsers.
moment.normalizeUnits(String);
Many of Moment's functions allow the caller to pass in aliases for unit enums. For example, all of the gets below are equivalent.
var m = moment(); m.get('y'); m.get('year'); m.get('years');
If you're extending the library, you may want access to Moment's facilities for that in order to better align your functionality with Moment's.
moment.normalizeUnits('y'); // 'year' moment.normalizeUnits('Y'); // 'year' moment.normalizeUnits('year'); // 'year' moment.normalizeUnits('years'); // 'year' moment.normalizeUnits('YeARS'); // 'year'
moment.invalid(Object);
You can create your own invalid Moment objects, which is useful in making your own parser.
var m = moment.invalid(); m.isValid(); // false m.format(); // 'Invalid date' m.parsingFlags().userInvalidated; // true
invalid also accepts an object which specifies which parsing flags to set. This will not set the userInvalidated parsing flag unless it's one of the properties specified.
var m = moment.invalid({invalidMonth: 'Actober'}); m.parsingFlags().invalidMonth; // 'Actober'
You need not specify parsing flags recognized by Moment; the Moment will be invalid nonetheless, and the parsing flags will be returned by parsingFlags().
Some other people have made plugins for Moment.js that may be useful to you.
npm install moment-strftime
If you are more comfortable working with strftime instead of LDML-like parsing tokens, you can use Ben Oakes' plugin moment-strftime.
The repository is located at github.com/benjaminoakes/moment-strftime.
If you are using OLE Automation dates in .NET check out Markit On Demand's moment-msdate. Using this plugin allows you to format OA dates into JavaScript dates and vice-versa.
Convert a moment to an OA date:
moment().toOADate(); // a floating point number Or, convert an OA date to a moment:
moment.fromOADate(41493); // Wed Aug 07 2013 00:00:00 GMT-0600 (MDT)
More information and detailed docs can be found on GitHub at http://markitondemand.github.io/moment-msdate/.
npm install moment-jdateformatparser
If you want to work with the java.text.DateFormat you can use this plugin.
For example,
moment("2013-12-24 14:30").formatWithJDF("dd.MM.yyyy"); // returns the formatted date "24.12.2013" moment().toJDFString("DD.MM.YYYY"); // returns the Java format pattern "dd.MM.yyyy"
The repository is located at github.com/MadMG/moment-jdateformatparser.
npm install moment-range
If you need to work with date ranges, you can use Gianni Chiappetta's plugin moment-range.
Documentation can be found on the homepage github.com/rotaready/moment-range.
And it is also available for the web at the repository below.
The repository is located at github.com/rotaready/moment-range.
npm install twix
Another range plugin is Isaac Cambron's library Twix. It has many range-related features and excels at formatting ranges readably. For example,
var t = moment("1/25/1982 9:30 AM").twix("1/25/1982 1:30 PM"); t.isCurrent(); // false t.count('minutes'); // 241 t.format(); // 'Jan 25, 1982, 9:30 AM - 1:30 PM' t.simpleFormat("h:m"); // '9:30 - 1:30'
Full documentation of all the options and features is here.
It's available on npm like so:
npm install twix
Or just grab the JS file from here.
npm install moment-precise-range-plugin
The Precise Range plugin, written by Rob Dawson, can be used to display exact, human-readable representations of date/time ranges:
moment("2014-01-01 12:00:00").preciseDiff("2015-03-04 16:05:06"); // 1 year 2 months 3 days 4 hours 5 minutes 6 seconds
moment.preciseDiff("2014-01-01 12:00:00", "2014-04-20 12:00:00"); // 3 months 19 days
To obtain the raw numeric values rather than a string, pass the value true as the third argument to the method:
moment.preciseDiff(m1, m2, true); // {years : 0, months : 1, days : 2, hours : 3, minutes : 4, seconds : 5, firstDateWasLater : false}
npm install moment-isocalendar
If you are looking for a Python-like isocalendar method, you can use Rocky Meza's plugin
moment-isocalendar
Calling the isocalendar method on a moment will return an array like the following:
[year, week_of_year, day_of_week, minutes_since_midnight]
moment().isocalendar(); // [2012, 8, 5, 870] You can also reconstruct a moment from a isocalendar array.
moment.fromIsocalendar([2011, 51, 5, 870]).format('LLLL'); // "Friday, December 23 2011 2:30 PM"
The repository is located at github.com/fusionbox/moment-isocalendar.
npm install moment-jalaali
If you want to work with Jalaali calendar system (Jalali, Persian, Khorshidi or Shamsi), you can use Behrang Noruzi Niya's plugin moment-jalaali.
When installed, it will wrap moment and moment will be able to format and parse Jalaali years and months. Here is a short example:
var m = moment('1360/5/26', 'jYYYY/jM/jD'); // Parse a Jalaali date. m.format('jYYYY/jM/jD [is] YYYY/M/D'); // 1360/5/26 is 1981/8/17
The repository is located at github.com/behrang/moment-jalaali.
npm install moment-hijri
If you want to work with Hijri calendar then you can use moment-hijri plugin. moment-hijri is a moment plugin for the Hijri lunar calendar based on Umm al-Qura calculations. This plugin is developed by Suhail Alkowaileet.
When you install it, it will wrap moment and you will be able to parse Hijri dates. Here is a short example:
m = moment('1410/8/28', 'iYYYY/iM/iD'); // Parse a Hijri date. m.format('iYYYY/iM/iD [is] YYYY/M/D'); // 1410/8/28 is 1990/3/25
The repository is located at github.com/xsoh/moment-hijri.
npm install moment-recur
If you need to work with recurring dates, you can use Casey Trimm's plugin moment-recur.
This plugin will allow you to create length-based intervals (days, weeks, etc.) and calendar-based intervals (daysOfMonth, monthsOfYear, etc.).
It provides a matches function to test whether a date recurs according to the rules set, as well as generator functions to get the next and previous dates in a series.
The repository, documentation, and many more examples can be found at github.com/c-trimm/moment-recur
var interval = moment( "01/01/2014" ).recur().every(2).days(); // Length Interval interval.matches( "01/03/2014" ); // true interval.next( 2, "L" ); // ["01/03/2014", "01/05/2014"] interval.forget( "days" ); // Remove a rule interval.dayOfMonth( 10 ); // Calendar Interval interval.matches( "05/10/2014" ); // true interval.previous( 2, "L" ); // ["12/10/2013", "11/10/2013"]
If you're trying to format times for tweets like the way Twitter does, you can use the moment.twitter plugin by @hijonathan.
It's a simple way to display both short and long versions of human-readable timestamps.
moment().subtract(5, 'hours').twitterLong(); // 5 hours
Yes, it does smart pluralization.
moment().subtract(1, 'hour').twitterLong(); // 1 hour
Not short enough for you?
moment().subtract(6, 'days').twitterShort(); // 6d
If you ever have need for Fiscal, Calendar or Academic quarters, you can use the moment-fquarter plugin by @robgallen.
At its simplest, just call the fquarter method on any moment object. It returns a formatted string with April being the first quarter.
moment("2013-01-01").fquarter(); // Q4 2012/13
You can pass in any month as the starting quarter, e.g. July
moment("2013-01-01").fquarter(7); // Q3 2012/13
If you want calendar quarters, start in January
moment("2013-01-01").fquarter(1); // Q1 2013
npm install moment-parseformat
This plugin extracts the format of a date/time string.
var format = moment.parseFormat('Thursday, February 6th, 2014 9:20pm'); // dddd, MMMM Do, YYYY h:mma moment().format(format); // format
That allows to create smart date inputs that let your users set a Date/Time and lets you extract the user's preferred format for future usage. Find an example usage of it at minutes.io.
The Plugin has been authored by @gr2m. Links: Demo | Source
npm install moment-round
This plugin will round date/time to a given interval.
For example,
var m = new moment(); // 2015-06-18 15:30:19 moment.round(5, 'seconds'); // 2015-06-18 15:30:20 moment.ceil(3, 'minutes'); // 2015-06-18 15:33:00 moment.floor(16, 'hours'); // 2015-06-18 00:00:00 moment.ceil(21, 'hours'); // 2015-06-18 21:00:00 moment.ceil(20, 'hours'); // 2015-06-19 00:00:00
The repository is located at github.com/WebDevTmas/moment-round.
bower install moment-transform
moment-transform is a plugin that manipulated dates through patterns. You can use basic operations –set/add/subtract– on individual parts (hours, month, …) of a Moment instance.
moment().transform('YYYY-MM-+01 00:00:00.000'); // Tonight at midnight moment().transform('14:30:00.000'); // Today, 2:30 pm moment().transform('YYYY-MM--30 00:00:00.000'); // 30 days ago
Optional parameters lets you specify custom patterns and force strict pattern usage (non-alphabetic characters are not mandatory in passed string by default).
moment().transform('+01MMYYYY', 'DD/MM/YYYY', false); // Tomorrow, same time moment().transform('+01MMYYYY', 'DD/MM/YYYY', true); // Invalid date
You can see it live there while the repository is here.
npm install moment-taiwan
If you want to work with Taiwan calendar system , you can use Bradwoo8621's plugin moment-taiwan.
When installed, it will wrap moment and moment will be able to format and parse Taiwan years. Here is a short example:
m = moment('104/01/01', 'tYY/MM/DD') // Parse a Taiwan date m.format('tYY/MM/DD [is] YYYY/M/D') // 104/01/01 is 2015/01/01 m.twYear() // 104
The repository is located at github.com/bradwoo8621/moment-taiwan.
npm install moment-duration-format
This is a plugin that will allow comprehensive formatting of Moment Durations.
For example,
moment.duration(123, "minutes").format("h:mm"); // "2:03"
The repository is located at github.com/jsmreese/moment-duration-format.
npm install moment-timer
This is a Moment.js plugin that allows the use of timers, which offer much more control than the native JavaScript timers. It's basically a rewrite of JavaScripts own setInterval and setTimeout.
For example,
var timer = moment.duration(5, "seconds").timer({loop: true}, function() { // Callback });
The repository is located at github.com/SeverinDK/moment-timer.
npm install moment-business
This is a Moment.js library that allows Moment operations for Western work weeks: 7 day weeks where Saturday and Sunday are non-work days.
For example,
import business from 'moment-business'; // true if the moment is Mon-Fri, false otherwise business.isWeekDay(someMoment); // Adds five work days to the Moment business.addWeekDays(someMoment, 5);
The repository is located at github.com/jmeas/moment-business.
If you want to format times in a short way, you can use the moment-shortformat plugin by @researchgate.
It is based on and similar to the moment.twitter plugin but has a different output.
moment().subtract(5, 'hours').short(); // 5h ago moment().add(5, 'hours').short(); // in 5h
You can also disable the use of the relative time templates
moment().subtract(1, 'hour').short(false); // 1h
If the date is too far in the future or the past it will display like that
moment().subtract(500, 'days').short(); // 5 Mar, 1970
© JS Foundation and other contributors
Licensed under the MIT License.
http://momentjs.com/docs/