The Intl.DateTimeFormat
object enables language-sensitive date and time formatting.
Intl.DateTimeFormat
Try it
Constructor
-
Intl.DateTimeFormat()
-
Creates a new
Intl.DateTimeFormat
object.
Static methods
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Intl.DateTimeFormat.supportedLocalesOf()
-
Returns an array containing those of the provided locales that are supported without having to fall back to the runtime's default locale.
Instance methods
-
Intl.DateTimeFormat.prototype.format()
-
Getter function that formats a date according to the locale and formatting options of this
DateTimeFormat
object. -
Intl.DateTimeFormat.prototype.formatToParts()
-
Returns an
Array
of objects representing the date string in parts that can be used for custom locale-aware formatting. -
Intl.DateTimeFormat.prototype.resolvedOptions()
-
Returns a new object with properties reflecting the locale and formatting options computed during initialization of the object.
-
Intl.DateTimeFormat.prototype.formatRange()
-
This method receives two Dates and formats the date range in the most concise way based on the locale and options provided when instantiating
DateTimeFormat
. -
Intl.DateTimeFormat.prototype.formatRangeToParts()
-
This method receives two Dates and returns an Array of objects containing the locale-specific tokens representing each part of the formatted date range.
Examples
Using DateTimeFormat
In basic use without specifying a locale, DateTimeFormat
uses the default locale and default options.
var date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0)); // toLocaleString without arguments depends on the implementation, // the default locale, and the default time zone console.log(new Intl.DateTimeFormat().format(date)); // → "12/19/2012" if run with en-US locale (language) and time zone America/Los_Angeles (UTC-0800)
Using locales
This example shows some of the variations in localized date and time formats. In order to get the format of the language used in the user interface of your application, make sure to specify that language (and possibly some fallback languages) using the locales
argument:
var date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0)); // Results below use the time zone of America/Los_Angeles (UTC-0800, Pacific Standard Time) // US English uses month-day-year order console.log(new Intl.DateTimeFormat('en-US').format(date)); // → "12/19/2012" // British English uses day-month-year order console.log(new Intl.DateTimeFormat('en-GB').format(date)); // → "19/12/2012" // Korean uses year-month-day order console.log(new Intl.DateTimeFormat('ko-KR').format(date)); // → "2012. 12. 19." // Arabic in most Arabic speaking countries uses real Arabic digits console.log(new Intl.DateTimeFormat('ar-EG').format(date)); // → "١٩/١٢/٢٠١٢" // for Japanese, applications may want to use the Japanese calendar, // where 2012 was the year 24 of the Heisei era console.log(new Intl.DateTimeFormat('ja-JP-u-ca-japanese').format(date)); // → "24/12/19" // when requesting a language that may not be supported, such as // Balinese, include a fallback language, in this case Indonesian console.log(new Intl.DateTimeFormat(['ban', 'id']).format(date)); // → "19/12/2012"
Using options
The date and time formats can be customized using the options
argument:
var date = new Date(Date.UTC(2012, 11, 20, 3, 0, 0, 200)); // request a weekday along with a long date var options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' }; console.log(new Intl.DateTimeFormat('de-DE', options).format(date)); // → "Donnerstag, 20. Dezember 2012" // an application may want to use UTC and make that visible options.timeZone = 'UTC'; options.timeZoneName = 'short'; console.log(new Intl.DateTimeFormat('en-US', options).format(date)); // → "Thursday, December 20, 2012, GMT" // sometimes you want to be more precise options = { hour: 'numeric', minute: 'numeric', second: 'numeric', timeZone: 'Australia/Sydney', timeZoneName: 'short' }; console.log(new Intl.DateTimeFormat('en-AU', options).format(date)); // → "2:00:00 pm AEDT" // sometimes you want to be very precise options.fractionalSecondDigits = 3; //number digits for fraction-of-seconds console.log(new Intl.DateTimeFormat('en-AU', options).format(date)); // → "2:00:00.200 pm AEDT" // sometimes even the US needs 24-hour time options = { year: 'numeric', month: 'numeric', day: 'numeric', hour: 'numeric', minute: 'numeric', second: 'numeric', hour12: false, timeZone: 'America/Los_Angeles' }; console.log(new Intl.DateTimeFormat('en-US', options).format(date)); // → "12/19/2012, 19:00:00" // to specify options but use the browser's default locale, use 'default' console.log(new Intl.DateTimeFormat('default', options).format(date)); // → "12/19/2012, 19:00:00" // sometimes it's helpful to include the period of the day options = {hour: "numeric", dayPeriod: "short"}; console.log(new Intl.DateTimeFormat('en-US', options).format(date)); // → 10 at night
The used calendar and numbering formats can also be set independently via options
arguments:
var options = {calendar: 'chinese', numberingSystem: 'arab'}; var dateFormat = new Intl.DateTimeFormat('default', options); var usedOptions = dateFormat.resolvedOptions(); console.log(usedOptions.calendar); // → "chinese" console.log(usedOptions.numberingSystem); // → "arab" console.log(usedOptions.timeZone); // → "America/New_York" (the users default timezone)
Specifications
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
DateTimeFormat |
24
|
12
|
29
|
11
|
15
|
10
|
4.4
|
25
|
56
|
14
|
10
|
1.5
|
1.8
|
0.12.0
Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details.
|
DateTimeFormat |
24
|
12
|
29
|
11
|
15
|
10
|
4.4
|
25
|
56
|
14
|
10
|
1.5
|
1.8
|
13.0.0
0.12.0
Before version 13.0.0, only the locale data for
en-US is available by default. When other locales are specified, the
DateTimeFormat instance silently falls back to
en-US . To make full ICU (locale) data available before version 13, see
Node.js documentation on the --with-intl option and how to provide the data.
|
format |
24
|
12
|
29
|
11
|
15
|
10
|
4.4
|
25
|
56
|
14
|
10
|
1.5
|
1.8
|
0.12.0
Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details.
|
formatRange |
76
|
79
|
91
|
No
|
63
|
14.1
|
76
|
76
|
91
|
54
|
14.5
|
12.0
|
1.8
|
12.9.0
Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details.
|
formatRangeToParts |
76
|
79
|
91
|
No
|
63
|
14.1
|
76
|
76
|
91
|
54
|
14.5
|
12.0
|
1.8
|
12.9.0
Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details.
|
formatToParts |
57
Before version 71,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 71 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
18
|
51
|
No
|
44
Before version 58,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 58 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
11
|
57
Before version 71,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 71 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
57
Before version 71,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 71 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
56
|
43
Before version 50,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 50 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
11
|
7.0
Before version 71,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 71 and later use the specification defined
dayPeriod . See
Chromium bug 865351.
|
1.8
|
8.0.0
["Before version 12.0.0,
formatToParts() returned an object with an incorrectly cased type key of
dayperiod . Version 12.0.0 and later use the specification defined
dayPeriod . See
Chromium bug 865351.", "Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details."]
|
resolvedOptions |
24
|
12
|
29
|
11
|
15
|
10
|
4.4
|
25
|
56
|
14
|
10
|
1.5
|
1.8
|
0.12.0
Before version 13.0.0, only the locale data for
en-US is available by default. See
the DateTimeFormat() constructor for more details.
|
supportedLocalesOf |
24
|
12
|
29
|
11
|
15
|
10
|
4.4
|
25
|
56
|
14
|
10
|
1.5
|
1.8
|
13.0.0
0.12.0
Before version 13.0.0, only the locale data for
en-US is available by default. To make full ICU (locale) data available before version 13, see
Node.js documentation on the --with-intl option and how to provide the data.
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat