Date

JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects contain a Number that represents milliseconds since 1 January 1970 UTC.

Description

The ECMAScript epoch and timestamps

A JavaScript date is fundamentally specified as the number of milliseconds that have elapsed since midnight on January 1, 1970, UTC. This date and time is the same as the UNIX epoch, which is the predominant base value for computer-recorded date and time values.

Note: It's important to keep in mind that while the time value at the heart of a Date object is UTC, the basic methods to fetch the date and time or its components all work in the local (i.e. host system) time zone and offset.

It should be noted that the maximum Date is not of the same value as the maximum safe integer (Number.MAX_SAFE_INTEGER is 9,007,199,254,740,991). Instead, it is defined in ECMA-262 that a maximum of ±100,000,000 (one hundred million) days relative to January 1, 1970 UTC (that is, April 20, 271821 BCE ~ September 13, 275760 CE) can be represented by the standard Date object.

Date format and time zone conversions

There are a number of methods available to obtain a date in various formats, as well as to perform time zone conversions. Particularly useful are the functions that output the date and time in Coordinated Universal Time (UTC), the global standard time defined by the World Time Standard. (This time is historically known as Greenwich Mean Time, as UTC lies along the meridian that includes London—and nearby Greenwich—in the United Kingdom.) The user's device provides the local time.

In addition to methods to read and alter individual components of the local date and time (such as getDay() and setHours()), there are also versions of the same methods that read and manipulate the date and time using UTC (such as getUTCDay() and setUTCHours()).

Constructor

Date()
Creates a new Date object.

Static methods

Date.now()
Returns the numeric value corresponding to the current time—the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC, with leap seconds ignored.
Date.parse()
Parses a string representation of a date and returns the number of milliseconds since 1 January, 1970, 00:00:00 UTC, with leap seconds ignored.

Note: Parsing of strings with Date.parse is strongly discouraged due to browser differences and inconsistencies.

Date.UTC()
Accepts the same parameters as the longest form of the constructor (i.e. 2 to 7) and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC, with leap seconds ignored.

Instance methods

Date.prototype.getDate()
Returns the day of the month (131) for the specified date according to local time.
Date.prototype.getDay()
Returns the day of the week (06) for the specified date according to local time.
Date.prototype.getFullYear()
Returns the year (4 digits for 4-digit years) of the specified date according to local time.
Date.prototype.getHours()
Returns the hour (023) in the specified date according to local time.
Date.prototype.getMilliseconds()
Returns the milliseconds (0999) in the specified date according to local time.
Date.prototype.getMinutes()
Returns the minutes (059) in the specified date according to local time.
Date.prototype.getMonth()
Returns the month (011) in the specified date according to local time.
Date.prototype.getSeconds()
Returns the seconds (059) in the specified date according to local time.
Date.prototype.getTime()
Returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC. (Negative values are returned for prior times.)
Date.prototype.getTimezoneOffset()
Returns the time-zone offset in minutes for the current locale.
Date.prototype.getUTCDate()
Returns the day (date) of the month (131) in the specified date according to universal time.
Date.prototype.getUTCDay()
Returns the day of the week (06) in the specified date according to universal time.
Date.prototype.getUTCFullYear()
Returns the year (4 digits for 4-digit years) in the specified date according to universal time.
Date.prototype.getUTCHours()
Returns the hours (023) in the specified date according to universal time.
Date.prototype.getUTCMilliseconds()
Returns the milliseconds (0999) in the specified date according to universal time.
Date.prototype.getUTCMinutes()
Returns the minutes (059) in the specified date according to universal time.
Date.prototype.getUTCMonth()
Returns the month (011) in the specified date according to universal time.
Date.prototype.getUTCSeconds()
Returns the seconds (059) in the specified date according to universal time.
Date.prototype.getYear()
Returns the year (usually 2–3 digits) in the specified date according to local time. Use getFullYear() instead.
Date.prototype.setDate()
Sets the day of the month for a specified date according to local time.
Date.prototype.setFullYear()
Sets the full year (e.g. 4 digits for 4-digit years) for a specified date according to local time.
Date.prototype.setHours()
Sets the hours for a specified date according to local time.
Date.prototype.setMilliseconds()
Sets the milliseconds for a specified date according to local time.
Date.prototype.setMinutes()
Sets the minutes for a specified date according to local time.
Date.prototype.setMonth()
Sets the month for a specified date according to local time.
Date.prototype.setSeconds()
Sets the seconds for a specified date according to local time.
Date.prototype.setTime()
Sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC. Use negative numbers for times prior.
Date.prototype.setUTCDate()
Sets the day of the month for a specified date according to universal time.
Date.prototype.setUTCFullYear()
Sets the full year (e.g. 4 digits for 4-digit years) for a specified date according to universal time.
Date.prototype.setUTCHours()
Sets the hour for a specified date according to universal time.
Date.prototype.setUTCMilliseconds()
Sets the milliseconds for a specified date according to universal time.
Date.prototype.setUTCMinutes()
Sets the minutes for a specified date according to universal time.
Date.prototype.setUTCMonth()
Sets the month for a specified date according to universal time.
Date.prototype.setUTCSeconds()
Sets the seconds for a specified date according to universal time.
Date.prototype.setYear()
Sets the year (usually 2–3 digits) for a specified date according to local time. Use setFullYear() instead.
Date.prototype.toDateString()
Returns the "date" portion of the Date as a human-readable string like 'Thu Apr 12 2018'.
Date.prototype.toISOString()
Converts a date to a string following the ISO 8601 Extended Format.
Date.prototype.toJSON()
Returns a string representing the Date using toISOString(). Intended for use by JSON.stringify().
Date.prototype.toGMTString()
Returns a string representing the Date based on the GMT (UTC) time zone. Use toUTCString() instead.
Date.prototype.toLocaleDateString()
Returns a string with a locality sensitive representation of the date portion of this date based on system settings.
Date.prototype.toLocaleFormat()
Converts a date to a string, using a format string.
Date.prototype.toLocaleString()
Returns a string with a locality-sensitive representation of this date. Overrides the Object.prototype.toLocaleString() method.
Date.prototype.toLocaleTimeString()
Returns a string with a locality-sensitive representation of the time portion of this date, based on system settings.
Date.prototype.toString()
Returns a string representing the specified Date object. Overrides the Object.prototype.toString() method.
Date.prototype.toTimeString()
Returns the "time" portion of the Date as a human-readable string.
Date.prototype.toUTCString()
Converts a date to a string using the UTC timezone.
Date.prototype.valueOf()
Returns the primitive value of a Date object. Overrides the Object.prototype.valueOf() method.

Examples

Several ways to create a Date object

The following examples show several ways to create JavaScript dates:

Note: Parsing of date strings with the Date constructor (and Date.parse, they are equivalent) is strongly discouraged due to browser differences and inconsistencies.

let today = new Date()
let birthday = new Date('December 17, 1995 03:24:00')
let birthday = new Date('1995-12-17T03:24:00')
let birthday = new Date(1995, 11, 17)            // the month is 0-indexed
let birthday = new Date(1995, 11, 17, 3, 24, 0)

Two digit years map to 1900 – 1999

In order to create and get dates between the years 0 and 99 the Date.prototype.setFullYear() and Date.prototype.getFullYear() methods should be used.

let date = new Date(98, 1)  // Sun Feb 01 1998 00:00:00 GMT+0000 (GMT)

// Deprecated method; 98 maps to 1998 here as well
date.setYear(98)            // Sun Feb 01 1998 00:00:00 GMT+0000 (GMT)

date.setFullYear(98)        // Sat Feb 01 0098 00:00:00 GMT+0000 (BST)

Calculating elapsed time

The following examples show how to determine the elapsed time between two JavaScript dates in milliseconds.

Due to the differing lengths of days (due to daylight saving changeover), months, and years, expressing elapsed time in units greater than hours, minutes, and seconds requires addressing a number of issues, and should be thoroughly researched before being attempted.

// Using Date objects
let start = Date.now()

// The event to time goes here:
doSomethingForALongTime()
let end = Date.now()
let elapsed = end - start // elapsed time in milliseconds
// Using built-in methods
let start = new Date()

// The event to time goes here:
doSomethingForALongTime()
let end = new Date()
let elapsed = end.getTime() - start.getTime() // elapsed time in milliseconds
// To test a function and get back its return
function printElapsedTime(fTest) {
  let nStartTime = Date.now(),
      vReturn = fTest(),
      nEndTime = Date.now()

  console.log(`Elapsed time: ${ String(nEndTime - nStartTime) } milliseconds`)
  return vReturn
}

let yourFunctionReturn = printElapsedTime(yourFunction)

Note: In browsers that support the Web Performance API's high-resolution time feature, Performance.now() can provide more reliable and precise measurements of elapsed time than Date.now().

Get the number of seconds since the ECMAScript Epoch

let seconds = Math.floor(Date.now() / 1000)

In this case, it's important to return only an integer—so a simple division won't do. It's also important to only return actually elapsed seconds. (That's why this code uses Math.floor(), and not Math.round().)

Specifications

Specification
ECMAScript (ECMA-262)
The definition of 'Date' in that specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
DateChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3
Notes
Full support 3
Notes
Notes The ISO8601 Date Format is not supported in Internet Explorer 8 or earlier.
Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
Date() constructorChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
UTCChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getDateChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getDayChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getFullYearChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getHoursChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getMillisecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getMinutesChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getMonthChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getSecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getTimeChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getTimezoneOffsetChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCDateChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCDayChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCFullYearChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCHoursChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCMillisecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCMinutesChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCMonthChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getUTCSecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
getYear
Deprecated
Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
nowChrome Full support 5Edge Full support 12Firefox Full support 3IE Full support 9Opera Full support 10.5Safari Full support 4WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 14Safari iOS Full support 4Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
parseChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
parse: ISO 8601 formatChrome Full support 6Edge Full support 12Firefox Full support 4IE Full support 9Opera Full support 6Safari Full support 5.1WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 5.1Samsung Internet Android Full support 1.0nodejs Full support 0.12
setDateChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setFullYearChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setHoursChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setMillisecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setMinutesChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setMonthChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setSecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setTimeChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCDateChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCFullYearChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCHoursChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCMillisecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCMinutesChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCMonthChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setUTCSecondsChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
setYear
Deprecated
Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toDateStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5.5Opera Full support 5Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toGMTString
Deprecated
Chrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toISOStringChrome Full support 3Edge Full support 12Firefox Full support 1IE Full support 9Opera Full support 10.5Safari Full support 5WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 11Safari iOS Full support 4.2Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toJSONChrome Full support 3Edge Full support 12Firefox Full support 1IE Full support 8Opera Full support 10.5Safari Full support 5WebView Android Full support ≤37Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 11Safari iOS Full support 4.2Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toLocaleDateStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5.5Opera Full support 5Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toLocaleDateString: IANA time zone names in timeZone optionChrome Full support 24Edge Full support 14Firefox Full support 52IE No support NoOpera Full support 15Safari Full support 6.1WebView Android Full support 37Chrome Android Full support 25Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 7Samsung Internet Android Full support 1.5nodejs Full support 0.12
toLocaleDateString.localesChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android No support NoSafari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 13.0.0
Full support 13.0.0
Partial support 0.12
Notes
Notes Prior to Node.js 13.0.0, only the locale data for en-us is available by default. When other English locales are specified, the function silently falls back to en-us. When other languages are specified, it throws a RangeError. In order to make full ICU (locale) data available for versions prior to 13, see docs on the --with-full-icu= flag and how to provide the data.
toLocaleDateString.optionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android No support NoSafari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 0.12
toLocaleStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toLocaleString: IANA time zone names in timeZone optionChrome Full support 24Edge Full support 14Firefox Full support 52IE No support NoOpera Full support 15Safari Full support 6.1WebView Android Full support 37Chrome Android Full support 25Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 7Samsung Internet Android Full support 1.5nodejs Full support 0.12
toLocaleString.localesChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 13.0.0
Full support 13.0.0
Partial support 0.12
Notes
Notes Prior to Node.js 13.0.0, only the locale data for en-us is available by default. When other English locales are specified, the function silently falls back to en-us. When other languages are specified, it throws a RangeError. In order to make full ICU (locale) data available for versions prior to 13, see docs on the --with-full-icu= flag and how to provide the data.
toLocaleString.optionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android Full support 14Safari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 0.12
toLocaleTimeStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5.5Opera Full support 5Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toLocaleTimeString: IANA time zone names in timeZone optionChrome Full support 24Edge Full support 14Firefox Full support 52IE No support NoOpera Full support 15Safari Full support 6.1WebView Android Full support 37Chrome Android Full support 25Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 7Samsung Internet Android Full support 1.5nodejs Full support 0.12
toLocaleTimeString.localesChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android No support NoSafari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 13.0.0
Full support 13.0.0
Partial support 0.12
Notes
Notes Prior to Node.js 13.0.0, only the locale data for en-us is available by default. When other English locales are specified, the function silently falls back to en-us. When other languages are specified, it throws a RangeError. In order to make full ICU (locale) data available for versions prior to 13, see docs on the --with-full-icu= flag and how to provide the data.
toLocaleTimeString.optionsChrome Full support 24Edge Full support 12Firefox Full support 29IE Full support 11Opera Full support 15Safari Full support 10WebView Android No support NoChrome Android Full support 26Firefox Android Full support 56Opera Android No support NoSafari iOS Full support 10Samsung Internet Android Full support 1.5nodejs Full support 0.12
toSource
Non-standard
Chrome No support NoEdge No support NoFirefox No support 1 — 74
Notes
No support 1 — 74
Notes
Notes Starting in Firefox 74, toSource() is no longer available for use by web content. It is still allowed for internal and privileged code.
IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 4Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support Nonodejs No support No
toStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toTimeStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 5.5Opera Full support 5Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
toUTCStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
valueOfChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100
@@toPrimitiveChrome Full support 47Edge Full support 15Firefox Full support 44IE No support NoOpera Full support 34Safari Full support 10WebView Android Full support 47Chrome Android Full support 47Firefox Android Full support 44Opera Android Full support 34Safari iOS Full support 10Samsung Internet Android Full support 5.0nodejs Full support 6.0.0

Legend

Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.
See implementation notes.
See implementation notes.

See also