BEST SITE FOR WEB DEVELOPERS

JS Tutorial

JS HOME JS Introduction JS Where To JS Output JS Statements JS Syntax JS Comments JS Variables JS Let JS Const JS Operators JS Arithmetic JS Assignment JS Data Types JS Functions JS Objects JS Events JS Strings JS String Methods JS String Search JS String Templates JS Numbers JS Number Methods JS Arrays JS Array Methods JS Array Sort JS Array Iteration JS Array Const JS Dates JS Date Formats JS Date Get Methods JS Date Set Methods JS Math JS Random JS Booleans JS Comparisons JS Conditions JS Switch JS Loop For JS Loop For In JS Loop For Of JS Loop While JS Break JS Iterables JS Sets JS Maps JS Typeof JS Type Conversion JS Bitwise JS RegExp JS Errors JS Scope JS Hoisting JS Strict Mode JS this Keyword JS Arrow Function JS Classes JS JSON JS Debugging JS Style Guide JS Best Practices JS Mistakes JS Performance JS Reserved Words

JS Versions

JS Versions JS 2009 (ES5) JS 2015 (ES6) JS 2016 JS 2017 JS 2018 JS IE / Edge JS History

JS Objects

Object Definitions Object Properties Object Methods Object Display Object Accessors Object Constructors Object Prototypes Object Iterables Object Sets Object Maps Object Reference

JS Functions

Function Definitions Function Parameters Function Invocation Function Call Function Apply Function Bind Function Closures

JS Classes

Class Intro Class Inheritance Class Static

JS Async

JS Callbacks JS Asynchronous JS Promises JS Async/Await

JS HTML DOM

DOM Intro DOM Methods DOM Document DOM Elements DOM HTML DOM Forms DOM CSS DOM Animations DOM Events DOM Event Listener DOM Navigation DOM Nodes DOM Collections DOM Node Lists

JS Browser BOM

JS Window JS Screen JS Location JS History JS Navigator JS Popup Alert JS Timing JS Cookies

JS Web APIs

Web API Intro Web Forms API Web History API Web Storage API Web Worker API Web Fetch API Web Geolocation API

JS AJAX

AJAX Intro AJAX XMLHttp AJAX Request AJAX Response AJAX XML File AJAX PHP AJAX ASP AJAX Database AJAX Applications AJAX Examples

JS JSON

JSON Intro JSON Syntax JSON vs XML JSON Data Types JSON Parse JSON Stringify JSON Objects JSON Arrays JSON Server JSON PHP JSON HTML JSON JSONP

JS vs jQuery

jQuery Selectors jQuery HTML jQuery CSS jQuery DOM

JS Graphics

JS Graphics JS Canvas JS Plotly JS Chart.js JS Google Chart JS D3.js

JS Examples

JS Examples JS HTML DOM JS HTML Input JS HTML Objects JS HTML Events JS Browser JS Editor JS Exercises JS Quiz JS Certificate

JS References

JavaScript Objects HTML DOM Objects

JavaScript. W3Schools in English. Lessons for beginners

Ua

JavaScript Date Formats


JavaScript Date Input

There are generally 3 types of JavaScript date input formats:

Type Example
ISO Date "2015-03-25" (The International Standard)
Short Date "03/25/2015"
Long Date "Mar 25 2015" or "25 Mar 2015"

The ISO format follows a strict standard in JavaScript.

The other formats are not so well defined and might be browser specific.


JavaScript Date Output

Independent of input format, JavaScript will (by default) output dates in full text string format:


JavaScript ISO Dates

ISO 8601 is the international standard for the representation of dates and times.

The ISO 8601 syntax (YYYY-MM-DD) is also the preferred JavaScript date format:

Example (Complete date)

const d = new Date("2015-03-25");
Try it Yourself »

The computed date will be relative to your time zone.
Depending on your time zone, the result above will vary between March 24 and March 25.


ISO Dates (Year and Month)

ISO dates can be written without specifying the day (YYYY-MM):

Example

const d = new Date("2015-03");
Try it Yourself »

Time zones will vary the result above between February 28 and March 01.


ISO Dates (Only Year)

ISO dates can be written without month and day (YYYY):

Example

const d = new Date("2015");
Try it Yourself »

Time zones will vary the result above between December 31 2014 and January 01 2015.


ISO Dates (Date-Time)

ISO dates can be written with added hours, minutes, and seconds (YYYY-MM-DDTHH:MM:SSZ):

Example

const d = new Date("2015-03-25T12:00:00Z");
Try it Yourself »

Date and time is separated with a capital T.

UTC time is defined with a capital letter Z.

If you want to modify the time relative to UTC, remove the Z and add +HH:MM or -HH:MM instead:

Example

const d = new Date("2015-03-25T12:00:00-06:30");
Try it Yourself »

UTC (Universal Time Coordinated) is the same as GMT (Greenwich Mean Time).

Omitting T or Z in a date-time string can give different results in different browsers.


Time Zones

When setting a date, without specifying the time zone, JavaScript will use the browser's time zone.

When getting a date, without specifying the time zone, the result is converted to the browser's time zone.

In other words: If a date/time is created in GMT (Greenwich Mean Time), the date/time will be converted to CDT (Central US Daylight Time) if a user browses from central US.


JavaScript Short Dates.

Short dates are written with an "MM/DD/YYYY" syntax like this:

Example

const d = new Date("03/25/2015");
Try it Yourself »

WARNINGS !

In some browsers, months or days with no leading zeroes may produce an error:

const d = new Date("2015-3-25");

The behavior of "YYYY/MM/DD" is undefined.
Some browsers will try to guess the format. Some will return NaN.

const d = new Date("2015/03/25");

The behavior of  "DD-MM-YYYY" is also undefined.
Some browsers will try to guess the format. Some will return NaN.

const d = new Date("25-03-2015");

JavaScript Long Dates.

Long dates are most often written with a "MMM DD YYYY" syntax like this:

Example

const d = new Date("Mar 25 2015");
Try it Yourself »

Month and day can be in any order:

Example

const d = new Date("25 Mar 2015");
Try it Yourself »

And, month can be written in full (January), or abbreviated (Jan):

Example

const d = new Date("January 25 2015");
Try it Yourself »

Example

const d = new Date("Jan 25 2015");
Try it Yourself »

Commas are ignored. Names are case insensitive:

Example

const d = new Date("JANUARY, 25, 2015");
Try it Yourself »

Date Input - Parsing Dates

If you have a valid date string, you can use the Date.parse() method to convert it to milliseconds.

Date.parse() returns the number of milliseconds between the date and January 1, 1970:

Example

let msec = Date.parse("March 21, 2012");
Try it Yourself »

You can then use the number of milliseconds to convert it to a date object:

Example

let msec = Date.parse("March 21, 2012");
const d = new Date(msec);
Try it Yourself »

Complete JavaScript Date Reference

For a complete Date reference, go to our:

Complete JavaScript Date Reference.

The reference contains descriptions and examples of all Date properties and methods.