Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

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 Object Properties JS Object Methods JS Object Display JS Object Constructors JS Events JS Strings JS String Methods JS String Search JS String Templates JS Numbers JS BigInt JS Number Methods JS Number Properties JS Arrays JS Array Methods JS Array Search 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 If Else JS Switch JS Loop For JS Loop For In JS Loop For Of JS Loop While JS Break JS Iterables JS Sets JS Set Methods JS Maps JS Map Methods JS Typeof JS Type Conversion JS Destructuring JS Bitwise JS RegExp JS Precedence JS Errors JS Scope JS Hoisting JS Strict Mode JS this Keyword JS Arrow Function JS Classes JS Modules 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 2019 JS 2020 JS 2021 JS 2022 JS 2023 JS 2024 JS IE / Edge JS History

JS Objects

Object Definitions Object Prototypes Object Methods Object Properties Object Get / Set Object Protection

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 Website JS Interview Prep JS Bootcamp JS Certificate

JS References

JavaScript Objects HTML DOM Objects


JavaScript Date Objects


JavaScript Date Objects let us work with dates:

Examples

const d = new Date();
Try it Yourself »
const d = new Date("2022-03-25");
Try it Yourself »

Note

Date objects are static. The "clock" is not "running".

The computer clock is ticking, date objects are not.


JavaScript Date Output

By default, JavaScript will use the browser's time zone and display a date as a full text string:

You will learn much more about how to display dates, later in this tutorial.


Creating Date Objects

Date objects are created with the new Date() constructor.

There are 9 ways to create a new date object:

new Date()
new Date(date string)

new Date(year,month)
new Date(year,month,day)
new Date(year,month,day,hours)
new Date(year,month,day,hours,minutes)
new Date(year,month,day,hours,minutes,seconds)
new Date(year,month,day,hours,minutes,seconds,ms)

new Date(milliseconds)

JavaScript new Date()

new Date() creates a date object with the current date and time:

Example

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

new Date(date string)

new Date(date string) creates a date object from a date string:

Examples

const d = new Date("October 13, 2014 11:13:00");
Try it Yourself »
const d = new Date("2022-03-25");
Try it Yourself »

Date string formats are described in the next chapter.


new Date(year, month, ...)

new Date(year, month, ...) creates a date object with a specified date and time.

7 numbers specify year, month, day, hour, minute, second, and millisecond (in that order):

Example

const d = new Date(2018, 11, 24, 10, 33, 30, 0);
Try it Yourself »

Note

JavaScript counts months from 0 to 11:

January = 0.

December = 11.

Specifying a month higher than 11, will not result in an error but add the overflow to the next year:

Specifying:

const d = new Date(2018, 15, 24, 10, 33, 30);
Try it Yourself »

Is the same as:

const d = new Date(2019, 3, 24, 10, 33, 30);
Try it Yourself »

Specifying a day higher than max, will not result in an error but add the overflow to the next month:

Specifying:

const d = new Date(2018, 5, 35, 10, 33, 30);

Is the same as:

const d = new Date(2018, 6, 5, 10, 33, 30);
Try it Yourself »

Using 6, 4, 3, or 2 Numbers

6 numbers specify year, month, day, hour, minute, second:

Example

const d = new Date(2018, 11, 24, 10, 33, 30);
Try it Yourself »

5 numbers specify year, month, day, hour, and minute:

Example

const d = new Date(2018, 11, 24, 10, 33);
Try it Yourself »

4 numbers specify year, month, day, and hour:

Example

const d = new Date(2018, 11, 24, 10);
Try it Yourself »

3 numbers specify year, month, and day:

Example

const d = new Date(2018, 11, 24);
Try it Yourself »

2 numbers specify year and month:

Example

const d = new Date(2018, 11);
Try it Yourself »

You cannot omit month. If you supply only one parameter it will be treated as milliseconds.

Example

const d = new Date(2018);
Try it Yourself »

Previous Century

One and two digit years will be interpreted as 19xx:

Example

const d = new Date(99, 11, 24);
Try it Yourself »

Example

const d = new Date(9, 11, 24);
Try it Yourself »

JavaScript Stores Dates as Milliseconds

JavaScript stores dates as number of milliseconds since January 01, 1970.

Zero time is January 01, 1970 00:00:00 UTC.

One day (24 hours) is 86 400 000 milliseconds.

Now the time is: milliseconds past January 01, 1970


new Date(milliseconds)

new Date(milliseconds) creates a new date object as milliseconds plus zero time:

Examples

01 January 1970 plus 100 000 000 000 milliseconds is:

const d = new Date(100000000000);
Try it Yourself »

January 01 1970 minus 100 000 000 000 milliseconds is:

const d = new Date(-100000000000);
Try it Yourself »

January 01 1970 plus 24 hours is:

const d = new Date(24 * 60 * 60 * 1000);
// or
const d = new Date(86400000);
Try it Yourself »

01 January 1970 plus 0 milliseconds is:

const d = new Date(0);
Try it Yourself »


Date Methods

When a date object is created, a number of methods allow you to operate on it.

Date methods allow you to get and set the year, month, day, hour, minute, second, and millisecond of date objects, using either local time or UTC (universal, or GMT) time.

Date methods and time zones are covered in the next chapters.


Displaying Dates

JavaScript will (by default) output dates using the toString() method. This is a string representation of the date, including the time zone. The format is specified in the ECMAScript specification:

Example

Try it Yourself »

When you display a date object in HTML, it is automatically converted to a string, with the toString() method.

Example

const d = new Date();
d.toString();
Try it Yourself »

The toDateString() method converts a date to a more readable format:

Example

const d = new Date();
d.toDateString();
Try it Yourself »

The toUTCString() method converts a date to a string using the UTC standard:

Example

const d = new Date();
d.toUTCString();
Try it Yourself »

The toISOString() method converts a date to a string using the ISO standard:

Example

const d = new Date();
d.toISOString();
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.

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.