The method returns the number of milliseconds elapsed since 1 January 1970 00:00:00 UTC.


var timeInMs =;

Return value

A Number representing the milliseconds elapsed since the UNIX epoch.


Because now() is a static method of Date, you always use it as


This method was standardized in ECMA-262 5th edition. Engines which have not been updated to support this method can work around the absence of this method using the following shim:

if (! { = function now() {
    return new Date().getTime();


Specification Status Comment
ECMAScript 5.1 (ECMA-262)
The definition of '' in that specification.
Standard Initial definition. Implemented in JavaScript 1.5.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of '' in that specification.
ECMAScript 2017 Draft (ECMA-262)
The definition of '' in that specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 5 3.0 (1.9) 9 10.50 4
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also


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