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The getTime() method returns the numeric value corresponding to the time for the specified date according to universal time.

You can use this method to help assign a date and time to another Date object. This method is functionally equivalent to the valueOf() method.

Syntax

dateObj.getTime()

Return value

A number representing the milliseconds elapsed between 1 January 1970 00:00:00 UTC and the given date.

Examples

Using getTime() for copying dates

Constructing a date object with the identical time value.

// Since month is zero based, birthday will be January 10, 1995
var birthday = new Date(1994, 12, 10);
var copy = new Date();
copy.setTime(birthday.getTime());

 

Measuring execution time

Subtracting two subsequent getTime() calls on newly generated Date objects, give the time span between these two calls. This can be used to calculate the executing time of some operations. See also Date.now() to prevent instantiating unnecessary Date objects.

var end, start;

start = new Date();
for (var i = 0; i < 1000; i++) {
  Math.sqrt(i);
}
end = new Date();

console.log('Operation took ' + (end.getTime() - start.getTime()) + ' msec');

Specifications

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262)
The definition of 'Date.prototype.getTime' in that specification.
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Date.prototype.getTime' in that specification.
Standard  
ECMAScript 2017 Draft (ECMA-262)
The definition of 'Date.prototype.getTime' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

Document Tags and Contributors

 Last updated by: PhilTheAir,