JavaScript Date.now()
Examples
let ms = Date.now();
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Calculate the number of years since 1970/01/01:
const minute = 1000 * 60;
const hour = minute * 60;
const day = hour * 24;
const year = day * 365;
let years = Math.round(Date.now() / year);
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Definition and Usage
Date.now() returns the number of milliseconds since January 1, 1970.
Notes
Date.now() is a static method of the Date object.
You cannot use it on a date like myDate.now()
The syntax is always Date.now().
Syntax
Date.now()
Parameters
| NONE |
Return Value
| A number. The number of milliseconds since midnight January 1, 1970 00:00:00 UTC. |
Related Pages:
Browser Support
Date.now() is an ECMAScript5 (ES5) feature.
ES5 (JavaScript 2009) fully supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | 9-11 |
