JavaScript Date now() Method

Definition and Usage

Date.now() The method returns the number of milliseconds since 00:00:00 UTC on January 1, 1970.

Example

Example 1

Return the milliseconds since 1970/01/01：

var n = Date.now();

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Example 3

Calculate the number of years since 1970/01/01：

var minutes = 1000 * 60;
var hours = minutes * 60;
var days = hours * 24;
var years = days * 365;
var t = Date.now();
var y = Math.round(t / years);

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Syntax

Date.now()

Parameters

No parameters.

Technical Details

Return Value： Number, representing the milliseconds since midnight on January 1, 1970.
JavaScript Version： ECMAScript 5 (2009)

Browser Supports

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Date.now() 支持 9 支持 支持 支持

相关页面

教程：JavaScript 日期

教程：JavaScript 日期格式