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---
title: Date.prototype.setTime()
slug: Web/JavaScript/Reference/Global_Objects/Date/setTime
translation_of: Web/JavaScript/Reference/Global_Objects/Date/setTime
---
<div>{{JSRef("Global_Objects", "Date")}}</div>
<p><code><strong>setTime()</strong></code> 方法以一个表示从1970-1-1 00:00:00 UTC计时的毫秒数为来为 <code>Date</code> 对象设置时间。</p>
<div>{{EmbedInteractiveExample("pages/js/date-settime.html")}}</div>
<h2 id="Syntax">语法</h2>
<pre class="syntaxbox"><var>dateObj</var>.setTime(<em>timeValue</em>)</pre>
<h3 id="Parameters">参数</h3>
<dl>
<dt><code>timeValue</code></dt>
<dd>一个整数，表示从1970-1-1 00:00:00 UTC开始计时的毫秒数。</dd>
</dl>
<h3 id="Parameters">返回值</h3>
<p>UTC 1970年1月1日00:00:00与更新日期之间的毫秒数（实际上是自变量的值）。</p>
<h2 id="Description">描述</h2>
<p>使用 <code>setTime</code> 方法用来把一个日期时间赋值给另一个 <code>Date </code>对象。</p>
<h2 id="Examples">例子</h2>
<h3 id="Example_Using_setTime">例子：使用<code>setTime</code></h3>
<pre>theBigDay = new Date("July 1, 1999");
sameAsBigDay = new Date();
sameAsBigDay.setTime(theBigDay.getTime());
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">规范版本</th>
<th scope="col">规范状态</th>
<th scope="col">注解</th>
</tr>
<tr>
<td>ECMAScript 1st Edition. Implemented in JavaScript 1.0</td>
<td>Standard</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('ES5.1', '#sec-15.9.5.27', 'Date.prototype.setTime')}}</td>
<td>{{Spec2('ES5.1')}}</td>
<td></td>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-date.prototype.settime', 'Date.prototype.setTime')}}</td>
<td>{{Spec2('ES6')}}</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{Compat("javascript.builtins.Date.setTime")}}</p>
<h2 id="See_Also">相关链接</h2>
<ul>
<li>{{jsxref("Date.prototype.getTime()")}}</li>
<li>{{jsxref("Date.prototype.setUTCHours()")}}</li>
</ul>
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