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---
title: Date.prototype.setUTCHours()
slug: Web/JavaScript/Reference/Global_Objects/Date/setUTCHours
translation_of: Web/JavaScript/Reference/Global_Objects/Date/setUTCHours
---
<div>{{JSRef}}</div>
<p>The <strong><code>setUTCHours()</code></strong> method sets the hour for a specified date according to universal time, and returns the number of milliseconds since 1 January 1970 00:00:00 UTC until the time represented by the updated {{jsxref("Date")}} instance.</p>
<div>{{EmbedInteractiveExample("pages/js/date-setutchours.html")}}</div>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox"><code><var>dateObj</var>.setUTCHours(<var>hoursValue</var>[, <var>minutesValue</var>[, <var>secondsValue</var>[, <var>msValue</var>]]])</code></pre>
<h3 id="参数"> 参数</h3>
<dl>
<dt><code>hoursValue</code></dt>
<dd>表示小时的整数，取值0到23之间。</dd>
<dt><code>minutesValue</code></dt>
<dd>可选参数。表示分钟的整数，取值0到59之间。</dd>
<dt><code>secondsValue</code></dt>
<dd>可选参数。表示秒数的整数，取值0到59之间。如果指定了该参数，就要同时指定<code>minutesValue这个参数。</code></dd>
<dt><code>msValue</code></dt>
<dd>可选参数。表示毫秒的整数，取值0到999之间。如果指定了该参数，就要指定<code>minutesValue和secondsValue这两个参数。</code></dd>
</dl>
<h3 id="返回值">返回值</h3>
<p>返回从1970-01-01 00:00:00 UTC 到更新后的日期所表示时间的毫秒数。</p>
<h2 id="描述">描述</h2>
<p>If you do not specify the <code>minutesValue</code>, <code>secondsValue</code>, and <code>msValue</code> parameters, the values returned from the {{jsxref("Date.prototype.getUTCMinutes()", "getUTCMinutes()")}}, {{jsxref("Date.prototype.getUTCSeconds()", "getUTCSeconds()")}}, and {{jsxref("Date.prototype.getUTCMilliseconds()", "getUTCMilliseconds()")}} methods are used.</p>
<p>If a parameter you specify is outside of the expected range, <code>setUTCHours()</code> attempts to update the date information in the {{jsxref("Date")}} object accordingly. For example, if you use 100 for <code>secondsValue</code>, the minutes will be incremented by 1 (<code>minutesValue + 1</code>), and 40 will be used for seconds.</p>
<h2 id="例子">例子</h2>
<h3 id="使用_setUTCHours()">使用 <code>setUTCHours()</code></h3>
<pre class="brush: js">var theBigDay = new Date();
theBigDay.setUTCHours(8);
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ES1')}}</td>
<td>{{Spec2('ES1')}}</td>
<td>Initial definition. Implemented in JavaScript 1.3.</td>
</tr>
<tr>
<td>{{SpecName('ES5.1', '#sec-15.9.5.35', 'Date.prototype.setUTCHours')}}</td>
<td>{{Spec2('ES5.1')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('ES6', '#sec-date.prototype.setutchours', 'Date.prototype.setUTCHours')}}</td>
<td>{{Spec2('ES6')}}</td>
<td> </td>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-date.prototype.setutchours', 'Date.prototype.setUTCHours')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div>
<p>{{Compat("javascript.builtins.Date.setUTCHours")}}</p>
</div>
<h2 id="相关链接">相关链接</h2>
<ul>
<li>{{jsxref("Date.prototype.getUTCHours()")}}</li>
<li>{{jsxref("Date.prototype.setHours()")}}</li>
</ul>
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