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+---
+title: Date.prototype.getUTCDay()
+slug: Web/JavaScript/Reference/Global_Objects/Date/getUTCDay
+translation_of: Web/JavaScript/Reference/Global_Objects/Date/getUTCDay
+---
+<div>{{JSRef("Global_Objects", "Date")}}</div>
+
+<p><strong><code>getUTCDay()</code></strong> 方法以世界时为标准，返回一个指定的日期对象为一星期中的第几天，其中 0 代表星期天。</p>
+
+<div>{{EmbedInteractiveExample("pages/js/date-getutcday.html")}}</div>
+
+
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><code><var>dateObj</var>.getUTCDay()</code></pre>
+
+<h3 id="Parameters" name="Parameters">参数</h3>
+
+<p>无。</p>
+
+<h3 id="Returns" name="Returns">返回值</h3>
+
+<p><code>getUTCDay()</code> 方法返回一个对应一星期中第几天的整数：0 代表星期天，1 代表星期一，2 代表星期二，依次类推。</p>
+
+<h2 id="Examples" name="Examples">例子</h2>
+
+<h3 id="Example:_Using_getUTCDay" name="Example:_Using_getUTCDay">例子: 使用 <code>getUTCDay()</code> 方法</h3>
+
+<p>下面的例子是把当前日期的星期部分赋值给变量 <code>weekday</code>。</p>
+
+<pre class="brush: js">var today = new Date();
+var weekday = today.getUTCDay();
+</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.</td>
+   <td>Standard</td>
+   <td>Initial definition. Implemented in JavaScript 1.3.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES5.1', '#sec-15.9.5.17', 'Date.prototype.getUTCDay')}}</td>
+   <td>{{Spec2('ES5.1')}}</td>
+   <td> </td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES6', '#sec-date.prototype.getutcday', 'Date.prototype.getUTCDay')}}</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>
+
+<div>
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("javascript.builtins.Date.getUTCDay")}}</p>
+</div>
+
+<h2 id="See_also" name="See_also">相关链接</h2>
+
+<ul>
+ <li>{{jsxref("Date.prototype.getUTCDate()")}}</li>
+ <li>{{jsxref("Date.prototype.getDay()")}}</li>
+ <li>{{jsxref("Date.prototype.setUTCDate()")}}</li>
+</ul>