`getDay()` 方法根据本地时间，返回一个具体日期中一周的第几天，0 表示星期天。

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## 语法

    dateObj.getDay()

### 参数

无

### 返回值

`getDay()` 返回一个整数值： 0 代表星期日， 1 代表星期一，2 代表星期二， 依次类推。

## 例子

### 例子：使用`getDay`方法

下面第二条语句，基于日期对象 `Xmas95` 的值，把 1 赋值给 `weekday`。也就是说1995年12月25日是星期一。

    var Xmas95 = new Date("December 25, 1995 23:15:00");
    var weekday = Xmas95.getDay();

    alert(weekday); // 1

## 规范

规范版本 | 规范状态 | 注解
--- | --- | ---
ECMAScript 1st Edition. Implemented in JavaScript 1.0 | Standard | Initial definition.
ECMAScript 5.1 (ECMA-262) Date.prototype.getDay | Standard |
ECMAScript 2015 (6th Edition, ECMA-262) Date.prototype.getDay | Standard |

## 浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

| Desktop | Mobile | Server
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | Node.js
`getDay` | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 1 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes | nodejs Full support Yes

### Legend

Full support
  Full support

## 相关链接

- `Date.prototype.getUTCDate()`
- `Date.prototype.getUTCDay()`
- `Date.prototype.setDate()`