Date.prototype.toUTCString()

¥Syntax

toUTCString()

¥Parameters

没有任何。

¥None.

¥Return value

使用 UTC 时区表示给定日期的字符串（请参阅格式说明）。如果日期是 invalid，则返回 "Invalid Date"。

¥A string representing the given date using the UTC time zone (see description for the format). Returns "Invalid Date" if the date is invalid.

¥Description

toUTCString() 返回的值是 Www, dd Mmm yyyy hh:mm:ss GMT 形式的字符串，其中：

¥The value returned by toUTCString() is a string in the form Www, dd Mmm yyyy hh:mm:ss GMT, where:

¥Aliasing

JavaScript 的 Date API 受到 Java 的 java.util.Date 库的启发（而后者自 1997 年 Java 1.1 以来已成为事实上的遗产）。特别是，Java Date 类有一个名为 toGMTString 的方法，该方法的命名很糟糕，因为 格林威治标准时间 不等于 协调世界时，而 JavaScript 日期始终按 UTC 时间运行。出于 Web 兼容性原因，toGMTString 仍然作为 toUTCString 的别名，并且它们引用完全相同的函数对象。这意味着：

¥JavaScript's Date API was inspired by Java's java.util.Date library (while the latter had become de facto legacy since Java 1.1 in 1997). In particular, the Java Date class had a method called toGMTString — which was poorly named, because the Greenwich Mean Time is not equivalent to the Coordinated Universal Time, while JavaScript dates always operate by UTC time. For web compatibility reasons, toGMTString remains as an alias to toUTCString, and they refer to the exact same function object. This means:

Date.prototype.toGMTString.name === "toUTCString";

¥Examples

¥Using toUTCString()

const d = new Date(0);
console.log(d.toUTCString()); // 'Thu, 01 Jan 1970 00:00:00 GMT'

¥See also

• Date.prototype.toLocaleString()
• Date.prototype.toString()
• Date.prototype.toISOString()