星期计算器.

用您自己的语言查询任何日期——过去、现在或未来——是星期几。

设备端计算无需注册

输入数值

输入时结果会更新。

02 / 答案

使用方法

系统会根据您所选语言自动生成星期名称。本计算器采用外推格里高利历（proleptic Gregorian calendar），与 JavaScript 及大多数软件所用的历法相同，因此结果与电子表格及数据库的日期函数一致。

常见问题

What day of the week was I born on?

Enter your date of birth into the date field and the calculator shows the weekday immediately, along with the ISO weekday number and whether it was a weekend.

What is the ISO weekday number?

ISO-8601 numbers weekdays Monday = 1 through Sunday = 7. JavaScript and many spreadsheets instead use Sunday = 0 through Saturday = 6. This calculator shows both so you can match whichever system your software uses.

Does the calculator work for dates before 1900?

Yes. It handles dates before 1970 and even years below 100 correctly. It uses the proleptic Gregorian calendar, so results match standard software date functions rather than the Julian calendar historically used before 1582.

Will the weekday name show in my language?

Yes. The weekday name is generated from your selected site language using the browser's internationalization support, so it appears in your own language and script rather than always in English.

Which dates count as the weekend?

This calculator labels Saturday and Sunday as the weekend, the most common convention. Some countries use Friday-Saturday or a different pairing, so adjust for your local working week.

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