📌 查找特定星期几Find Specific Day

使用说明与常见问题How-to & FAQ

「查找特定星期几」是什么？What is the Find Specific Day tool?

查找某年某月第 n 个星期几（或最后一个）。例如 2024 年 11 月第 4 个星期四。输入：年 月 n 星期(0=日..6=六)，n 为 1-5 或 last（-1）。本地处理。Find the n-th weekday of a month (or the last one), such as the 4th Thursday of Nov 2024. Input: year month n weekday (0=Sun..6=Sat); n is 1-5 or last (-1). Processed locally.

如何使用「查找特定星期几」？How do I use the Find Specific Day tool?

输入“年 月 n 星期”，如 2024 11 4 4（2024 年 11 月第 4 个星期四），n 可写 last 表示最后一个。Enter year month n weekday, such as 2024 11 4 4 for the 4th Thursday of November 2024; use last for n to get the last one.

星期怎么编号？How are weekdays numbered?

0=周日、1=周一 … 6=周六。0 is Sunday, 1 is Monday and so on up to 6 for Saturday.

n 可以填什么？What can n be?

1–5 表示第几个，last 或 -1 表示当月最后一个；其他值（0、-2、6 等）会提示“n 须为 1–5 或 last”。如果当月没有第 5 个该星期，会明确提示。1 to 5 for the first to fifth, or last (or -1) for the last one in the month. Other values such as 0, -2 or 6 give the message "n must be 1–5 or last". If the month has no fifth such weekday, the tool says so.

用的是哪种历法、支持哪些年份？Which calendar and years are supported?

按外推格里高利历（现行公历规则向前沿用）计算，年份为 0001–9999 的整数，输出年份一律 4 位补零（如 0005-12-25）。1e3、0x10 这类写法和多余的内容会报错。The proleptic Gregorian calendar (today's rules applied backwards) for whole-number years 0001 to 9999, always shown with 4 digits such as 0005-12-25. Forms like 1e3 or 0x10 and extra text give an error.

这个工具和时区有关吗？Do time zones affect this tool?

无关。结果只由输入的年份或日期按历法规则算出，不读取设备时钟，也不使用任何时区。No. The result is worked out from the year or date you enter with calendar rules alone; it never reads your device clock or uses a time zone.

输入和输出是什么样的？What does the input and output look like?

例如输入 2024 11 4 4，输出为：2024-11-28。The input 2024 11 4 4 becomes 2024-11-28.

「查找特定星期几」免费吗？需要注册吗？Is the Find Specific Day tool free? Do I need an account?

「查找特定星期几」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Find Specific Day tool is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.