🎄 查找圣诞节Find Christmas Day
给出某年圣诞节（12 月 25 日）的日期与星期。本地处理。Christmas Day (25 December) and its weekday for a given year. Processed locally.
使用说明与常见问题How-to & FAQ
「查找圣诞节」是什么？What is the Find Christmas Day tool?
给出某年圣诞节（12 月 25 日）的日期与星期。本地处理。Christmas Day (25 December) and its weekday for a given year. Processed locally.
如何使用「查找圣诞节」？How do I use the Find Christmas Day tool?
输入年份（1–9999），下方即显示当年圣诞节的日期和星期。Enter a year from 1 to 9999 to see the date and weekday of Christmas Day that year.
圣诞节的日期会变吗？Does the date of Christmas change?
在公历上总是 12 月 25 日，每年变化的只是星期几。东正教会按儒略历过圣诞，对应公历 1 月 7 日左右，本工具不计算。On the Gregorian calendar it is always 25 December; only the weekday changes. Churches that use the Julian calendar celebrate around 7 January on the Gregorian calendar, which this tool does not compute.
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.
「查找圣诞节」免费吗？需要注册吗？Is the Find Christmas Day tool free? Do I need an account?
「查找圣诞节」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 Christmas 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.