🔁 生成回文日历日期Generate Palindromic Calendar Dates
列出某年中 YYYYMMDD 为回文的日期。本地处理。List dates in a year whose YYYYMMDD digits are a palindrome. Processed locally.
使用说明与常见问题How-to & FAQ
「生成回文日历日期」是什么？What is the Generate Palindromic Calendar Dates tool?
列出某年中 YYYYMMDD 为回文的日期。本地处理。List dates in a year whose YYYYMMDD digits are a palindrome. Processed locally.
如何使用「生成回文日历日期」？How do I use the Generate Palindromic Calendar Dates tool?
输入年份（1–9999），下方即列出当年 YYYYMMDD 为回文的日期。Enter a year from 1 to 9999 to list the dates that year whose YYYYMMDD digits are a palindrome.
回文日期是怎么判断的？How is a palindromic date found?
把日期写成 8 位数字 YYYYMMDD（年份补零到 4 位），正读反读相同即算，例如 2021-12-02 是 20211202。The date is written as the 8 digits YYYYMMDD with a 4-digit year, and it counts if it reads the same both ways; 2021-12-02 is 20211202.
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 1010，输出为：1010-01-01。The input 1010 becomes 1010-01-01.
「生成回文日历日期」免费吗？需要注册吗？Is the Generate Palindromic Calendar Dates tool free? Do I need an account?
「生成回文日历日期」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 Generate Palindromic Calendar Dates 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.