📅 儒略历转公历日期Convert Julian Date to Gregorian Date

使用说明与常见问题How-to & FAQ

「儒略历转公历日期」是什么？What is the Convert Julian Date to Gregorian Date tool?

把儒略历日期换成同一天的公历（格里高利历）日期。本地处理。Convert a Julian-calendar date to the Gregorian date for the same day. Processed locally.

如何使用「儒略历转公历日期」？How do I use the Convert Julian Date to Gregorian Date tool?

输入儒略历日期 YYYY-MM-DD，下方即显示同一天的公历日期和星期。Enter a Julian-calendar date as YYYY-MM-DD to see the same day on the Gregorian calendar, with its weekday.

这里的“儒略历日期”是什么？What is a Julian date here?

指儒略历上的年-月-日，不是天文学的儒略日编号（JDN）。儒略历每 4 年一闰，所以 1900-02-29、2100-02-29 都是有效输入。A year-month-day on the Julian calendar, not an astronomical Julian Day Number. The Julian calendar has a leap year every 4 years, so 1900-02-29 and 2100-02-29 are valid input.

结果用的是哪种公历？Which Gregorian calendar is the result on?

外推格里高利历：1582 年以前也按现行公历规则计算，所以 0001-01-01（儒略历）会得到 0000-12-30。年份按 4 位补零。The proleptic Gregorian calendar, so dates before 1582 are also shown with today's rules; Julian 0001-01-01 becomes 0000-12-30. Years are always shown with 4 digits.

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

无关。这里只做纯日历或数字运算，不读取设备时钟，也不使用任何时区，所以在哪里打开结果都一样。No. It does pure calendar or number arithmetic, never reads your device clock and uses no time zone, so the result is the same wherever you open the page.

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

例如输入 2020-01-01，输出为：2020-01-14。The input 2020-01-01 becomes 2020-01-14.

「儒略历转公历日期」免费吗？需要注册吗？Is the Convert Julian Date to Gregorian Date tool free? Do I need an account?

「儒略历转公历日期」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 Convert Julian Date to Gregorian Date 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.