儒略日 （英語： Julian Day ）是在儒略週期內以連續的日數計算時間的計時法，主要是 天文學家 在使用。. 儒略日數 （英語： Julian Day Number ， JDN ）的計算是從 格林威治標準時間 的中午開始，包含一個整天的時間，起點的時間（0日）回溯至 儒略曆 的 西元前4713 For example, Gregorian calendar was not used prior to around October 1582. A function to test if a given Gregorian calendar year is a leap year is also defined. Zero point of Modified Julian Date (MJD) and the MJD of 2000/1/1 12:00:00 are also given as module level constants. Examples. Some examples are given below. A Julian day calendar template for the year 2021 is available in portrait format with Gregorian date and public holidays. It also includes previous and next month to facilitate planning for future. Preview Download This is because the Julian calendar assumes that a year is 365.25 days long, when in fact, it is just over 365.24 days. As the Julian calendar shifted, it lost its alignment with the solstices and .

year in julian calendar