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  2. Julian calendar - Wikipedia

    en.wikipedia.org/wiki/Julian_calendar

    Alexander Jones says that the correct Julian calendar was in use in Egypt in 24 BC, [54] implying that the first day of the reform in both Egypt and Rome, 1 January 45 BC, was the Julian date 1 January if 45 BC was a leap year and 2 January if it was not. This necessitates fourteen leap days up to and including AD 8 if 45 BC was a leap year and ...

  3. Old New Year - Wikipedia

    en.wikipedia.org/wiki/Old_New_Year

    The Old New Year, the Orthodox New Year, also known as Ra's as-Sanah or Ras el-Seni in the Middle East, is an informal traditional holiday, celebrated as the start of the New Year by the Julian calendar. In the 20th and 21st centuries, the Old New Year falls on January 14 in the Gregorian calendar.

  4. Conversion between Julian and Gregorian calendars - Wikipedia

    en.wikipedia.org/wiki/Conversion_between_Julian...

    No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the

  5. List of dates for Easter - Wikipedia

    en.wikipedia.org/wiki/List_of_dates_for_Easter

    The earliest dates for Easter in the Eastern Orthodox Church between 1875 and 2099 are April 4, 1915 and April 4, 2010 (Gregorian). Both dates are equivalent to 22 March in the Julian Calendar. The next earliest date for Orthodox Easter, March 23 in the Julian Calendar, last occurred in 1953, and will next occur in 2037. Both of these dates are ...

  6. Julian day - Wikipedia

    en.wikipedia.org/wiki/Julian_day

    The Julian date (JD) of any instant is the Julian day number plus the fraction of a day since the preceding noon in Universal Time. Julian dates are expressed as a Julian day number with a decimal fraction added. [8] For example, the Julian Date for 00:30:00.0 UT January 1, 2013, is 2 456 293.520 833. [9]

  7. Dominical letter - Wikipedia

    en.wikipedia.org/wiki/Dominical_letter

    The Revised Julian calendar date of Easter is JD + S − 1. Example. What is the date of Easter in 2017? 2017 + 1 = 2018. 2018 ÷ 19 = 106 remainder 4. Golden number is 4. Date of paschal full moon is April 2 (Julian). From "week table" April 2, 2017 (Julian) is Saturday. JD = April 3. 2017 − 100 = 1917. 1917 ÷ 100 = 19 remainder 17. N = 19 ...

  8. Revised Julian calendar - Wikipedia

    en.wikipedia.org/wiki/Revised_Julian_calendar

    The Revised Julian calendar has the same months and month lengths as the Julian and Gregorian calendar, but, in the Revised Julian version, years evenly divisible by 100 are not leap years, except that years with remainders of 200 or 600 when divided by 900 remain leap years, e.g. 2000 and 2400 as in the Gregorian calendar. [3]

  9. Old Style and New Style dates - Wikipedia

    en.wikipedia.org/wiki/Old_Style_and_New_Style_dates

    The Gregorian calendar was implemented in Russia on 14 February 1918 by dropping the Julian dates of 1–13 February 1918, [h] pursuant to a Sovnarkom decree signed 24 January 1918 (Julian) by Vladimir Lenin. The decree required that the Julian date was to be written in parentheses after the Gregorian date, until 1 July 1918. [19]