(50G) Easter, Hebrew Cal+molad,Julian/Gregorian date conversion for any date and JD#. +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (https://www.hpmuseum.org/forum/forum-10.html) +--- Forum: General Software Library (https://www.hpmuseum.org/forum/forum-13.html) +--- Thread: (50G) Easter, Hebrew Cal+molad,Julian/Gregorian date conversion for any date and JD#. (/thread-23257.html)

(50G) Easter, Hebrew Cal+molad,Julian/Gregorian date conversion for any date and JD#. - Gil - 2025-03-11 4 main programs: —> WK.D: gives the weekday.  EASTER: gives Christian Eastern Sunday.  HEB—>: from Hebrew calendar (year, month, day), returns the corresponding Julian&Gregorian dates, weekday, together with the start and end of the Jewish year with also the length of each of the 12/13 months of the Jewish year, the beginning of the Hebrew Pesach or Passover (Nisan 15) and also the exact date&time of the corresponding molad relative to the given Hebrew month (the 1st of that month, or 1/2 days before the 1st of that month).  —>HEB: the reverse, from Julian/Gregorian calendar/date toward Hebrew calendar/date, with also the exact date&time corresponding molad relative to calculated Hebrew month. And 6 help utility calendar programs: Jc—>Gc: Julian calendar/date into Gregorian  calendar/date. Gc—>Jc: Gregorian calendar/date into Julian  calendar/date. Jc—>Jd: Julian calendar/date into Julian day #.  Jd—>Jc: Julian day # into Julian calendar/date.  Gc—>Jd: Gregorian calendar/date into Julian day #.  Jd—>Gc: Julian day # into Gregorian calendar/date. Other variables names (in lower case) are subroutines and a variable used in the previous 10 programs.  According to Gauss' algorithm for the Hebrew calendar and thanks to Peter Baum for the last four above mentioned programs. A "correction" was introduced in Gauss' algorithm to find Nisan 15 th. When finding M and m, if m<0, then (m=m+1; M=M-1), else (m=m; M=M). RE: 50G Easter, Hebrew Cal, Julian/Gregorian date conversion for any date and JD#. - Gil - 2025-03-15 Version 3 Small change in final output. RE: (50G) Easter, Hebrew Cal, Julian/Gregorian date conversion for any date and JD#. - Gil - 2025-03-22 Version 19 Now the several hundred data checked were all correct between Hebrew/Julian/Gregorian calendars, even for the first day of the Tishrei Hebrew month (previous versions gave an unnoticed error for that specific day of each Hebrew year).  See observation in post 1. RE: (50G) Easter, Hebrew Cal+molad,Julian/Gregorian date conversion for any date and JD#. - Gil - 2025-03-30 In this new version 19,  automatical calculation of the exact date&time of the corresponding molad relative to the given or calculated Hebrew month.