Um al-Qura Calendar

Um al-Qura calendar code:
Abu Hadi wrote it in the beginning of the nineties between 1992 and 1993 AD and was published on Arabic programming sites on 09/02/2001 AD, and this is to preserve the intellectual right of the programmer after the many users of this code with or without  changing the scope and attributing it to them without mentioning the source.

Um al-Qura calendar:
Hijri astronomical lunar calendar, which is the official calendar for the Saudi Arabia. The first number of the calendar was issued in the year 1346 AH, 1927 AD from the government press in Makkah.

Calendar data sources:
• 1419-1300 AH: The first phase, the comparative calendar of Um al-Qura, issued by the Ministry of Finance and National Economy, implemented and printed by the Government Press Service, Riyadh 1413 AH.
• 1422-1420 AH: The second phase, and
• 1450-1423 AH: The third phase, the Um al-Qura calendar, issued by the King Abdulaziz City for Science and Technology, the Institute for Computer and Electronics Research.
• 1600-1451 AH: The Al-Mustafa Calendar program, one of Abu Hadi's astronomical programs.