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The Tabular Islamic calendar is a rule-based variation of the Islamic calendar, in which months are worked out by arithmetic rules rather than by observation or astronomical calculation. It has a 30-year cycle with 11 leap years of 355 days and 19 years of 354 days. In the long term, it is accurate to one day in about 2,500 solar years or 2,570 ...
For Hijri years since 1297 AH (1879/1881 CE), the Gregorian date of 1 Muharram, the first day of the year in the Islamic calendar, is given. The first Hijri year (AH 1) was retrospectively considered to have begun on the Julian calendar date 15 July 622 (known as the 'astronomical' or 'Thursday' epoch, Julian day 1,948,439) or 16 July 622 (the ...
Ancient Persian considered this the first day of their New Year: December 21: December 22: December 23 10 Bahman: Sadeh: 50 days before Nowruz: January 29: January 30: January 31 22 Bahman: Anniversary of Islamic Revolution: Public holiday in Iran: February 10: February 11: February 12 5 Esfand: Sepandārmazgān: Described as "Persian Day of ...
30 Muharram September 29, 2019 Shia day of Mourning: 20th day of Ashura: Note: Observed next day in years in which Muharram has only 29 days 1-30 Safar: September 30 - October 28, 2019 2nd Month of the Islamic Calendar 1 Safar September 30, 2019 Two Shia Days of Remembrance: 7 Safar October 6, 2019 Birth of Imam Musa-e-Kazim, 128 A.H. 10 Safar
There is another version where, in addition, the fourth leap day is postponed to year 11 and the last leap day is in the last year of the 30-year cycle. The mean number of days per month in the 30-year cycle is 29.53056 days, or 29d 12h 44m. Six months of 29 days and six with 30 days, plus 11 days of the leap years.
The Islamic calendar is a purely lunar calendar, and months begin when the first crescent of a new moon is sighted. Since the Islamic lunar year is 11 to 12 days shorter than the tropical year, Jumada al-Awwal migrates backwards throughout the seasons in a cycle of about 33 solar years.
The first six months have 31 days, the next five thirty, and the twelfth has 29 days and 30 in leap years. It specified the origin of the calendar to be the Hijrah of Muhammad from Mecca to Medina in AD 622. [7] It also deprecated the 12-year cycles of the Chinese-Uighur calendar which were not officially sanctioned but were commonly used.
A year in the Islamic lunar calendar consists of twelve lunar months and has only 354 or 355 days in its year. Consequently, its New Year's Day occurs ten days earlier each year relative to the Gregorian calendar. The year 2025 CE corresponds to the Islamic years AH 1446 – 1447; AH 1446 corresponds to 2024 – 2025 in the Common Era. [a]
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