Iranian calendar


August 13, 2022

The Iranian (Persian) calendar is a solar Hijra calendar, developed with the participation of Omar Khayyam and since then refined several times, it counts from the Hijra, but consists of a solar (tropical) year, unlike the classical Islamic calendar, so its months always fall on the same same time of year. The beginning is the day of the spring equinox (Nowruz, or Persian-Tajik Aje). Leap years are defined differently than in the Gregorian calendar: a year is considered a leap year, when dividing the numerical value by 33, the remainder is 1, 5, 9, 13, 17, 22, 26, or 30; thus, in each 33-year period there are 8 leap years, and the corresponding mean length of the year is 365.24242 days, giving an error of one day in 4500 years. In this regard, the Persian calendar is more accurate than the Gregorian calendar. Until 1925, in Iran (Persia), despite the antiquity and popularity of the Iranian calendar, only the classic Islamic calendar was officially used (according to documents of the shah's government, the Russian mission led by Griboyedov was destroyed on Shaban 6, 1244, i.e., February 11, 1829). After 1925, the Persian calendar became official, but the popular 12-year animal cycle of the Chinese calendar was banned. Nowadays, in addition to Iran, the Persian calendar has been officially used since 1957 in Afghanistan, especially in Iranian-speaking (Dari and Tajik) regions. However, in Afghanistan, instead of the Persian names of the months, the names of the signs of the zodiac are used: the Dari speakers use Arabic, the Pashtuns use Pashtun.


An online Persian/Gregorian date converter, Persian calendar for mobile (j2me)