Hijrî Shamsî And Hijrî Qamarî Calendars

According to historians, the Prophet entered the cave at the Sawr Mountain towards evening on Thursday, 27th of Safar, 622 A. C. , on his emigration from al-Makkat al-Mukarrama to al-Madînat al-Munawwara. He left the cave on Monday night and entered Qubâ, a quarter near Medina, on Monday, 8th of Rabî'al-awwal (20th of September, 622). The beginning of the Hijrî Shamsî calendar adopted by the Shî'ites is six months before this. That is, the Nawruz festival of the Mejûsî disbelievers (fire worshippers) begins on March 20th. This happy day became the beginning of Muslims' Hijrî shamsî calendar. On Thursday, day and night were equal, and he left Qubâ and entered Medina on Friday. The outset of the month of Muharram in the same year (Friday, 16th of June) was accepted as the beginning of Hijrî qamarî calendar. The Hijrî shamsî year coinciding with any Western new year's day is 622 years less than that Western new year. And the Western year coinciding with any Hijrî shamsî year's day is 621 more than that Hijrî shamsî new year.