Hegira

Aftermath and legacy

The second RashidunCaliph, Umar ibn Al-Khattab, designated the Muslim year during which the Hegira occurred the first year of the Islamic calendar in 638 or the 17th year of the Hegira. This was later Latinized to Anno Hegirae, the abbreviation of which is still used to denote Hijri dates today. Burnaby states that: "Historians in general assert that Muhammad fled from Mecca at the commencement of the third month of the Arabian year, Rabi 'u-l-awwal. They do not agree as to the precise day. According to Ibn-Ishak, it was on the first or second day of the month".