Hijrah

The Hijrah (Arabic: الهجرة) was the journey the Islamic prophet Muhammad and his followers took from Mecca to Medina. The year in which the Hijrah took place is also identified as the epoch of the Lunar Hijri and Solar Hijri calendars; its date equates to 16 July 622 in the Julian calendar. The Arabic word hijra means primarily "a severing of ties of kinship or association." It has been also transliterated as Hegira in medieval Latin, a term still in occasional use in English.

Early in Muhammad's preaching of Islam, his followers only included his close friends and relatives. Most of his tribesmen, the Quraysh, however, were indifferent to his activities, as they did not appear to be particularly interested in devotional meetings, and accordingly, Muhammad did not encounter any serious opposition from them; that was the case until he began to attack their beliefs, which caused tensions to arise.

In May 622, after having convened twice with members of the Medinan tribes of Aws and Khazraj at al-'Aqabah near Mina, Muhammad secretly left his home in Mecca to emigrate to their city, along with his friend, father-in-law and companion Abu Bakr.