The hijrah was the “emigration” of the Prophet Muhammad from Makkah to Madinah in 622 CE. When the Prophet and his followers were persecuted in Makkah, the tribes of Madinah promised to protect them and asked the Prophet to resolve disputes between them. The hijrah marks the founding of the first Islamic community under the leadership of the Prophet Muhammad, and thus the year 622 CE is the first year in the Islamic calendar.