What name is given to the 622 AD migration of the Prophet Muhammad and his followers from Mecca to Medina, which serves as the starting point for the Islamic calendar?

Hijra

The Hijra allowed the early Muslim community to escape persecution and establish an organized religious and political community in Medina. The Islamic lunar calendar uses AH, from the Latin 'Anno Hegirae,' meaning 'in the year of the Hijra.'