Where does the Year One begin in the Moslem calendar?

The Year One in the Islamic calendar, also known as the Hijri calendar, begins with the Hijra, the migration of the Prophet Muhammad from Mecca to Medina in 622 CE. This event marks the establishment of the Muslim community and is a pivotal moment in Islamic history. The calendar is lunar-based, consisting of 12 months, and is used primarily for religious purposes within the Muslim community.