Rashidun Caliphate

Umar establishes the Islamic calendar
Caliph Umar I started the Muslim calendar. ©HistoryMaps
639 Jan 1

Umar establishes the Islamic calendar

Medina Saudi Arabia

Caliph 'Umar I started the Muslim calendar counting it from the lunar month, Muharram, in the year of the Prophet's migration to Medina, 16 July in 622 CE.

Last Updated: Mon Feb 05 2024

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