An abbreviation for ‘After HijrahDeparture/migration. In Islam, Hijrah refers to the journey/migration undertaken by Prophet Muhammad (ṣ) and his followers from Mecca to Medina to ensure their safety from pagan persecution in the year 622 AD. The year of... More.’ Used in English to denote the current era of the Islamic lunar calendar. This era began with the Prophet’s and early Muslims’ migration from Mecca to Medina (the event was known as ‘Hijrah’) and took place in 622 AD.