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Jan 1, 610
Gabriel appears to Muhammad
At 40 years of age Muhammad's preachings were interrupted by an apparation of the angel Gabriel. Through Gabriel, God transferred his word to Muhammad who had people memorize it and it ended up with the Quran. -
Jan 1, 622
Hijra
The beginning of the Islamic calendar is marked with the Hijra or Muhammad's flee from Mecca to Medina.
