Note 27 — Chapter I
Reading edition
This flight of the prophet, called the Hejira, (i.e., emigration,) was deemed afterwards of such importance that it was instituted by Omar, the second Khalif, as the starting-point of the Mohammedan era, which was, however, made to commence about two months before, on the first day of that Arabian year, which coincides with July 16th, 622, A.D.