Note 428 — Chapter XXVIII · DEATH OF OMAR. A.H. XXIII. A.D. 644.

Some traditions give the date of his death three days later, i.e. on the last day of Dzul Hijj. This, no doubt, arises from that having been the date on which the new Caliph was chosen, and Omar’s reign is conventionally spoken of as also lasting up to that day—the last day of the year A.H. 23. There is another tradition that he was wounded on Wednesday, 23rd of Dzul Hijj, and buried on the Sunday following, i.e. on the 27th.