Abu'l Hasan ?Ali az-Zahir li A'zaz li Din-illah (20 June 1005 – 13 June 1036) (Arabic: ?????? ??????) was the Seventh Caliph of the Fatimids (1021–1036).
Az-Zahir assumed the Caliphate after the disappearance of his father Al-?akim bi Amr al-Lah.
According to the Hijri Calendar, his birth date is 3rd of Ramzaan 395 A.H.