Commemorating the Martyrdom of Imam Hasan (a.s.) 50 A.H.The months of mourning the grandson of the Prophet who was killed in Karbala also see the marking of the martyrdom of the other grandson of the Prophet – rather, as the Quran calls them, the SONS of the Prophet Muhammad (pbuh). Death – Ayatullah Sayyid Al Mar`ashi An-Najafi, 1411 A.H. (28 Aug 1990)