It is commemorated by Shi’a Muslims as a day of mourning for the martyrdom of Husayn ibn Ali, the grandson of Muhammad at the Battle of Karbala on 10 Muharram in the year 61 AH (in AHc: October 9, and in AHt: October 10, 680 CE). According to Sunni Muslim tradition, Ibn Abbas narrates that Muhammad came to Medina and saw the Jews fasting on the tenth day of Muharram. He asked, “What is this?“ They said, “This is a good day, this is the day when Allah saved the Children of Israel from their enemy and Musa (M