Ashura is a day of commemoration in Islam. It occurs annually on the 10th of Muharram, the first month of the Islamic calendar. Among Shia Muslims, Ashura is observed through large demonstrations of high-scale mourning as it marks the death of Husayn ibn Ali, who was beheaded during the Battle of Karbala in 680 CE. Among Sunni Muslims, Ashura is observed through celebratory fasting as it marks the day of salvation for Moses and the Israelites, who successfully escaped from Biblical Egypt after Moses called upon God's power to part the Red Sea. While Husayn's death is also regarded as a great tragedy by Sunnis, open displays of mourning are either discouraged or outright prohibited, depending on the specific act.