Yom Ashura or Ashura (Arabic: عاشوراء‎, romanized: ʻĀshūrā’ [ʕaːʃuːˈraːʔ]) is the tenth day of Muharram, the first month in the Islamic calendar.[4] It marks the day that Husayn ibn Ali, the grandson of the Islamic prophet Muhammad, was martyred in the Battle of Karbala.[5] Ashura is a major holiday and occasion for pilgrimage and fasting in Shia Islam,[6] as well as a recommended but non-obligatory day of fasting in Sunni Islam.[7][8][9] Ashura shares origins with Yom Kippur from Judaism