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What is Ashura
Ashura (transliteration: ‘Āshūrā’, Ashura, Ashoura, and other spellings) It is on the 10th day of Muharram in the Islamic calendar and marks the climax of the Remembrance of Muharram but not the Islamic month. It is also called Yaumu-l ‘Ashurah, or simply Ashura meaning, ‘the tenth day’.
It is well-known because of historical significance and mourning for the martyrdom of Husayn ibn Ali, the grandson of the Islamic prophet Muhammad at the Battle of Karbala in the year 61 AH (AD 680). It is a day of speeches, public processions, and great grief. Men and women chant and weep, mourning Husain, his family, and his followers. Speeches emphasize the importance of the values for which Husain sacrificed himself, his family, and his followers.

The Shiite Muslims commemorate the Battle of Karbala and consider this a month of sadness and mourning