Muharram and Ashura

Main articles: Battle of Karbala, Day of Ashura, and Mourning of Muharram

Shia muslims in Dar es Salaam, Tanzania listening to a lecture, one of the activities in the Mourning of Muharram

Shia Muslim children in Amroha, India on camels in front of Azakhana as part of the procession commemorating events on & after Day of Ashura

Muharram is a month of remembrance that is often considered synonymous with the event of Ashura. Ashura, which literally means the "Tenth" in Arabic, refers to the tenth day of Muharram. It is well-known because of historical significance and mourning for the martyrdom of Husayn ibn Ali, the grandson of Prophet Muhammad.^[1]
Shias start the mourning from the 1st night of Muharram and continue for 2 months and 8 days. However the first days are the most important since these were the days where Imam Husayn and his family and followers (consisting of 72 people, including women, children and aged people) were killed by army of Yazid I on his orders, Surviving members of the family of Hussain and that of his followers were taken captive and marched to Damascus and imprisoned there.
Muharram is also observed by Dawoodi Bohras in the same way as Shias.They practice prayers on the sayings of the present dawah of Bohras, Syedna Mohammad Burhanuddin Saheb. On the tenth day of Muharrum, they pray for Husayn till the magrib namaz. When the namaz ends, Husayn is considered shahid by Yazid. it is also close to the day of resarection because it said in a book that this world will one day come to an end on friday 10th of muharam.