Photos: Night of Tasua mourning at Imam Zain al-Abidin Hussiniya of Damascus, Syria

The ninth day of Muharram is called Tasu'a, and it refers to Muharram 9, 61/October 9, 680 the day before the Day of 'Ashura. Because of the events that occurred on this day, it is very important to Shia. They attribute this day to 'Abbas b. 'Ali (a) and respect this day the same as the Day of 'Ashura and mourn during it. On this day, great mourning ceremonies are held with the running of mourning, chest-beating and chain-hitting caravans of people.