The first ten days of Muharram are the days of the sufferings of Ahlul Bayt (AS) which started on the arrival in Karbala on the second day of Muharram and ended on the tenth day of Muharram which is called Aashura, when Imam Husain (AS) was martyred along with his family members and companions in Karbala in year 61 After Hijra. These ten days are been observed by Ahlul Bayt (AS) and their followers as days of mourning and grief. Imam Reza (AS) said that his father Imam Musa Al-Kadhim (AS) was always observing these ten days with grief and sadness.
Followers of Ahlul Bayt (AS) observe these ten days with Majaalis (religious gatherings and sermons) remembering the tragedies of Karbala and the aims and teachings of Imam Husain (AS). Millions of believers attend these gatherings all over the world, and thousands of lectures and sermons are delivered to enlighten people and purify their behavior and make them better human beings. Millions of poor people are been fed during these ten days as a practice of generosity which is part of the teachings of Imam Husain (AS).