Muharrum is the first month of the Islamic calendar, and it is considered one of the most important months for Muslims. It is often referred to as the month of remembrance as it marks the martyrdom of Prophet Muhammad's grandson, Imam Hussain. There are several synonyms for the word Muharrum, including Al-Hijra, Islamic New Year, Ashura, and Safar. Al-Hijra represents the migration of Prophet Muhammad from Mecca to Medina, which is considered as a significant event in Islamic history. Ashura is the tenth day of Muharrum, which is marked as a mourning day by the Shia Muslims to remember the death of Imam Hussain. Safar is the following month after Muharrum in the Islamic calendar.