Ashura Day (Muharram 10), Muharram 10. This day is recognized one of the most significant events in the Hijri calendar, commemorating the events of Karbala, where Husayn ibn Ali and his companions were killed in battle against the Umayyad forces. The event took place in the year 61 Hijri, with reports indicating that around 72 companions of Husayn ibn Ali lost their lives. In Iran and many Islamic countries, Ashura is observed with mourning ceremonies and various rituals. The day holds an important place in the culture and history of Muslims and is marked annually with gatherings and special commemorations.