Arbaeen, also known as “Arbaeen Hussaini”, is the fortieth day after Ashura. Ashura is the tenth day of Muharram, the day on which Imam Hussain (AS), the grandson of the Prophet Muhammad, and his companions were martyred in the Battle of Karbala in 61 AH (680 AD). Arbaeen is calculated by the date of the Hijri calendar and usually falls on the 20th of Safar.

On Arbaeen, a ceremony is held to commemorate the martyrdom of Imam Hussain (AS) and his companions. The day holds special significance in Shia culture, and many Shias make a pilgrimage to the shrine of Imam Hussain (AS) in Karbala. The pilgrimage to Karbala during Arbaeen is one of the largest religious gatherings in the world, with millions of people from all over the world participating in the ceremony.

Arbaeen is an opportunity to remember the values such as justice, sacrifice, and resistance to oppression that Imam Hussein (AS) and his companions fought and were martyred for.