Arbaeen

Forty days after the martyrdom of Husayn ibn Ali, Shia Muslims annually observe Arba'in, a day of mourning and pilgrimage to the shrine of Husayn in Karbala, Iraq. The commemoration coincides with the twentieth of Safar in the Islamic calendar and marks the culmination of the Ashura period, which begins with the tenth of Muharram. Arba'in is a significant occasion in Shia Islam, symbolizing the eternal struggle between good and evil, the pinnacle of self-sacrifice, and the ultimate sabotage of Muhammad's prophetic mission.learn more on wikipedia