The Martyrdom of Imam Reza is a significant religious observance in Iran. The holiday commemorates the death of the eighth Shia Imam Ali ar-Ridha, also known as Imam Reza, who is deeply respected and revered in Shiite Islam. The day is marked with sorrowful ceremonies and rituals, during which many Iranians participate to express their grief and honor Imam Reza.

Imam Reza is considered by followers as the rightful successor to the Prophet Muhammad, hence, his martyrdom is a day of mourning in Iran. He is believed to have been martyred in AD 818, and the anniversary of his death is recognized in the Islamic lunar calendar. Pools of tears fall as millions of mourners attend ceremonies, remembering the martyr and his teachings. They wear black clothes as a sign of mourning and gather in mosques and shrines where passionate eulogies echo the mournful atmosphere.

The city of Mashhad, where Imam Reza is buried, is the main setting for the commemoration. Shia Muslims from all over the world travel to Iran to visit his shrine during this period. Although the atmosphere is of mourning and despair, the observance of this holiday is also seen as a period of spiritual renewal. Through the remembrance of their beloved Imam, followers reaffirm their faith and commitment to the teachings of Islam. The holiday, thus, combines an air of sadness with an undercurrent of spiritual rejuvenation.