The Martyrdom of Imam Ali is observed in Iran on the 21st day of the Islamic month of Ramadan. This day commemorates the death of Imam Ali, the cousin and son-in-law of the Prophet Muhammad, who was the first male to accept Islam and the first Imam after Muhammad’s passing in 632. Imam Ali is a significant figure in Islam, recognized by Sunnites as the last of the four Caliphs and honored by Shiites as a saint and leader. His assassination by a Kharijite in the Great Mosque of Kufa marked a pivotal moment in Islamic history, leading to the division between Sunnites and Shiites. Following his death, his followers chose his son Hasan as the second Imam. The day is marked by various religious observances and is a public holiday in Iran, reflecting the deep respect and honor held for Imam Ali among Muslims.