The 28th day of the Islamic month of Safar is a public holiday in Iran. It commemorates two important events to Shia Muslims, the Death of Prophet Muhammad and Martyrdom of Imam Hassan.
Death of Prophet Muhammad
Having ensured his global and enduring legacy by establishing one of the world's great religions, Islam, Muhammad died on Monday June 8th 632 (14-Rabi al-awwal-11). Though the cause of his death wasn't recorded, it is generally assumed it was due to a fever.
The Prophet was buried where he died in Aisha's house. During the reign of subsequent caliphs, the area of the burial was expanded to become the Mosque of the Prophet with the dome above the tomb added in the 13th century and the complex being a burial site for other notable figures of early Islam. When Medina was conquered by the Wahhabis in 1806, the tomb was stripped of its gold and ornaments, though it narrowly avoided being destroyed, a fate that happened to many Islamic burial sites in the region for religious reasons.
Martyrdom of Imam Hassan
Imam Hassan was a grandson of the Muhammad, the eldest son of Ali and Muhammad's daughter Fatimah, and was the older brother of Husayn. Among Shia Muslims, Hasan is revered as the second Imam
It is believed that Hussan was poisoned by his wife in Medina, Saudi Arabia on the orders of the Caliph Muawiya, who wanted to ensure the succession of his son.
The shrine containing Hasan's tomb was destroyed in 1925 during the second Wahhabi conquest of Medina as part of a general destruction of memorials in cemeteries.
