On September 10, Iranian Muslims celebrate the birth of Prophet Muhammad and Imam Jafar al-Sadiq, observed on the 17th day of Rabi’ al-awwal in the Islamic calendar. This day is a public holiday in Iran, reflecting the significance of these figures in Shia Islam. While the majority of Sunni Muslims commemorate the Prophet's birthday on the 12th of Rabi’ al-awwal, Shia Muslims honor it on the 17th, aligning with the birth of Imam al-Sadiq. Prophet Muhammad is recognized as the last prophet and messenger of God, who began preaching Islam after receiving revelations from the angel Gabriel. Imam al-Sadiq is noted for founding the Ja’fari jurisprudence, which is predominantly followed by Shia Muslims. As a predominantly Shia Muslim state, Iran places great importance on these observances, marking them with various religious activities and celebrations.