Imamzadeh Glorification Day is observed in Iran on 5 Dhu al-Qidah of the Islamic calendar, which corresponds to May 18 in 2026. Established by the Supreme Council of the Cultural Revolution in 2013, this holiday honors the descendants and relatives of the Prophet Muhammad, known as imamzadeh. On this day, many Iranians participate in pilgrimages to significant burial sites, including the Imam Reza shrine in Mashhad, the Shrine of Fatima Masumeh in Qom, Imamzadeh Saleh in Tehran, and the Mausoleum of Ruhollah Khomeini in Tehran. Celebrations typically include Quran readings and lectures focused on the lives and contributions of Muhammad's descendants. The holiday aims to elevate the spiritual consciousness of the Iranian people.