Eid al-Fitr
In Iran, at the last days of the month of Ramadan, several groups of experts representing the office of Ayatollah Khamenei go to the different zones of the country to determine the date of Eid al-Fitr. Iranian Muslims take part in the Eid al-Fitr prayer and pay the . The Eid al-Fitr prayer, and the following sermon, has been led by Ayatollah Seyyed Ali Khamenei, Supreme Leader of Iran, at Tehran's Imam Khomeini Grand Prayer Grounds (). The celebration is typically marked by a one- or two-day national holiday.