Islamic Republic Day is a public holiday in Iran that falls on the twelfth day of the first Persian month, Farvardin. This typically indicates that it is observed on April 1st in the Western calendar.
The Islamic Republic was established in 1979, and this holiday commemorates that occasion.
After 15 years in exile, Ayatollah Ruhollah Khomeini returned to Iran in February 1979 and led the effort to depose Iran's Shah.
Two months later, the new administration staged a vote to establish the Islamic Republic based on a new constitution, displacing the Persian monarchy that had ruled for 2,500 years.
