Islamic Republic Day sees ceremonies take place in Tehran's Valiasr Square on Tuesday, March 31.

It commemorates the 1979 Iranian referendum, which led to the establishment of the Islamic Republic following the revolution and the overthrowing of the monarchy.

Observed annually on 12 Farvardin in the Iranian calendar, the occasion is marked by official ceremonies and speeches, public gatherings and rallies, and state media coverage highlighting the revolution, with some events also featuring military displays.