Capital: Tehran. Other Major Cities (in order of population): Mashhad, Esfahan, Tabriz, Karaj, Shiraz, Qom, and Ahvaz. Independence: In the modern era, Iran always has existed as an independent country. Public Holidays: The national holiday, Islamic Revolution Day, celebrates the victory of the Islamic Revolution on February 11, 1979. Other official holidays are Dawn (the return of Ayatollah Khomeini from 14 years of foreign exile on February 1, 1979), Noruz (Iranian New Year, March 21), Islamic Republic Day (April 1), Thirteenth Day of New Year (April 2), and several Islamic religious holidays that are reckoned in accordance with the lunar calendar and thus do not re-occur on the same dates each year.