Islamic Republic of Iran
Who & why: mass protests through 1978 force Mohammad Reza Shah into exile in January 1979; Ayatollah Ruhollah Khomeini returns from exile on 1 February 1979, and a referendum that April establishes the Islamic Republic, with a new constitution later that year vesting ultimate authority in a Supreme Leader alongside elected president and parliament. The system has governed Iran continuously since.
What it represents: the green-white-red tricolor of 1907 is retained and the lion and sun replaced by the emblem designed by Hamid Nadimi, with the Takbir (Allahu Akbar) repeated 11 times on each of the green and red bands, 22 in all, standing for the revolution's victory on 22 Bahman 1357 (11 February 1979). The Interim Government removed the crown from the naval ensign in 1979, the older flags stayed in use until 1980, and the current flag was adopted in July 1980.
Wikipedia: Interim Government removed the crown from the naval ensign in 1979; older flags stayed in use until 1980; current flag adopted July 1980, designed by Hamid Nadimi, Takbir 11 times on each band, 22 in total. FOTW: traditional flags abolished after the shah's abdication in 1979; 22 refers to the victory of the revolution on 22 Bahman 1357.
- Flag of Iran — Wikipedia compiled
- Iran — Flags of the World (CRW Flags) compiled
Not established: The sources give only July 1980; the 'tulip' reading of the emblem is not in either.