Ten-Day Dawn celebrations, marking the anniversary of the 1979 Islamic Revolution, began on Monday.
A high-profile ceremony was held at Tehran's Mehrabad International Airport, in which Chairman of the Expediency Council Ayatollah Akbar Hashemi Rafsanjani delivered a speech, IRNA reported.
Head of the Atomic Energy Organization of Iran Ali Akbar Salehi, Minister of Culture and Islamic Guidance Ali Jannati and Minister of Roads and Urban Development Abbas Akhoundi were among high-ranking officials who attended the ceremony.
Imam Khomeini, the late founder of the Islamic Republic, arrived at Mehrabad from exile in Paris on Feb. 1, 1979, 10 days before the victory of the Islamic Revolution.
The Iranian nation toppled the Pahlavi regime on Feb. 11, 1979, ending 2,500 years of monarchy in the country.
Every year Iranians mark the anniversary of the Islamic Revolution from Feb. 1 to 11, known as Ten-Day Dawn ceremonies.
On Feb. 11 each year, Iranians take to the streets in large numbers to commemorate the victory anniversary.
In a separate ceremony at the mausoleum of Imam Khomeini, south of Tehran, people celebrated the anniversary of the Imam's return from exile, according to Tasnim News Agency.
Elsewhere in Tehran, at a street leading to Azadi Square, motorcyclists paraded to mark the occasion.
School bells rang across the country to remind the students of the memorable anniversary.
