Millions of Iranians have taken to the streets across the country to mark the 35th anniversary of the victory of the 1979 Islamic Revolution.
On Tuesday, the country is witnessing nationwide demonstrations in celebration of the 1979 Islamic Revolution that put an end to the monarchical rule of the US-backed Pahlavi regime.
By attending the rallies, the demonstrators are reaffirming their allegiance to the ideals of the Islamic Revolution and Ayatollah Ruhollah Khomeini, the late founder of the Islamic Republic.
The day, the 22nd of the month of Bahman on the solar calendar, coincides with a definitive end to the rule of the monarchical Pahlavi regime and thus an end to the 2,500 years of monarchical rule in the country. The Islamic Revolution, under the leadership of Imam Khomeini, established a new political system based on Islamic values and democracy.
Fireworks and colorful illuminations brightened the nights of many Iranian cities on the eve of the demonstrations.
Iranian President Hassan Rouhani is scheduled to deliver a speech at a celebratory event in Tehran.
Officials say over 100 foreign and around 200 local correspondents will cover the event.