Sputnik is live from Tehran, as Iranians gather in the capital for a "Dey 9" pro-government rally.
The demonstration marks the 12th anniversary of the original protests, which took place after the Iranian presidential election in 2009.
After the opposition started mass demonstrations to protest against the outcome of the vote, pro-government forces organised their own counter-protests, naming them after the ninth day of the Iranian month.
Dey is the tenth month of the Solar Hijri calendar, used in the Islamic Republic. It begins in mid-December and ends in January.
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