Margins of the march on 22th Bahman

The anniversary of the Revolution is celebrated on 22 Bahman, which is the 11th month in the persian calendar, equivalent to 11 February in the Gregorian calendar. It commemorates the protests that led to the downfall of the Pahlavi dynasty and the installation of the Islamic Revolutionary which is headed by Khomeini. This political celebration is held on the last day of the celebration called the Ten Days of fajr.