Dahe-ye Fajr (Persian: دهه فجر, lit. 'ten days of dawn'), i.e. dawning of new age, is a ten-day celebration of Ruhollah Khomeini's return to Iran in 1979. The annual celebrations last from 1 to 11 February. The start of the celebration coincides with the date of Ruhollah Khomeini's arrival and the ending with Revolution's victory, a day which is called Islamic Revolution's Victory Day or 22 of Bahman.
Dahe-ye Fajr marks the anniversary of the ten days from Khomeini's return to Iran (1 February) until the victory day of the Revolution (22 Bahman; 11 February) in 1979.
On the first of February 1979, Ayatollah Khomeini returned to Tehran after a period of being exiled by Muhammad Reza Pahlavi to France. Several million people went to the Mehrabad International Airport for welcoming Ayatollah Khomeini. Khomeini, then went to Behesht-e Zahra cemetery where he gave a lecture. Khomeini expressed that Shapour Bakhtiar's cabinet was illegal. Also, he said he would crash in the mouth of the Bakhtiar's government.
Ayatollah Khomeini choose Mehdi Bazargan as prime minister of interim government.
Iran air force officers went to Khomeini's home and promised their loyalty to the revolution.
People were armed by the revolutionary personnel of the air force. In this day a curfew was announced by Bakhtiar's government but Ruhollah Khomeini disparaged it and said people had to break it. Then revolutionaries subjugated police stations, prisons and governmental centers.
Senior military commanders announced that they were neutral in conflict between Bakhtiar's government and revolutionaries. Thus they receded from the streets. Bakhtiar resigned and went to Paris. Revolutionaries gained a victory in this day.