What is significance of Feb. 1 in history of Islamic Resolution?

Leader visits Imam Khomeini Mausoleum in Tehran on eve of Revolution anniversary

Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei paid tribute to the late Founder of the Islamic Republic, Imam Ruhollah Khomeini, at his mausoleum in Tehran.

Leader visits Imam Khomeini's mausoleum as Iran begins celebrations

Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei has visited the mausoleum of the late founder of the Islamic Republic Imam Khomeini on the eve of the 43rd anniversary of the Islamic Revolution.