Sadiq Tabataba’ei, who accompanied Imam recalled that he was a bit worried about the travel towards Tehran because airports were still under control of the then Shah regime’s remnants.
Tabataba’ei says he had some anxiety when I consulted to Imam, but “Imam had patiently asked me about the progress regarding the constitution and its process
It was on 12nd Bahman or 1st February 1979, when Imam Khomeini returned to Iran from Paris after 14 years of political exile.
That day is marked as revolution day. The event is celebrated by 10-day festivities each year, called the 10-day dawn.
(Extracted from a collection about Imam and Islamic Revolution history)