The annual ceremonies are underway in the capital Tehran and other cities and will continue until noon.
Many families along with their children wave the Iranian flags and speakers blare out songs reminiscent of the revolution days over four decades ago.
The participants renew their allegiance to the Revolution and its Leader Ayatollah Seyyed Ali Khamenei as well as the founder of the Islamic Republic Imam Khomeini.
On February 1, 1979, Imam Khomeini the leader of the Revolution returned to his home country after fifteen years of exile.
The Revolution led to the ouster of the former monarch Mohammad Reza Pahlavi and achieved victory ten days later on February 11.
