Spring Fest | 6,033 followers on LinkedIn. True Spirit of Youth | Spring Fest, popularly known as SF, is the annual social & cultural festival of the Indian Institute of Technology, Kharagpur held during the month of January in the spring semester. The Spring Fest is held for 4 nights and 3 days on the weekend closest to 26 January, India's Republic Day. During the fest, students from IIT Kharagpur and from different colleges all over the country participate in a plethora of socio-cultural activities.