Alcheringa, also known as "Alcher", is the annual cultural festival of Indian Institute of Technology (IIT), Guwahati. The festival was started in 1996 by a group of students of IIT Guwahati. Spread over 3 days and 4 nights, Alcheringa is conducted towards the end of January every year. The 25th edition held from 30 January 2021 to 2 February 2021, witnessing 80 events. The festival features one of India's biggest rock band competitions, Rock-o-Phonix. The latest edition of Alcheringa was held with limited participation and events pertaining to the ongoing COVID-19 crisis.