Baishagu is the most cherished festival of the Bodo Kacharis of Assam and is celebrated in the Bodo inhabited areas of Kokrajhar, Bongaigaon, Nalbari, Darrang and Sonitpur districts. The Bodos celebrate it as a springtime festival at the advent of the New Year, which is during mid April.

Baishagu begins with worship of the cow. The next day, which synchronises with the first day of the month of Bohag of the Assamese calendar, the actual merriment begins. The supreme deity Bathou or Lord Shiva is worshipped during the festival by offering chicken and rice beer. 

The beautiful Bagurumba dance is an integral part of Baishagu. This is mainly a formation dance with slow steps and outstretched hands. About a score of girls dressed in most colourful attire perform this dance to the accompany- merit of Bodo traditional musical instruments. The traditional musical instruments that are used in this dance festival are Khum (Drum), Jotha (Manjari), Khawbang (Taal), Gogona (Mouth-organ) and Siphung (Flute) etc. It is also customary at the time of closure of the Baishagu festival to offer community prayers at a particular place called Garjasali.