Mahamaham is a yearly celebration that is held once in twelfth years when the planet Guru or Jupiter enters Simha or Leo sign. It is praised at Mahamaham tank. A large number of individuals accumulate at Kumbakonamto have a dunk in the tank, alongside holy people and scholars. It is trusted that every one of the waterways of India are accepted to meet at the tank on this day and a purificatory shower at this tank on this day is equivalent to the joined plunges in all the sacred streams of India.
Celebration gods from every one of the sanctuaries in Kumbakonam touch base at the tank. At twelve every one of the divinities bathe alongside the lovers called "Theerthai". The sanctuary autos of significant sanctuaries in Kumbakonam come around the city on the celebration night. Mahamaham washing celebration is focused on a solitary day. The Tank is situated in the core of Kumbakonam town that covers a region of 6.2 sections of land and is trapezoidal fit as a fiddle. The tank is encompassed by 16 little Mandapams and has 21 wells inside the tank.