Aadi Perukku is celebrated for the birth of the Tamil month of Aadi. This is the beginning of all the festivals during the festival seasons. The Aadiperukku festival was celebrated with religious fervour in the towns of Mettur, Poolampatti etc situated on the banks of River Cauvery. During the month of Thai and Aadi the sun changes directions so it is celebrated Aadi Perukku festival celebrated in Tamilnaduin that way. The 18th day of Aadi is observed as ‘ Aadiperukku’, a day of offerings and prayers to the water bodies like rivers and lakes.