Answer: Tamil Nadu
Notes: In Tamil Nadu, the Aadi Perukku festival is celebrated with traditional gaiety to pay tribute to water's life-sustaining properties. The festival, also known as 'Aadi 18', is celebrated on the 18th of Aadi month in Tamil calendar year to express gratitude to water bodies especially Cauvery river. The 18th day of Aadi is usually August 2, is observed as 'Aadi pirappu', a day of offerings and prayers to these rivers. The day is an occasion for rejoicing particularly for those living on the banks of the all the main rivers, its branches and tributaries.
