
The festival marks the adoption of presiding deity, Andal, by Periyazhwar after he found her near a Tulsi plant in the garden of Vadabadrasai Temple at Thiruvilliputhur on the eighth day of the Tamil month of Adi.

After early morning special pujas, the presiding deities, Shri Rengamannar and Goddess Andal are taken in decorated palanquins to the car. Festivals Thousands of people from the state participate in the 'Aadi Pooram' festival celebrated in the Andal Temple. In many places in India, particularly in, Andal is treated more than a saint and as a form of god herself and a shrine for Andal is dedicated in most Vishnu temples.

Adopted by her father, Periyalvar, Andal avoided earthly marriage, the normal and expected path for women of her culture, to marry Vishnu, both spiritually and physically. Andal is known for her unwavering devotion to Lord, the God of the Gods.
