Thevar Jayanti is observed in the Indian state of Tamil Nadu every year on October 30. This annual event commemorates the birthday of U. Muthuramalingam Thevar, a prominent socialist and political figure in Tamil Nadu during the 20th century. The celebration is particularly significant for the Thevar community, also known as the Mukkulator, which comprises three social groups: the Agamudayar, the Kallar, and the Maravar. Although not an official holiday, many businesses and schools in southern Tamil Nadu remain closed for the day. The event includes memorial ceremonies held at Thevar's burial site, honoring his contributions and legacy. U. Muthuramalingam Thevar is revered as a spiritual figure within the community, and his life and work are celebrated during this observance.