Pongal is a multi-day Hindu harvest festival celebrated by Tamils. The festival is celebrated over three or four days with Bhogi, Thai Pongal, Mattu Pongal and Kaanum Pongal, beginning on the last day of the Tamil calendar month of Margazhi, and observed on consecutive days. Thai Pongal is observed on the first day of the Tamil calendar month of Thai and usually falls on 14 or 15 January in the Gregorian calendar.