Pongal, also referred to as Thai Pongal, is a multi-day Hindu harvest festival celebrated by Tamils. It is observed in the month of Thai according to the Tamil solar calendar and usually falls on 14 or 15 January. It is dedicated to Surya and corresponds to Makar Sankranti, the Hindu observance celebrated under many regional names throughout the Indian subcontinent. The festival is celebrated over three or four days with Bhogi, Surya Pongal, Mattu Pongal and Kanum Pongal, observed on consecutive days.

A harvest festival is an annual celebration that occurs around the time of the main harvest of a given region. Given the differences in climate and crops around the world, harvest festivals can be found at various times at different places. Harvest festivals typically feature feasting, both family and public, with foods that are drawn from crops.