What is the first day of pongal known as?

The first day of Pongal is known as Bhogi Pongal. It is celebrated to honor Lord Indra, the god of rain, and marks the beginning of the harvest festival. On this day, people discard old belongings and celebrate new beginnings, often by lighting bonfires to dispose of waste and celebrating with family and friends. Traditional rituals and prayers are performed to seek blessings for prosperity and good harvests in the upcoming year.