Like many other Indian festivals, Pongal also has a few interesting legends attached to it signifying the importance it holds. The most popular legend is the one connected to the first day of the Pongal celebration when the Rain God, Bhogi or Indra is worshipped. According to the legend, on the this day Lord Krishna lifted the Govardhan Mountain on his little finger to shelter his people and save them from being washed away by the rains and floods.
Another legend is associated with the third day of Pongal celebration, also known as Mattu Pongal. According to it, Lord Shiva once asked Nandi, his bull, to go to earth and deliver his message to the people - to have an oil bath every day, and food once a month. But Nandi got it all mixed up when he delivered the message, and told the people Shiva asked them to have an oil bath once a month, and eat every day. Shiva was displeased, and told Nandi that since the people would now need to grow more grain, Nandi would have to remain on earth and help them plough the fields. Mattu Pongal is also called Kanu Pongal, and women pray for the welfare of their brothers. This is similar to the festivals of Raksha Bandhan and Bhai Dooj celebrated in some states of North India.