This is a 3 day festival celebrated with a lot of enthusiasm in South India and specially in Andhra Pradesh. First day is known as Bhoghi where children gets blessings. Second day is main festival called Sankranthi and third day is Kanuma – this is festival for formers.
This is one festival where new couple generally celebrated together with both families. A month long before this festival, rongli is made in front of each house and a tour of village with Bhajans happen early in the morning.
More about Sankranthi from Wikipedia
Makar Sankranti is one of the few ancient Hindu festivals that has been observed according to solar cycles, while most festivals are set by the lunar cycle of the lunisolar Hindu calendar. Being a festival that celebrates the solar cycle, it almost always falls on the same Gregorian date every year (January 14), except in rare years when the date shifts by a day for that year, because of the complexity of earth-sun relative movement. The festivities associated with Makar Sankranti are known by various names such as Lohri by north Indian Hindus and Sikhs, Sukarat in central India, Bhogali Bihu by Assamese Hindus, and Pongal by Tamils and Makar Sankranti by others including in the states of Maharashtra, Andhra Pradesh and Karnataka,
Warm wishes to all my readers, friends and well wishers. Enjoy the festival.