"A variety of stories are told of Surya, which have implications for observance of this day(s). The sun god, for example, had a number of children, among them the Lord Shani, one the nine primary celestial beings in Hindu astrology; Shani is identified with planet Saturn. When Shanti was born, it is said, an eclipse of the sun occurred. It is also said that Surya and Shani have their differences, but always on Makara Sankranthi, Surya visits with Shani- thus fathers should visit their sons. Food, especially sweets, will be prepared using til sesame seed oil), which is valued for its stickiness or binding quality. Thus, the sweets that people will give those close to them are a symbol of being bound together, whatever differences might arise."
January 1, 1970
https://en.wikiquote.org/wiki/Makar_Sankranti