Making and eating Khichdi on Makar Sankranti has great importance in Hindu religion. For this reason, there is a tradition of making and eating Khichdi in every house on Makar Sankranti. Actually, on this day Khichdi is offered to the gods.
https://www.bhaktvatsal.com/festivals/makar-sankranti-par-khichdi-kyu-banti-hai
