Lohri, celebrated annually on January 13 in North India, signifies the end of winter and the start of longer days as the Sun begins its northward journey. The festival, observed particularly in Punjab, Haryana, Himachal Pradesh, and Delhi, involves lighting bonfires, offering sesame seeds and jaggery, and communal singing and dancing. Traditions suggest Lohri marks a transition from cold to warmth and stagnation to growth, with various beliefs linking its origin to figures like Sant Kabir's wife or the word 'loh' for baking.