Vat Savitri Vrat is a Hindu fast where married women pray for their husband’s long life by worshipping the banyan tree. Rooted in the Mahabharata’s story of Savitri and Satyavan, the tradition blends faith, ritual, and symbolism. Observed on Jyeshtha Amavasya in many regions and as Vat Purnima elsewhere, it includes fasting, tying sacred threads, and reciting the katha.