Vat Purnima (वट पूर्णिमा, vaṭapūrṇimā, also called Vat Savitri Vrat) is a Hindu celebration observed by married women in Nepal, North India and in the Western Indian states of Maharashtra, Goa, Kumaon, Gujarat. On this Purnima (full moon) during the three days of the month of Jyeshtha in the Hindu calendar (which falls in May–June in the Gregorian calendar), a married woman marks her love for her husband by tying a ceremonial thread around a banyan tree. The celebration is based on the legend of Savitri and Satyavan as narrated in the epic Mahabharata.