Vat Savitri Vrat Mei Kya Khaye Kya Nahi: Vat Savitri fast is of great importance in Hinduism. The fast of Vat Savitri falls on the new moon of Krishna Paksha of Jeshtha month. This year Vat Savitri's fast will be observed on 30th May. On this day, married women keep a fast for the long life of their husbands. Banyan tree has great importance on the day of Vat Savitri fast. On this day, the banyan tree is worshiped by married women by law. According to the scriptures, worshiping the banyan tree brings long life, happiness, prosperity and unbroken good fortune.