What was the date on which Goga novmi is clabrited on yera 1981?

Goga Novmi, a festival celebrated in some regions of India, falls on the 11th day of the month of Bhadrapada in the Hindu calendar. In the year 1981, Goga Novmi was celebrated on September 27. The festival honors the folk deity Goga, who is revered for his association with snakes and agriculture.