Asian lunisolar calendar decides the exact date of Buddha Purnima. The date in the Gregorian calendar varies year to year. According to Gregorian calendar it is observed in April or May, but it may be observed in June in case of a leap year. Happy Buddha Purnima 2022 Greetings: Vesak Day Images, HD Wallpapers, WhatsApp Messages, SMS, Wishes and Quotes for Gautam Buddha’s Birthday and Festival.