Buddha Purnima is celebrated every year on the full moon day in the month of Baisakh as per the Hindu calendar. It is also known as Vesak or Buddha Jayanti and commemorates three major events in Buddha's life- his birth, attainment of enlightenment, and death. 

Prince Siddharta Gautama who later became Gautam Buddha was the founder of Buddhism. Buddha Purnima is a public holiday so schools and most businesses remain closed.