Vesak, also known as ‘Buddha Purnima’ or ‘Buddha Day,’ is celebrated on the day of the full moon in the month of Vesakha according to the Asian lunar calendars. This observance typically falls in April or May in the Gregorian calendar.
On Vesak Day, Buddhists around the world commemorate events of significance to Buddhists of all traditions: the birth, enlightenment, first sermon, and the passing away of Gautama Buddha. Each of these events is believed to have occurred on the full moon.