Vesak

Vesākha or Vesak is a holy day. It is observed traditionally by Buddhists in Sri Lanka, Bangladesh, India, Nepal and the South East Asian countries of Singapore, Vietnam, Thailand, Cambodia, Laos, Malaysia, Burma, and Indonesia.^[1] Sometimes it is called "Buddha's Birthday". It is basically Buddha's birthday and actually includes the birth, enlightenment (nirvāna), and passing away (Parinirvāna) of Gautama Buddha.^[2]

Vesākha
Official name	Vesākha, Buddha Purnima, Vaishaka, Vesak
Also called	Buddha's Birthday or Buddha Day
Observed by	All Buddhist sects
Type	Religious
Significance	The birth, enlightenment and passing away of Buddha
Date	Full moon of the month of Vesākha, usually in May
Observances	Meditation, Observing the eight precepts, partaking of vegetarian food, giving to charity, "bathing" the Buddha
Related to	Buddha's Birthday

The exact date of Vesākha varies according to the lunar calendars used in different traditions. In Theravada countries following the Buddhist calendar, it falls on a full moon Uposatha day. This is typically in the 5th or 6th lunar month. Vesākha Day in China is on the eighth of the fourth month in the Chinese lunar calendar. The date varies from year to year in the Western Gregorian calendar. It usually falls in April or May. In leap years Vesākha is celebrated in June.