Buddha’s birthday is a Buddhist festival that celebrated in most of the East Asia commemorating the birth of the Prince Siddhartha Gautama, later the Gautama Buddha and was founder of the Buddhism. In South and Southeast Asia it is celebrated as Vesak, which places greater emphasis on the enlightenment and death of the Buddha. According to the Theravada Tripitaka scriptures, Gautama Buddha was born c. 563–480 BCE in Lumbini (current in Nepal), and raised in the Shakya capital of Kapilavastu ,Nepal.
The exact date of Buddha’s birthday is based on the Asian lunisolar calendars. The date for the celebration of Buddha’s birthday varies from year to year in the Western Gregorian calendar, but usually falls in April or May. In leap years it may be celebrated in June.