The word comes from ‘budhi’, ‘to awaken’. It has its origins about 2,500 years ago when Siddhartha Gotama, known as the Buddha, was himself awakened (enlightened) at the age of 35.
The birthday of the historical Buddha is celebrated on different dates by various schools of Buddhism. In most of Asia it is observed on the first full moon date of the fourth month in the Chinese lunar calendar (typically May). But in other parts of Asia the day falls a month or more either earlier or later.
Photo Abraham Menashe