On Vesākha Day, Buddhists all over the world commemorate events of significance to Buddhists of all traditions: The birth, enlightenment and the passing away of Gautama Buddha.
As Buddhism spread from India it was assimilated into many foreign cultures, and consequently Vesākha is celebrated in many different ways all over the world.
Celebrating Vesākha also means making special efforts to bring happiness to the unfortunate like the aged, the handicapped and the sick. To this day, Buddhists will distribute gifts in cash and kind to various charitable homes throughout the country. Vesākha is also a time for great joy and happiness, expressed not by pandering to one’s appetites but by concentrating on useful activities such as decorating and illuminating temples, painting and creating exquisite scenes from the life of the Buddha for public dissemination. Devout Buddhists also vie with one another to provide refreshments and vegetarian food to followers who visit the temple to pay homage to the Enlightened One.
Credit to Wikipedia