The story goes that when the Buddha was born, dragons flew down from heaven and poured fragrant water over the land, like a sweet rain, and all the flowers on land and water bloomed simultaneously. So on this day, statues of a young Buddha are decorated with flowers and carried to temples in procession, and children in Japan take turns pouring sweet tea over the Buddha's head. It is a day of gratitude.
In all East Asian countries, except Japan, beginning in1873, it is held on the 8th day of the 4th month in the Chinese Lunar Calendar, and the day is an official holiday in Hong Kong, Macau, and South Korea. The date varies from year to year in the Gregorian Calendar.