佛誕
For countries using the lunisolar calendar, the date for Vesak or Buddha's Birthday varies from year to year in the Gregorian calendar, but usually falls in April or May; in leap years it may be celebrated in June. In Bhutan it is celebrated on the 15th day of the fourth month of the Bhutanese lunar calendar. In Thailand, Laos, Singapore and Indonesia, Vesak is celebrated on the fourteenth or fifteenth day of the fourth month in the Chinese lunar calendar. In China, Korea and Vietnam, Buddha's Birthday is celebrated on the eighth day of the fourth month in the Chinese lunar calendar. In Japan, Buddha's Birthday is observed on the same date but in the Gregorian calendar, i.e. 8 April.