What is Vesak day, wesak day or Buddha Purnia
The exact date of Vesakha varies according to the various lunar calendars used in different traditions. In Theravada countries following the Buddhist calendar, it falls on a full moon Uposatha day, typically in the 5th or 6th lunar month. Vesakha Day in China and Korea is on the eighth of the fourth month in the Chinese lunar calendar. The date varies from year to year in the Western Gregorian calendar, but usually falls in April or May. In leap years Vesakha is celebrated in June.
Vesakha Pali;Sanskrit: Vaisakha, Devanagari: वैशाख, Wesak or Vesak, also known as Buddha Purnia, is a holy day observed traditionally by Buddhists in Nepal, Sri Lanka, Tibet, Bangladesh, Bhutan, India and the South East Asian countries of Singapore, Vietnam, Thailand, Cambodia, Laos, Malaysia, Myanmar, the Philippines, and Indonesia. Sometimes informally called “Buddha’s Birthday”, it actually commemorates the birth, enlightenment (nirvana), and death (Parinirvana) of Gautama Buddha.
The name of the observance is derived from the Pali term vesakha or Sanskrit vaisakha, which is the name of the lunar month falling in April – May (see Vaisakha).In Mahayana Buddhist traditions, the holiday is known by its Sanskrit name (Vaisakha) and derived variants of it.
Local renditions of the name vary by language, including:
Nepali: Buddha Purnima (बुद्ध पुर्णिमा), Budhha Jayanti (बुद्ध जयन्ति)
Bengali: Buddho Purnima (বুদ্ধ পূর্ণিমা), Buddho Joyonti (বুদ্ধ জয়ন্তী) or Bhesak (ভেসাক)
Sinhala: Vesak (වෙසක්) Full Moon Poya Day
Burmese: Kason Full Moon Day
Chinese: Fó Dàn (佛誕), Yù Fó Jié (浴佛節), Wèi Sai Jié (衛塞節) or Fat Dàahn
Filipino: Araw Ni Buddha
Indonesian: Hari Waisak
Japanese: Hanamatsuri (花祭)
Khmer: Visak Puja (or Visak Bochea) (វិសាខបូជា)
Korean: Seokka Tanshin-il (석가 탄신일, 釋迦誕身日)
Laotian: Vixakha Bouxa (ວິສາຂບູຊາ)
Malaysian: Hari Wesak
Tibetan: Saga Dawa (*ས་ག་ཟླ་བ། )
Thai: Wisakha Bucha (วิสาขบูชา)
Vietnamese: Phật Đản