* बुद्ध पुर्णिमा/বুদ্ধ পূর্ণিমা Buddha Purnima or बुद्ध जयंती/বুদ্ধ জয়ন্তী Buddha Jayanti in India, Bangladesh and Nepal
* 花祭 (Hanamatsuri) in Japan,
* 석가 탄신일 Seokka Tanshin-il (Hanja: 釋迦誕身日) in Korean (Korea),
* 佛誕 (Mandarin: Fódàn, Cantonese: Fātdàahn) in Chinese-speaking communities in China, Singapore, Taiwan.
* Phật Đản in Vietnamese (Vietnam),
* ས་ག་ཟླ་བ། Saga Dawa (sa ga zla ba) in Tibetan (Tibet),
* (Kasone la-pyae Boda nei), lit. “Full Moon Day of Kason,” the second month of the traditional Burmese calendar (Burma)
* វិសាខបូជា Visak Bochéa in Khmer (Cambodia),
* ວິຊຂບູຊ Vixakha Bouxa in Laotian (Laos)
* วันวิสาขบูชา Visakah Puja, Vesakha Puja, or Visakha Bucha in Thai (Thailand),
* Waisak in Indonesia,
* වෙසක් පසළොස්වක පෝය Vesak / Wesak in Sri Lanka and Malaysia
Like Jesus’s birthday Buddha’s birthday is a matter of preference. One tradition is that the date is calculated from the lunar calendar. The method starts by finding the the first full moon day of the sixth month. Of course there are multiple lunar calendars to choose from. In China this is the fourth month except in years in which there’s an extra full moon. In those years, Buddha’s birthday falls in the seventh month unless it starts a week earlier
Vesak 2011 falls on Tuesday, 17 May 2011,