Vesākha or Vesak is a holy day. It is observed traditionally by Buddhists in Sri Lanka, Bangladesh, India, Nepal and the South East Asian countries of Singapore, Vietnam, Thailand, Cambodia, Laos, Malaysia, Burma, and Indonesia. Sometimes it is called "Buddha's Birthday". It is basically Buddha's birthday and actually includes the birth, enlightenment (nirvāna), and passing away (Parinirvāna) of Gautama Buddha.