The Vesak celebrates the birth, enlightenment and Parinirvana of the historical Buddha. In these days all over the world especially in Asia is celebrated Vesak also known as the Buddha Purnima Day, informally called Buddha's birthday, actually commemorates the birth, enlightenment and death of Gautama Buddha.
The exact date of Vesak is based on the Asian lunisolar calendar and is celebrated mainly in Vaisakha, month of the Buddhist calendar, hence the name of Vesak. In fact, the festival is observed on different days in Nepal, Sri Lanka, Tibet, Bangladesh, Bhutan, India, and the countries of the South Asian -East Singapore, Vietnam, Thailand, Cambodia, Laos, Malaysia, Myanmar and Indonesia, and in other places around the world.
The Vesakha day, devotees are encouraged to go to the temples before dawn to sing hymns of praise. Devotees may bring simple offerings such as flowers, candles and incense. These symbolic offerings serve to remind themselves to the followers that just as the beautiful flowers are destined to disappear and burn like candles and incense, because life is subject to decay and destruction.
Moreover, in these days, are released birds, insects and animals bred in captivity, in what is known as a symbolic act of liberation.