Vesak is the most sacred holy day of Theravada Buddhism. Also called Visakha Puja or Wesak, Vesak is an observation of the birth, enlightenment, and death (parinirvana) of the historical Buddha. For Theravada Buddhists, Vesak is a major holy day to be marked by a rededication to the dharma and the Eightfold Path. Vesak observances sometimes include the release of birds, insects, and caged wild animals to symbolize the liberation of enlightenment. In some places, the religious observances are also accompanied by impressive secular celebrations of parties, parades, and festivals. Temples and city streets may be decorated with countless lanterns. https://www.learnreligions.com/