Yi Peng Lantern Festival, celebrated in Thailand, is an annual event that takes place on the full moon of the 12th month of the traditional Thai lunar calendar, which usually falls in November. The festival is characterized by the floating of lighted lanterns called khom loi, which are made of rice paper and bamboo and are often decorated with intricate designs and messages.
The festival has its roots in the ancient animist beliefs of the Lanna people, who believed that the floating lanterns would carry their wishes and prayers to the heavens. Today, the festival is a popular tourist attraction and a major cultural event in Thailand, with people from all over the world coming to witness the spectacle of thousands of lanterns floating in the night sky.