The document discusses the Sky Lantern Festival in Thailand, also known as the Loi Krathong festival. It is held on the full moon of the 12th month in the traditional Thai lunar calendar, usually in November. People launch sky lanterns, which are small hot air balloons, to send prayers, wishes, or to float away bad luck and problems. Releasing sky lanterns is believed to bring good fortune. The festival originated as an ancient practice of honoring the river spirits by floating krathong, small rafts made of banana leaves and candles, down rivers.