loi krathong is a festival celebrated annually throughout Thailand and Loi Krathong takes place on the evening of the full moon of the 12th month in the traditional Thai lunar calendar. In the Western calendar this usually falls in November. The name could be translated as "to float a basket", and comes from the tradition of making krathong,which are then floated on a river.On the night of the full moon, Thais launch their krathong on a river, canal or a pond, making a wish as they do so. The festival may originate from an ancient ritual paying respect to the water spirits.