It is a ceremony that is usually held on the night of the full moon of the 12th lunar month or the 15th day of the waxing moon of the 12th lunar month, which is the full moon day and the time when the water is full. Flowers, incense, candles or objects are placed in various shapes that do not sink, such as krathongs, boats, rafts, lotus flowers, etc., and then floated down the river. There are various purposes and beliefs, not only in Thailand. In China, India, Cambodia, Laos and Burma, there is also a Loi Krathong festival similar to ours. The differences are probably in the details, rituals and beliefs of each locality. Loi Krathong is an ancient tradition, but there is no clear evidence of when it was practiced. It only varies from locality to locality. In addition, Loi Krathong also has other purposes. In some places, it is to express gratitude to the Goddess of the River, which is a source of water for humans to use in various ways, as well as to ask for forgiveness for throwing waste into it. In some areas, it is done to remember deceased ancestors or to ward off misfortune and float away suffering and illness. Most people also pray for what they wish for.