The ceremony is believed to have originated in thetime of king ramaknamhaeng of sukhothai,the first capital of thailand, and to have been started by nang nophamas or tao sri cholalak,the brahman consort of the king. She was the first person who in tro duced "krathongcherm", the banana leaf krathong in the form of lotus blossom on the festival night. The festival start in the evening when there is a full moon in the sky.