This age-old festival is celebrated on the full-moon night of the twelfth lunar month when the River Ping becomes illuminated by thousands of flickering lights and lanterns. The traditional Loi Krathong song, sung only on such occasions, rings out across the whole area, bringing amusement and joy to young villagers who gladly join in the fun by dancing. This historic festival takes place each year on Loi Krathong Day, duly marked by the floating and lighting of Krathong Sai in Tak Province.