The Ceremony of Tri-yampawai or the Swing Ceremony was one of the 12 royal ceremonies held in each of the months of the Thai lunar calendar in the Sukhothai kingdom. Originally held in the first lunar month, it was moved to the second lunar month in the early Rattanakosin period at the beginning of the 19th century. The ceremony was a Bhramin new year’s ceremony and lasted for 10 days.
According to an ancient Hindu epic, after Brahma created the world he sent Shiva to look after it. When Shiva descended to the earth, Naga serpents wrapped around the mountains in order to keep the earth in place. When Shiva found the earth solid, the Nagas moved to the seas in celebration. The Swing Ceremony is a re-enactment of this story. The pillars of the Giant Swing represent the mountains, while the circular base of the swing represents the earth and the seas. In the ceremony Brahmins swing, trying to grab a bag of coins placed on one of the pillars.