If you ever intend to go to the festival or know someone who is feel free to PIN THIS!
Yi (or Yee) Peng Festival is a religious festival held every year in Chiang Mai to show respect for Buddha. The date of the festival usually coincides with Loi Krathong in which candles are placed on floating flowers and go down the river. (We went to this as well, since it was the next day in Chiang Mai.)