Yi Peng Lantern Festival in Chiang Mai
Yi Peng is a Lanna festival of lights celebrated in Chiang Mai on the full moon of the second month of the northern Thai lunar calendar, usually November, best known for mass releases of glowing khom loi sky lanterns. It runs concurrently with the national Loy Krathong festival, giving Chiang Mai simultaneous sky lanterns and floating river candles.
Yi Peng takes its name from the Lanna lunar calendar: yi means two and peng refers to a full moon day, marking the full moon of the second month in the calendar once used by the old Lan Na Kingdom that ruled northern Thailand from around the 13th to 18th centuries.