Yi Peng (also written as Yee Peng) is a festival unique to northern Thailand and closely linked with the ancient Lanna kingdom. Adapted from Brahmin origins, Yi Peng was originally celebrated as an individual event in its own right marking the end of the rainy season and the start of winter (cool season), Yi Peng now takes place at the same time as Loy Krathong. Yi Peng events take place at various locations in northern Thailand, but it is Chiang Mai which has become synonymous with Yi Peng.