In Chiang Mai the celebration is known as Yee Peng (the full moon of the second month), as the twelfth month in the Thai Lunar Calendar corresponds to the second month in the traditional calendar of the old northern Lanna kingdom. The festival features beautifully illuminated lanterns, which are either carried, displayed in houses and temples, and even launched into the night sky. Krathong which are an offering – traditionally made out of a banana stalk and adorned with candles, incense and some money – are floated down the rivers.