Boon Yi Peng is a great traditional Lanna tradition that has been practiced since the ancient times or lunar month of Lanna people on the twelfth lunar month of the central part of the late winter rainy season. The weather is clear, the sky is clear, the Lanna tradition is one, in addition to the Loy Krathong on the river, is a lighthouse lit up in the sky with the moon. Kim is believed to worship Katekaew Chulamani heaven or what was believed to be Loikhoh or exorcise. To be auspicious to life.