Phi Ta Khon sometimes known as Ghost Festival is the most common name for a group of festivals held in Dan Sai, nestled in the mountains of Loei province of northeastern Thailand. The events take place over three days sometime between March and July, the dates being selected annually by the town’s mediums. The date for this event changes each year, but it is always sometime between March and July. Although pinning down the dates of Phi Ta Khon was once an issue, with the village elders only naming the dates a few weeks beforehand, the festival is now fixed at the first weekend after the sixth full moon. The exact date is determined by two mediums (mor pii/หมอผี)