The festival of the Illminated Boat Procession or "Lai Reua Fai" in Thai and "Lai Heua Fai" in local dialect is an ancient tradition of northeastern people.

In the past, the festival was held in several provinces in this region, later only some provinces still proserve this tradition especially Nakhon Phanom Province where the annual event draws visitions from different directions. It has end of Buddhist Lent.