The water Festival a spectacle to behold,is probably the most exorbitant festival held each year in November.It is usually celebrated for three days,i,e the 14th and 15thof the waxing moon and the 1st of the waning moon of the month of Kadek.The 15th of the waxing moon is the last full moon day.

The festival ushers in the fishing season, marks a change in the flow of the Tonle Sap and the ebbing-water season,and is seen as thansgiving to the Mekong River for providing the country with fertile land abundant fish.

At the height of the rainy season,the water of the mekong river forces the Tanle Sap to reverse its current and to flow up to the tonle Sap Lake as the water of the Mekong River begins to subside,the swollen Tonle Sap Lake flow back to the Mekong River through the Tonle Sap and empties into the sea,which leaves behind vast quantities of fish.This indeed is a remarkable phenomenon of the Tonle Sap.