KHANA usually closes its office on the Water Festival Days which falls in November so that staff can celebrates the annual three-day Water Festival. This year of 2014, the National Holiday falls on the 5th, 6th and 7th of November 2014.
KHANA volunteer team usually uses these days to organize campaigns to prevent drug abuse and HIV transmission prevention. The water festival become the most important holiday for Cambodians. The boat races on the Tonle Sap and the carnival atmosphere ashore attract millions of people from all over the country.
In 2012 the Government cancelled the Water Festival Celebration for Cambodians to express their sorrow and pay their respect for the late King Father.
In 2010 at least 349 people were killed and hundreds injured in a stampede in Cambodia that broke out while thousands were celebrating a water festival on an island in a river in Phnom Penh late on 22 November 2010. Then the water festival in 2011 was cancelled.
Every year peoples may see a smaller Water Festival being held around Angkor Wat and other areas in Cambodia; however, the real National Festival is held in Phnom Penh, Capital of the Kingdom of Cambodia. The annual Water Festival is called "Bonn Om Toeuk" in Khmer and it is held in coincidence with the Full Moon Festival which ushers in the fishing season.