National Day in Laos is celebrated on December 2. This public holiday commemorates the establishment of the Lao People’s Democratic Republic in 1975.
The Kingdom of Laos was officially proclaimed in 1947 during the First Indochina War. It gained full independence as a constitutional monarchy in 1953. The establishment of the country’s independence was immediately followed by a civil war between the Royal Lao Government and the Pathet Lao, a communist political movement.

Source: https://anydayguide.com/calendar/1584