Belgian National Day

Belgian National Day
Celebrations for National Day in Brussels in 1856
Observed by	Belgium and Belgians
Significance	Anniversary of King Leopold I's oath of allegiance to the Constitution and investiture as first King of the Belgians in 1831
Date	21 July
Frequency	Annual
Related to	Belgian independence Belgian constitution and Belgian monarchy

Belgian National Day (Dutch: Nationale feestdag van België; French: Fête nationale belge; German: Belgischer Nationalfeiertag) is the national holiday of Belgium commemorated annually on 21 July. It is one of the country's ten public holidays and marks the anniversary of the investiture of Leopold I as the first King of the Belgians in 1831.