Constitution Day is observed in Norway on May 17, celebrating the signing of the Norwegian Constitution in 1814, which declared Norway's independence. The day is marked by children's parades, a tradition that began in Oslo in 1864, where initially only boys participated, with girls joining in 1899. Unlike many countries that feature military parades, Norway's celebrations focus on these children's parades, although military parades do occur, including one by the Royal Guard on Oslo's main street. The holiday also honors the Norwegian Royal Family following the dissolution of the union with Sweden. Constitution Day is an official flag flying day, with state and government agencies required to display the national flag, and civilians are encouraged to do the same.