Independence:
1 August 1291 (founding of the Swiss Confederation)
National holiday:
Founding of the Swiss Confederation, 1 August (1291)
Constitution:
revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
Legal system:
civil law system influenced by customary law; judicial review of legislative acts, except with respect to federal decrees of general obligatory character; accepts compulsory ICJ jurisdiction with reservations
Suffrage:
18 years of age; universal