Constitution Day
Constitution day denotes:
- the Constitution Day of the United States ( 17th September 1787)
- Constitution Day (Iran) , National Day of Iran until 1979
- Constitution Day (Niue) , the national holiday of Niue
- Constitution Day (Spain) , the national holiday of Spain ( December 6th )
- Constitution Day (Norway) , the national holiday of Norway
- Constitution Day (Weimar Republic) , the national holiday of the Weimar Republic
- Constitution Day (Germany) , the anniversary of the entry into force of the Basic Law in the Federal Republic of Germany ( 23 May , also day of the Basic Law )