Swedish flag. See Basic Laws of Sweden. Switzerland, 12 September (1848). Adoption of the 1st Federal Constitution. See Swiss Federal Constitution. Not a public holiday. Taiwan, 25 December (1947). See Constitution of the Republic of China. Not a public holiday. Tajikistan, 6 November (1994) Thailand, 10 December (1932). Known locally as Wan Ratthathammanun. See Constitution of Thailand. Turks and Caicos Islands, 30 August (1976). Turkmenistan, 18 May (1992) Ukraine, 28 June (1996). See Constitution of Ukraine. United States, 17 September (1787). Known as Constitution Day. Not a public holiday. Uruguay, 18 July (1830). Known locally as Jura de la Constitución (de la República Oriental del Uruguay). See Constitution of Uruguay. Uzbekistan, 8 December (1992). Known locally as Konstitutsiya Kuni (in Uzbek). See Constitution of Uzbekistan. Vanuatu, 5 October (1979). See Constitution of Vanuatu. See also Fiestas Patrias – Homeland national holidays of Mexico Flag Day Independence Day National Day Pledge Across America Public holiday Republic Day References External links Constitution days Types of national holidays January observances February observances March observances May observances June observances July observances August observances September observances October observances November observances December observances Public holidays in Cambodia