word | | National holiday |
| UK | Brunei | National Day, 23 February (1984); note - 1 January 1984 was the date of independence from the UK, 23 February 1984 was the date of independence from British protection |
| UK | Gibraltar | National Day, 10 September (1967); note - day of the national referendum to decide whether to remain with the UK or go with Spain |
| UK | United Kingdom | the UK does not celebrate one particular national holiday |
| Ukraine | Ukraine | Independence Day, 24 August (1991); note - 22 January 1918, the day Ukraine first declared its independence (from Soviet Russia) and the day the short-lived Western and Central Ukrainian republics united (1919), is now celebrated as Unity Day |
| Ukrainian | Ukraine | Independence Day, 24 August (1991); note - 22 January 1918, the day Ukraine first declared its independence (from Soviet Russia) and the day the short-lived Western and Central Ukrainian republics united (1919), is now celebrated as Unity Day |
| UN | Samoa | Independence Day Celebration, 1 June (1962); note - 1 January 1962 is the date of independence from the New Zealand-administered UN trusteeship; it is observed in June |
| Unification | Saudi Arabia | Unification of the Kingdom, 23 September (1932) |
| Unification-Day | Romania | Unification Day (of Romania and Transylvania), 1 December (1918) |
| Unification-Day | Yemen | Unification Day, 22 May (1990) |
| Union | Belarus | Independence Day, 3 July (1944); note - 3 July 1944 was the date Minsk was liberated from German troops, 25 August 1991 was the date of independence from the Soviet Union |
| Union | Estonia | Independence Day, 24 February (1918); note - 24 February 1918 was the date Estonia declared its independence from Soviet Russia; 20 August 1991 was the date it declared its independence from the Soviet Union |
| Union | Georgia | Independence Day, 26 May (1918); note - 26 May 1918 was the date of independence from Soviet Russia, 9 April 1991 was the date of independence from the Soviet Union |
| Union | Latvia | ... note - 18 November 1918 was the date Latvia declared itself independent from Soviet Russia; 4 May 1990 is when it declared the renewal of independence; 21 August 1991 was the date of |
| Union | Lithuania | Independence Day, 16 February (1918); note - 16 February 1918 was the date Lithuania declared its independence from Soviet Russia and established its statehood; 11 March 1990 was the date it declared its independence from the Soviet Union |
| Union-Day | Burma | Independence Day, 4 January (1948); Union Day, 12 February (1947) |
| Union-Day | Tanzania | Union Day (Tanganyika and Zanzibar), 26 April (1964) |
| Union-wide | European Union | Europe Day 9 May (1950); note - a Union-wide holiday, the day that Robert SCHUMAN proposed the creation of the European Coal and Steel Community to achieve an organized Europe |
| united | Ukraine | Independence Day, 24 August (1991); note - 22 January 1918, the day Ukraine first declared its independence (from Soviet Russia) and the day the short-lived Western and Central Ukrainian republics united (1919), is now celebrated as Unity Day |
| Unity-Day | Germany | Unity Day, 3 October (1990) |
| Unity-Day | Ukraine | Independence Day, 24 August (1991); note - 22 January 1918, the day Ukraine first declared its independence (from Soviet Russia) and the day the short-lived Western and Central Ukrainian republics united (1919), is now celebrated as Unity Day |
| Uprising-Day | Macedonia | Ilinden Uprising Day, 2 August (1903); note - also known as Saint Elijah's Day |
| US | Philippines | Independence Day, 12 June (1898); note - 12 June 1898 was date of declaration of independence from Spain; 4 July 1946 was date of independence from US |
| US | Puerto Rico | US Independence Day, 4 July (1776); Puerto Rico Constitution Day, 25 July (1952) |
| US | Virgin Islands | Transfer Day (from Denmark to the US), 27 March (1917) |
| VI | Morocco | Throne Day (accession of King MOHAMED VI to the throne), 30 July (1999) |
| Victory-Day | Bangladesh | Independence Day, 26 March (1971); note - 26 March 1971 is the date of independence from West Pakistan, 16 December 1971 is Victory Day and commemorates the official creation of the state of Bangladesh |