1)

Vietnam:
Independence Day, 2 September (1945)

Virgin Islands:
Transfer Day (from Denmark to the US), 27 March
(1917)

Wallis and Futuna:
Bastille Day, 14 July (1789)

Yemen:
Unification Day, 22 May (1990)

Yugoslavia:
Republic Day, 29 November

Zambia:
Independence Day, 24 October (1964)

Zimbabwe:
Independence Day, 18 April (1980)

Taiwan:
Republic Day (Anniversary of the Chinese Revolution), 10
October (1911)

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@Nationality

Afghanistan:
noun: Afghan(s)

adjective: Afghan

Albania:
noun: Albanian(s)

adjective: Albanian

Algeria:
noun: Algerian(s)

adjective: Algerian

American Samoa:
noun: American Samoan(s)

adjective: American Samoan

Andorra:
noun: Andorran(s)

adjective: Andorran

Angola:
noun: Angolan(s)

adjective: Angolan

Anguilla:
noun: Anguillan(s)

adjective: Anguillan

Antigua and Barbuda:
noun: Antiguan(s), Barbudan(s)

adjective: Antiguan, Barbudan

Argentina:
noun: Argentine(s)

adjective: Argentine

Armenia:
noun: Armenian(s)

adjective: Armenian

Aruba:
noun: Aruban(s)

adjective: Aruban; Dutch

Australia:
noun: Australian(s)

adjective: Australian

Austria:
noun: Austrian(s)

adjective: Austrian

Azerbaijan:
noun: Azerbaijani(s)

adjective: Azerbaijani

Bahamas, The:
noun: Bahamian(s)

adjective: Bahamian

Bahrain:
noun: Bahraini(s)

adjective: Bahraini

Bangladesh:
noun: Bangladeshi(s)

adjective: Bangladeshi

Barbados:
noun: Barbadian(s) or Bajan (colloquial)

adjective: Barbadian or Bajan (colloquial)

Belarus:
noun: Belarusian(s)

adjective: Belarusian

Belgium:
noun: Belgian(s)

adjective: Belgian

Belize:
noun: Belizean(s)

adjective: Belizean

Benin:
noun: Beninese (singular and plural)

adjective: Beninese

Bermuda:
noun: Bermudian(s)

adjective: Bermudian

Bhutan:
noun: Bhutanese (singular and plural)

adjective: Bhutanese

Bolivia:
noun: Bolivian(s)

adjective: Bolivian

Bosnia and Herzegovina:
noun: Bosnian(s), Herzegovinian(s)

adjective: Bosnian, Herzegovinian

Botswana:
noun: Motswana (singular), Batswana (plural)

adjective: Motswana (singular), Batswana (plural)

Brazil:
noun: Brazilian(s)