| Country | National holiday |
| Hong Kong | National Day (Anniversary of the Founding of the People's Republic of China), 1 October (1949); note - 1 July 1997 is celebrated as Hong Kong Special Administrative Region Establishment Day |
| Hungary | Saint Stephen's Day, 20 August; note - commemorates the date when his remains were transferred to Buda (now Budapest) |
| Iceland | Independence Day, 17 June (1944) |
| India | Republic Day, 26 January (1950) |
| Indian Ocean | void |
| Indonesia | Independence Day, 17 August (1945) |
| Iran | Republic Day, 1 April (1979) |
| Iraq | Republic Day, July 14 (1958); note - the Government of Iraq has yet to declare an official national holiday but still observes Republic Day |
| Ireland | Saint Patrick's Day, 17 March |
| Isle of Man | Tynwald Day, 5 July |
| Israel | Independence Day, 14 May (1948); note - Israel declared independence on 14 May 1948, but the Jewish calendar is lunar and the holiday may occur in April or May |
| Italy | Republic Day, 2 June (1946) |
| Jamaica | Independence Day, 6 August (1962) |
| Jan Mayen | void |
| Japan | Birthday of Emperor AKIHITO, 23 December (1933) |
| Jersey | Liberation Day, 9 May (1945) |
| Jordan | Independence Day, 25 May (1946) |
| Kazakhstan | Independence Day, 16 December (1991) |
| Kenya | Independence Day, 12 December (1963); Madaraka Day, 1 June; Mashujaa Day, 20 October |
| Kiribati | Independence Day, 12 July (1979) |
| Korea, North | Founding of the Democratic People's Republic of Korea (DPRK), 9 September (1948) |
| Korea, South | Liberation Day, 15 August (1945) |
| Kosovo | Independence Day, 17 February (2008) |
| Kuwait | National Day, 25 February (1950) |