Last modified: 2013-11-09 by rob raeside
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| Month | Country | Flag Event |
| Unknown | Sweden | First use as a battle flag - 1569 |
| Netherlands | First use of the flag - 1581 | |
| Sweden | Use as a naval flag 1620s | |
| Denmark | Flag adopted 1625 | |
| Netherlands | 1630-1660 - orange stripe becomes red | |
| Sweden | 1663 - warrant on use of flags at sea | |
| Russia | 1693 - First use as a naval ensign | |
| Denmark | Specifications on dimensions specified - 1748 | |
| United States | Two stars and two stripes added to flag in 1795 | |
| France | Colors standardized 1804 | |
| France | Colors standardized 1812 | |
| El Salvador | Flag adopted 1822 | |
| Peru | Flag adopted 1825 | |
| Poland | flag constituted by Polish parliament 1831 following November uprising (modeled on the flag of the Grand Duchy of Warsaw) | |
| Greece | Flag adopted 1832 | |
| Romania | Flag first authorized by Ottoman sultan 1834 | |
| Tunisia | Flag adopted 1835 | |
| El Salvador | Minor modifications to flag - 1841 | |
| Haiti | Flag current pattern adopted 1843 | |
| Turkey | flag in use since 1844 (ref: Ottoman Empire) | |
| Costa Rica | Flag adopted 1848 | |
| Hungary | Flag adopted during the 1848-49 uprising | |
| Hungary | First law about flag in Constitution - 1848 | |
| Haiti | flag reconfirmed - 1849 | |
| Hungary | Flag in disuse during Austrian period 1849-1867 | |
| Haiti | arms on flag changed - 1859 | |
| Romania | Horizontal version of the flag adopted 1859 | |
| Haiti | circa 1860 - blue-red bicolor in use | |
| Poland | 1863 - 1831 flag with arms used during Polish revolt | |
| Andorra | Adopted 1866 | |
| Romania | Vertical version of the flag adopted 1866 | |
| Hungary | Flag restored 1867 | |
| Venezuela | Minor modification 1867 | |
| Panama | Provisionally approved 1904 | |
| Albania | Flag Adopted 1912 modeled on the flag of Iskander Bey | |
| Taiwan | Flag adopted as naval ensign - 1914 | |
| Armenia | Adopted 1918; disuse during Soviet era | |
| Azerbaijan | Adopted 1918; disuse during Soviet era | |
| Lithuania | Flag adopted 1918 (in disuse during Soviet era) | |
| Albania | Flag changed with a redesigned double headed eagle - 1920 | |
| Panama | Flag officially approved 1925 | |
| Nepal | First Nepali flag adopted 1928 | |
| Afghanistan | Current pattern (Black-Red-Green vertical bars) adopted between September 1928 and January 1929 | |
| Afghanistan | 1929 - Black-Red-Green motif restored after period of disuse | |
| Venezuela | Star pattern redesigned 1930 | |
| Bahrain | Serrated flag adopted 1933 | |
| Albania | Color of flag background changed - 1934 | |
| Mongolia | Flag adopted 1940 (socialist version) | |
| Albania | Postwar flag adopted - 1944 | |
| Faroe Islands | Flag recognized by Denmark - 1948 | |
| Romania | Arms of People's Republic of Romania added to flag 1948 | |
| Hungary | Ráskosi arms on flag - 1949-1956 | |
| Hungary | Constitution modified regarding flag - 1949 | |
| Korea, Republic of | Defacto use of the flag, 1950 (from older flag) | |
| Puerto Rico | Flag adopted for use by Commonwealth 1952 | |
| Romania | New arms of People's Republic of Romania added to flag 1952 | |
| Venezuela | Venezuelan flag law passed 1954 regulating flag | |
| British Virgin Islands | Flag adopted - 1956 | |
| Morocco | Flag adopted by decree - 1956 | |
| Hungary | Basic flag restored 1957 | |
| Netherlands | Colors defined - 1958 | |
| Nigeria | Flag selected (pre-independence) 1959 | |
| Guam | Red border added around flag 1960 | |
| Trinidad and Tobago | Flag adopted 1962 | |
| Syria | Reverted to original pattern with three green stars 1963 (following coup d'état | |
| Bhutan | Flag adopted 1969 | |
| Afghanistan | circa 1973 - flag modified to eliminate Arabic numerals; replaced and in disuse as of 9 May 1974 | |
| East Timor | Self-proclaimed independence flag 1975 | |
| Norfolk Island | 1980 - Official approval by Australian Governor-General and Queen Elizabeth II | |
| Poland | 1980 - Minor modification to flag (People's Republic of Poland) | |
| Syria | previous flag readopted 1980 | |
| Northern Mariana Islands | Design modified 1985 | |
| Paraguay | ratio changed 1988 | |
| Northern Mariana Islands | Modified 1991 | |
| Paraguay | Apparent change to flag circa 1991 | |
| Åland Islands | proportions standardized - 1992 | |
| Turkmenistan | Flag adopted 1992 | |
| Czech Republic | Flag adopted 1993, using the former flag of Czechoslovakia, originated on 30 March 1920 | |
| Hungary | Flag legislated regarding use - 1995 | |
| Puerto Rico | Colors standardized - 1995 | |
| Zambia | Flag specifications changed 1996 | |
| British Virgin Islands | Size of badge modified - 1999 | |
| Cayman Islands | Badge modified on flag 1999 | |
| Turks and Caicos | Badge modified in 1999 | |
| Hungary | Ratio set for flag and pole sizes 2000 | |
| Cocos (Keeling) Islands | Flag adopted 2003 (unofficial) | |
| January | United Kingdom | Flag adopted 1 January 1801 adding "St. Patrick's Cross" to the flag of the United Kingdom of England and Scotland |
| Mexico | Flag decreed in December 1880 becomes effective 1 January 1881 | |
| Mexico | New emblem placed on flag 1 January 1889 | |
| Italy | Official date of flag use - 1 January 1948 | |
| Syria | Federation of Arab Republics formed, stars replaced by golden Quraish eagle | |
| Norfolk Island | Flag adopted 1 January 1980 | |
| Palau | Flag adopted 1 January 1981 | |
| Netherland Antilles | Adopted 1 January 1986 | |
| Myanmar | Flag adopted 3 January 1974 | |
| Afghanistan | Black-Red-Green motif restored 4 January 2004 | |
| Seychelles | Flag legislated 8 January 1996 | |
| Honduras | Flag adopted 9 January 1866 | |
| Mauritius | Flag adopted 9 January 1968 | |
| Bangladesh | Adopted 13 January 1972 | |
| Iraq | Takbir added to flag 13 January 1963 | |
| Georgia | Flag adopted 14 January 2004 | |
| Norfolk Island | Flag official 17 January 1980 | |
| Russia | Adopted as Merchant ensign 20 January 1705 (disuse during Soviet era) | |
| Lesotho | Flag adopted 20 January 1987 | |
| Belgium | Adopted 23 January 1831 | |
| Turkmenistan | design modified 24 January 2001 | |
| Korea, Republic of | Flag adopted 25 January 1950 | |
| Montserrat | Badge modified on flag 25 January 1999 | |
| Christmas Island | Official adoption of flag 26 January 2006 | |
| Belgium | Flag reconfirmed - 28 January 1936 | |
| Ukraine | Flag adopted 28 January 1992 | |
| Turkmenistan | Olive branch added to flag 29 January 1997 | |
| Nauru | Flag adopted 21 January 1968 | |
| February | Belize | Flag adopted 2 February 1950 from the design of People's Unity Party |
| Belgium | Order of colors specified by Minister of Navy - 4 February 1831 | |
| Bosnia and Herzegovina | Adopted 4 February 1998 | |
| Mexico | New emblem placed on flag 5 February 1934 | |
| Azerbaijan | Readopted, 5 February 1991 | |
| Ethiopia | Flag adopted 6 February 1996 | |
| Grenada | Flag adopted 7 February 1974 | |
| Mexico | Flag reconfirmed 8 February 1984 | |
| Sri Lanka | Flag legislated in constitution 8 February 2000 | |
| Guam | Flag accepted by Guam congress 9 February 1948 | |
| Poland | New law on the Polish flag - 9 February 1990 | |
| Finland | Colors slightly modified - 12 February 1920 | |
| Mongolia | Socialist star removed 12 February 1992 | |
| South Georgia and the South Sandwich Islands | Coat of arms introduced 14 February 1992 | |
| Bahrain | Flag serrations modified 14 February 2002 | |
| France | Flag adopted 15 February 1794 | |
| Canada | Flag proclaimed by Queen Elizabeth II, 15 February 1965 | |
| Hong Kong | Flag adopted (pre-transfer) - 16 February 1990 | |
| Haiti | Flag restored 17 February 1986 | |
| Gambia | Flag adopted and hoisted 18 February 1965 | |
| Vanuatu | Flag adopted 18 February 1980 | |
| Slovakia | Specifications issued 18 February 1993 | |
| Congo, Democratic Republic of | New symbols and arms legislated 16 February 2006 | |
| Netherlands | Colors regulated by royal decree and official adoption of flag - 19 February 1937 | |
| Venezuela | Codification of flag 19 February 1954 ???? | |
| Australia | 20 February 1903 - Flag approval announced by King Edward VII | |
| Korea, Republic of | Change to ying-yang symbols on flag, 21 February 1984 | |
| Macao | Flag adopted 31 March 1993 | |
| Syria | Flag of United Arab Republic (Syria and Egypt) adopted 22 February 1958 | |
| Saint Lucia | Flag adopted 22 February 1979 (in use since 1 March 1967) | |
| Poland | Effective date of legislation - 22 February 1990 | |
| Estonia | Flag adopted 24 February 1918, in disuse during Soviet era | |
| Samoa | Flag adopted 24 February 1949 | |
| Antigua and Barbuda | Adopted 27 February 1997 | |
| Western Sahara | Flag adopted 27 February 1976 | |
| Latvia | Flag readopted 27 February 1990 | |
| Ghana | Flag readopted 28 February 1966 | |
| March | Mali | Flag approved 1 March 1961 |
| Kyrgyzstan | Flag Adopted 3 March 1992 | |
| Congo, Democratic Republic of | New flag of D.R. Congo first hoisted - 4 March 2006 | |
| Ghana | Flag adopted 6 March 1957, in disuse 1964-66 | |
| Venezuela | Law changing flag and arms passed 9 March 2006 | |
| Morocco | Flag described in constitution - 10 March 1974 | |
| Haiti | Cap of Liberty restored to flag in constitution dated 10 March 1987 | |
| Venezuela | Publication of law and arms legislation 10 March 2006 | |
| Venezuela | New 8-star national flag first hoisted 12 March 2006 | |
| Aruba | Official specifications published - 14 March 1977 | |
| Saudi Arabia | Flag adopted 15 March 1973 | |
| South Africa | Flag design selected 15 March 1994 | |
| Aruba | Flag adopted 16 March 1976 | |
| Aruba | Flag first hoisted - 18 March 1976 | |
| South Africa | Specification issued 18 March 1994 | |
| Lithuania | Readopted, 20 March 1989 | |
| Namibia | Flag adopted 21 March 1990 | |
| East Timor | Flag confirmed and colors redefined in constitution 22 March 2002 | |
| Philippines | Specifications issued 25 March 1936 | |
| Venezuela | Minor modification adding coat of arms to the flag - 28 March 1905 | |
| Panama | Flag ratified 28 March 1941 | |
| Haiti | Constitution officially ratified 29 March 1987 | |
| Peru | Civil flag confirmed 31 March 1950 | |
| Northern Mariana Islands | Adopted as a district flag 31 March 1972 | |
| April | Mauritania | Flag adopted 1 April 1959 |
| Pitcairn | Flag approved by Queen Elizabeth II on 2 April 1984 (based on 1980 design) | |
| Albania | Socialist star added to flag - 1946 | |
| Åland Islands | Flag first hoisted - 3 April 1954 | |
| Monaco | Flag adopted 4 April 1881 | |
| Northern Mariana Islands | Adopted as territorial flag 4 July 1976 | |
| San Marino | Flag adopted 6 April 1862 | |
| Albania | 1920 flag readopted - 7 April 1992 | |
| Montserrat | Flag adopted 10 April 1909 | |
| Togo | Flag adopted 11 April 1960 | |
| Tuvalu | reverted to 1977 flag 11 April 1997 | |
| French Polynesia | Flag use regulated 12 April 1996 (autonomous region flag) | |
| Albania | Flag changed by occupying Italian government - 13 April 1939 | |
| Mexico | Flag modified by Republican government 14 April 1823 | |
| Australia | flag confirmed in legislation - 14 April 1954 | |
| Christmas Island | Flag unofficially adopted 14 April 1986 | |
| Bulgaria | Flag adopted 16 April 1897 | |
| Jordan | Flag adopted 16 April 1928 | |
| Tuvalu | flag legislated 17 April 1997 | |
| Zimbabwe | Flag adopted 18 April 1980 | |
| South Africa | Flag proclamation issued in government gazette | |
| American Samoa | Flag changed 27 April 1960 | |
| Sierra Leone | Flag adopted 27 April 1961 | |
| Austria | Legislated 27 April 1984, flag dates to 1230 | |
| Moldova | Flag adopted 27 April 1990 | |
| El Salvador | Flag replaced 28 April 1865 | |
| May | Pitcairn | First hoisted May 1984 |
| Denmark | Proportions set - 1 May 1893 | |
| Mozambique | Flag adopted 1 May 1983 | |
| South Africa | Flag adopted in Constitution | |
| Russia | Adopted as Civil ensign 7 May 1883 (disuse during Soviet era) | |
| Germany | Flag adopted 9 May 1949 | |
| Brazil | Four stars added to flag 11 May 1992 | |
| Cayman Islands | Flag adopted 14 May 1958 | |
| El Salvador | 1821 flag reinstated - 17 May 1912 | |
| Virgin Islands | Flag adopted 17 May 1921 | |
| Congo, Democratic Republic of | Flag adopted 17 May 1997 | |
| Philippines | Flag adopted 19 May 1898 (use prohibited until 1919) | |
| Cuba | Flag adopted 20 May 1902, from a revolutionary flag dating from 1850 | |
| Sudan | Flag adopted 20 May 1970 | |
| Cameroon | Flag adopted 20 May 1975 | |
| Yemen | Flag adopted 20 May 1990 | |
| East Timor | First hoisting 20 May 2002 | |
| Niger | Flag specified in constitution, 22 May 1995 | |
| Guyana | Flag adopted 26 May 1966 | |
| Finland | Colors standardized - 26 May 1978 | |
| South Africa | Flag first hoisted 27 April 1994 | |
| Brazil | Star added to flag 28 May 1968 | |
| Finland | Flag adopted 29 May 1918 | |
| Anguilla | Adopted 30 May 1990; First hoisted 30 May 1990 | |
| June | Brazil | Star added to flag June 1960 |
| Tunisia | flag legislated 1 June 1959 | |
| Albania | Italian occupying flag formalized in constitution - 3 June 1939 | |
| Liechtenstein | Crown modified 3 June 1957 | |
| Kazakhstan | Flag adopted 4 June 1992 | |
| Turkey | Flag adopted 5 June 1936 | |
| Faroe Islands | Change of shade of blue - 5 June 1959 | |
| Norfolk Island | Flag selected 6 June 1979 (unofficial) | |
| Belarus | Flag adopted 7 June 1995 | |
| Vatican City (Holy See) | Flag adopted 8 June 1929 (based on Catholic Church flag of 1825) | |
| New Zealand | Flag legislated as National flag - 12 June 1902 | |
| Marshall Islands | Flag adopted 12 June 1979 | |
| United States | Flag adopted 14 June 1777 | |
| Iceland | Change in the specification for the blue color 17 June 1944 | |
| Seychelles | Effective date of legislation 17 June 1996 | |
| Mexico | Arms on flag modified 18 June 1864 | |
| Iceland | Flag approved by royal decree 19 June 1915 for Marine purposes | |
| Italy | Flag adopted 19 June 1946 (originally the flag of the Cisalpine Republic | |
| Greenland | Flag adopted 21 June 1985 | |
| Sweden | Officially readopted 22 June 1906 | |
| Marshall Islands | Flag approved by High Commissioner 22 June 1979 | |
| Luxembourg | Flag adopted 23 June 1972 (first hoisted circa 1845-1848) | |
| Liechtenstein | Flag adopted 24 June 1937 (crown added to older version) | |
| Haiti | new constitution changes flag - 25 June 1964, in disuse until 1987 | |
| Djibouti | Flag adopted 27 June 1977 | |
| Slovenia | Flag adopted 27 June 1991 | |
| Burundi | Adopted 28 June 1967 | |
| Iraq | Flag modified 28 June 2004 | |
| Portugal | Flag adopted 30 June 1911 | |
| Tanzania | Flag adopted 30 June 1964 | |
| Liechtenstein | Crown modified 30 June 1982 | |
| July | Papua New Guinea | Flag adopted 1 July 1971 (pre-independence) |
| Hong Kong | Flag officially hoisted 1 July 1997 | |
| Algeria | Flag adopted 3 July 1962 - originally a pre-revolutionary flag | |
| United States | Five stars added and number of stripes returned to 13 - 4 July 1818 | |
| United States | One star added to flag 4 July 1819 | |
| United States | Two stars added to flag 4 July 1820 | |
| United States | One star added to flag 4 July 1822 | |
| United States | One star added to flag 4 July 1836 | |
| United States | One star added to flag 4 July 1836 | |
| United States | One star added to flag 4 July 1845 | |
| United States | One star added to flag 4 July 1846 | |
| United States | One star added to flag 4 July 1847 | |
| United States | One star added to flag 4 July 1848 | |
| United States | One star added to flag 4 July 1851 | |
| United States | One star added to flag 4 July 1858 | |
| United States | One star added to flag 4 July 1859 | |
| United States | One star added to flag 4 July 1861 | |
| United States | One star added to flag 4 July 1863 | |
| United States | One star added to flag 4 July 1865 | |
| United States | One star added to flag 4 July 1867 | |
| United States | One star added to flag 4 July 1877 | |
| United States | Five stars added to flag 4 July 1890 | |
| United States | One star added to flag 4 July 1891 | |
| United States | One star added to flag 4 July 1896 | |
| United States | One star added to flag 4 July 1908 | |
| United States | Two stars added to flag 4 July 1912 | |
| Guam | Flag adopted 4 July 1917 | |
| United States | One star added to flag 4 July 1959 | |
| United States | One star added to flag 4 July 1960 | |
| Malawi | Flag adopted 6 July 1964 | |
| Venezuela | Flag pattern adopted 9 July 1863 with seven stars | |
| Qatar | Flag adopted 9 July 1971 | |
| Bahamas | Flag adopted 10 July 1973 | |
| Uruguay | Flag adopted 11 July 1830 | |
| Kiribati | Flag adopted 12 July 1979 | |
| Montenegro | Flag adopted 12 July 2004 | |
| Venezuela | First hoisting of Venezuelan flag 14 July 1811 | |
| Bolivia | Flag reconfirmed 14 July 1888 | |
| Hungary | Decree specifies flag sizes for governmental use - 14 July 2000 | |
| Venezuela | Flag adopted as official flag 15 July 1811 | |
| Venezuela | Flag adopted 15 July 1930 | |
| Montenegro | Flag first hoisted 15 July 2004 | |
| Norway | Flag adopted - July 21, 1821 (unofficial) | |
| Hungary | Flag replaced by Hungarian Soviet Republic flag | |
| India | Flag adopted 22 July 1947 | |
| Maldives | Flag adopted 25 July 1965 | |
| Liberia | Flag created 26 July 1847 | |
| Iran | Flag adopted 29 July 1980 | |
| Hungary | Flag restored circa 31 July 1919 | |
| Iraq | Flag adopted 31 July 1963 | |
| August | Poland | 1831 flag used as the flag of the Second Republic - 1 August 1919 |
| Benin | Flag readopted 1 August 1990 | |
| Albania | Kingdom of Albania approved a modified flag to include Skanderbeg's Helmet - 3 August 1929 | |
| Cook Islands | Flag adopted 4 August 1979 | |
| Burkino Faso | Flag adopted 4 August 1984 | |
| Albania | New flag proposal submitted to King Zog - 5 August 1929 | |
| Jamaica | Flag adopted 6 August 1962 | |
| Estonia | Flag reinstated 7 August 1990 | |
| Albania | Kingdom of Albania flags formally adopted - 8 August 1929 | |
| Gabon | Flag adopted 09 August 1960 | |
| Niger | Flag recodified in constitution, 9 August 1999 | |
| Hong Kong | Approval of flag by Hong Kong SAR preparatory committee 10 August 1996 | |
| Guatemala | Flag adopted 12 August 1871 | |
| Japan | Flag adopted 13 August 1999 (in use since 17th century) | |
| Pakistan | Flag adopted 14 August 1947 | |
| Paraguay | First Paraguayan tribar adopted 15 August 1812 | |
| Cyprus | Flag adopted 16 August 1960 | |
| Luxembourg | Adoption official on 16 August 1972 | |
| Serbia | Flag adopted 17 August 2004 | |
| Congo | Flag adopted 18 August 1958, in disuse 1969-1991 | |
| Senegal | Flag adopted 20 June 1960 | |
| Romania | New arms of People's Republic of Romania added to flag 21 August 1965 | |
| Equatorial Guinea | Flag adopted 21 August 1979 | |
| Russia | Officially adopted as state flag 21 August 1991 | |
| Nicaragua | Specifications on size and shade of blue issued 23 August 1971 | |
| Armenia | Reconfirmed by Supreme Council 23 August 1990 | |
| Liberia | First hoisted 24 August 1847 | |
| Armenia | Adopted by Supreme Council 24 August 1990 | |
| Angola | 27 August 2003 - New flag adopted, not yet ratified | |
| September | Slovakia | Flag adopted 1 September 1992 |
| Lithuania | Proportions changed 1 September 2004 | |
| Australia | First hoisted, 3 September 1901 | |
| Slovakia | First hoisted 3 September 1992 | |
| Ukraine | use reconfirmed 3 September 1998 | |
| Nicaragua | Flag adopted 4 September 1908 | |
| Morocco | Flag described in constitution - 4 September 1992 | |
| Kuwait | Flag adopted 7 September 1961 | |
| Sri Lanka | Flag adopted 7 September 1978, incorporating thee flag of Kandy, dating back to 1815, and national flag of 1948 | |
| Korea, Democratic Peoples Republic of | Flag adopted 8 September 1948 | |
| Guatemala | Flag colors and size standardized 12 September 1968 | |
| El Salvador | Flag reaffirmed in legislation - 14 September 1972 | |
| Mexico | New representation of arms on flag 15 September 1917 | |
| Malaysia | Flag adopted 16 September 1963 | |
| Indonesia | Flag hoisted 17 August 1945 | |
| Mexico | Flag revised 17 September 1968 | |
| Haiti | flag dimensions specified 18 September 1949 | |
| Italy | Colors standardized 18 September 2002 | |
| Saint Kitts and Nevis | Flag adopted 19 September 1983 | |
| Malta | Flag adopted 21 September 1964 | |
| Cambodia | Flag readopted 21 September 1993 | |
| Cape Verde | Flag adopted 22 September 1992 | |
| Guinea Bissau | Flag adopted 24 September 1973 | |
| Ecuador | Flag adopted 26 September 1860 | |
| Guatemala | Colors standardized 26 September 1997 | |
| Burundi | Proportions changed 27 September 1982 | |
| Lesotho | New flag adopted 27 September 2006 (National Flag Act) | |
| Thailand | Flag adopted 28 September 1917 | |
| Albania | Royal decree (Italian) approving flag - 28 September 1939 | |
| Syria | United Arab Republic dissolved 28 September 1961, flag in disuse | |
| Brunei | Flag adopted 29 September 1959 | |
| Botswana | Flag adopted 30 September 1996 | |
| October | Chile | Flag adopted 1 October 1949 |
| China | Flag adopted 1 October 1949 | |
| Nigeria | Flag officially adopted 1 October 1960 | |
| Tuvalu | Flag adopted at independence 1 October 1978 | |
| Tuvalu | Flag changed to add additional star - 1 October 1995 | |
| Lesotho | New flag hoisted - 3 October 2006 | |
| Bermuda | Flag adopted 4 October 1910 | |
| Egypt | Flag adopted 4 October 1984 | |
| Saint Helena | Flag adopted 4 October 1984 | |
| Macedonia, Former Yugoslav Republic of | Flag approved 5 October 1995 | |
| Swaziland | Flag adopted 6 October 1968 | |
| Mexico | Flag adopted 7 October 1821 | |
| Taiwan | Naval ensign adopted as national flag - 8 October 1928 | |
| Uganda | Flag adopted 9 October 1962 | |
| Congo | Flag readopted 10 October 1991 | |
| Somalia | Flag adopted 12 October 1954 | |
| Niue | Flag adopted 15 October 1975 | |
| Oman | Change in width of stripes and proportions 18 October 1995 | |
| Tristan da Cunha | Flag adopted 20 October 2002 | |
| Madagascar | Flag adopted 21 October 1958 | |
| Costa Rica | Change to number of stars - 12 October 1964 | |
| Saint Vincent and the Grenadines | Flag adopted 21 October 1985 | |
| Canada | Flag adopted 22 October 1964 | |
| New Zealand | 23 October 1869 - Flag proclaimed as colonial ensign | |
| Zambia | Flag adopted 24 October 1964 | |
| Rwanda | Flag adopted 25 October 2001 | |
| Israel | Flag adopted 28 October 1948 | |
| Cambodia | Flag adopted 29 October 1948 (in disuse 1970-1993) | |
| Philippines | Flag sanction lifted by US - 30 October 1919 | |
| Bolivia | Flag adopted 31 October 1851 | |
| November | Dominica | Flag adopted 3 November 1978 |
| Dominica | Modifications to disk - 3 November 1981 | |
| Dominica | Fimbriations eliminated around stars 3 November 1990 | |
| Tonga | Flag adopted 4 November 1875 | |
| São Tomé and Principe | Flag adopted 5 November 1975 | |
| Dominican Republic | Flag adopted 6 November 1844 | |
| Chad | Flag adopted 6 November 1959 | |
| Turks and Caicos | Flag adopted 7 November 1968 | |
| British Indian Ocean Territory | Flag adopted 8 November 1990 | |
| Guinea | Flag adopted 10 November 1958 | |
| Angola | Adopted 11 November 1975 | |
| British Virgin Islands | Scroll added to flag - 15 November 1960 | |
| Benin | Flag adopted 16 November 1959, in disuse 1975-1990 | |
| Morocco | French protectorate of Morocco flag officialized - 17 November 1915 | |
| Latvia | Adopted 18 November 1918 (flag dates from 1279, in disuse during Soviet era) | |
| Solomon Islands | Flag adopted 18 November 1977 | |
| Uzbekistan | Flag adopted 18 November 1991 | |
| Brazil | Adopted 19 November 1889 | |
| Libya | Flag adopted 19 November 1977 | |
| Macao | Officially hoisted at transfer 19 November 1999 | |
| Romania | Flag established in Romanian constitution 21 November 1991 | |
| Niger | Flag adopted 23 November 1959 | |
| French Polynesia | Flag adopted 23 November 1984 | |
| Kuwait | Flag first hoisted, 24 November 1961 | |
| Tajikistan | Flag adopted 25 November 1992 | |
| Paraguay | Flag with arms in center codified 25 November 1842 | |
| Suriname | Flag adopted 25 November 1975 | |
| Columbia | Flag adopted 26 November 1861 | |
| Iceland | Flag approved for national use 30 November 1918 | |
| Vietnam | Flag adopted 30 November 1955 | |
| Federated States of Micronesia | Flag adopted 30 November 1978 as the flag of the Pacific Island Trust Territory | |
| Barbados | Adopted 30 November 1996 | |
| December | Afghanistan | Black-Red-Green motif restored December 1992 - in disuse during Taliban era |
| Tuvalu | Flag changed in December 1995 and original pattern goes into disuse | |
| Central African Republic | Flag adopted 1 December 1958 | |
| Laos | Flag adopted 2 December 1975 | |
| Singapore | Flag adopted 3 December 1959 | |
| Côte d'Ivoire | Flag adopted 4 December 1959 | |
| Eritrea | Flag adopted 5 December 1995 | |
| Bulgaria | arms of People's Republic added to flag - 6 December 1947 | |
| Lebanon | Flag adopted 7 December 1943 | |
| Romania | Effective date of Romanian Constitution 8 December 1991 | |
| Mexico | recodification of flag law in revised decrees on national symbols - 8 December 2005 | |
| Norway | Flag legislated on 10 December 1898 | |
| Switzerland | Flag adopted 12 December 1889, although some forms were in use unoffically since the 15th century | |
| Kenya | Flag adopted 12 December 1963 | |
| India | New law regarding respect for the national flag - 12 December 2005 | |
| Norway | Flag legislation published 15 December 2 1898 | |
| Norway | legislation becomes effective 15 December 1899 | |
| Nepal | Emblems on flag streamlined 16 December 1962 | |
| Oman | Flag adopted 17 December 1970 | |
| Australia | Addition of seventh point to Commonwealth star announced 19 December 1908 | |
| Spain | Flag adopted 19 December 1981 | |
| Congo, Democratic Republic of | Constitutional referendum (18-19 Dec. 2005) passed - planned return to flag of 1963-66 (implementation date unknown) | |
| Mexico | Arms on flag modified 20 December 1880 by proclamation | |
| Panama | Flag first hoisted 20 December 1903 | |
| United Arab Emirates | Adopted 21 December 1971 | |
| Croatia | Flag adopted 21 December 1990 | |
| Puerto Rico | Flag adopted 22 December 1895 (use forbidden until 1952) | |
| Greece | Colors standardized 22 December 1978 | |
| Comoros | Flag prescribed in new constitution - 23 December 2001 | |
| Russia | Reuse following dissolution of Soviet Union - 26 December 1991 | |
| Romania | Arms removed from flag 27 December 1989 | |
| Bulgaria | 1897 flag readopted 17 December 1990 | |
| Ireland | Use confirmed 29 December 1937 | |
| Faroe Islands | Blue color standardized - 29 December 1998 | |
| Comoros | New flag hoisted - 31 December 2001 |