Time zone history by country
154 countries and territories have a clock record of their own in the tz database. 93 more have kept the same clocks as a neighbour since 1970, so the database stores them as another name for that record; they are listed here with the record they follow.
| Country or territory | Standard time | Clock changes today | Record |
|---|---|---|---|
| Afghanistan | UTC+4:30 | no | own record |
| Albania | UTC+1 | yes | own record |
| Algeria | UTC+1 | no | own record |
| American Samoa | UTC−11 | no | own record |
| Andorra | UTC+1 | yes | own record |
| Angola | UTC+1 | no | follows Nigeria |
| Anguilla | UTC−4 | no | follows Puerto Rico |
| Antarctica | UTC−3 to UTC+12 | in 2 of 10 zones | 7 zones |
| Antigua and Barbuda | UTC−4 | no | follows Puerto Rico |
| Argentina | UTC−3 | no | 12 zones |
| Armenia | UTC+4 | no | own record |
| Aruba | UTC−4 | no | follows Puerto Rico |
| Australia | UTC+8 to UTC+10:30 | in 7 of 12 zones | 12 zones |
| Austria | UTC+1 | yes | own record |
| Azerbaijan | UTC+4 | no | own record |
| Bahamas | UTC−5 | yes | follows Toronto (Canada) |
| Bahrain | UTC+3 | no | follows Qatar |
| Bangladesh | UTC+6 | no | own record |
| Barbados | UTC−4 | no | own record |
| Belarus | UTC+3 | no | own record |
| Belgium | UTC+1 | yes | own record |
| Belize | UTC−6 | no | own record |
| Benin | UTC+1 | no | follows Nigeria |
| Bermuda | UTC−4 | yes | own record |
| Bhutan | UTC+6 | no | own record |
| Bolivia | UTC−4 | no | own record |
| Bosnia and Herzegovina | UTC+1 | yes | follows Serbia |
| Botswana | UTC+2 | no | follows Mozambique |
| Brazil | UTC−5 to UTC−2 | no | 16 zones |
| British Indian Ocean Territory | UTC+6 | no | own record |
| British Virgin Islands | UTC−4 | no | follows Puerto Rico |
| Brunei | UTC+8 | no | follows Malaysia |
| Bulgaria | UTC+2 | yes | own record |
| Burkina Faso | UTC+0 | no | follows Côte d’Ivoire |
| Burundi | UTC+2 | no | follows Mozambique |
| Cambodia | UTC+7 | no | follows Thailand |
| Cameroon | UTC+1 | no | follows Nigeria |
| Canada | UTC−7 to UTC−3:30 | in 10 of 23 zones | 20 zones |
| Cape Verde | UTC−1 | no | own record |
| Caribbean Netherlands | UTC−4 | no | follows Puerto Rico |
| Cayman Islands | UTC−5 | no | follows Panama |
| Central African Republic | UTC+1 | no | follows Nigeria |
| Chad | UTC+1 | no | own record |
| Chile | UTC−6 to UTC−3 | in 2 of 4 zones | 4 zones |
| China | UTC+6 to UTC+8 | no | 2 zones |
| Christmas Island | UTC+7 | no | follows Thailand |
| Cocos (Keeling) Islands | UTC+6:30 | no | follows Myanmar |
| Colombia | UTC−5 | no | own record |
| Comoros | UTC+3 | no | follows Kenya |
| Cook Islands | UTC−10 | no | own record |
| Costa Rica | UTC−6 | no | own record |
| Croatia | UTC+1 | yes | follows Serbia |
| Cuba | UTC−5 | yes | own record |
| Curaçao | UTC−4 | no | follows Puerto Rico |
| Cyprus | UTC+2 | yes | 2 zones |
| Czech Republic | UTC+1 | yes | own record |
| Côte d’Ivoire | UTC+0 | no | own record |
| Democratic Republic of the Congo | UTC+1 to UTC+2 | no | follows Nigeria |
| Denmark | UTC+1 | yes | follows Germany |
| Djibouti | UTC+3 | no | follows Kenya |
| Dominica | UTC−4 | no | follows Puerto Rico |
| Dominican Republic | UTC−4 | no | own record |
| East Timor | UTC+9 | no | own record |
| Ecuador | UTC−6 to UTC−5 | no | 2 zones |
| Egypt | UTC+2 | yes | own record |
| El Salvador | UTC−6 | no | own record |
| Equatorial Guinea | UTC+1 | no | follows Nigeria |
| Eritrea | UTC+3 | no | follows Kenya |
| Estonia | UTC+2 | yes | own record |
| Eswatini | UTC+2 | no | follows South Africa |
| Ethiopia | UTC+3 | no | follows Kenya |
| Falkland Islands | UTC−3 | no | own record |
| Faroe Islands | UTC+0 | yes | own record |
| Fiji | UTC+12 | no | own record |
| Finland | UTC+2 | yes | own record |
| France | UTC+1 | yes | own record |
| French Guiana | UTC−3 | no | own record |
| French Polynesia | UTC−10 to UTC−9 | no | 3 zones |
| French Southern Territories | UTC+5 | no | follows Maldives |
| Gabon | UTC+1 | no | follows Nigeria |
| Gambia | UTC+0 | no | follows Côte d’Ivoire |
| Georgia | UTC+4 | no | own record |
| Germany | UTC+1 | yes | own record |
| Ghana | UTC+0 | no | follows Côte d’Ivoire |
| Gibraltar | UTC+1 | yes | own record |
| Greece | UTC+2 | yes | own record |
| Greenland | UTC−4 to UTC+0 | in 3 of 4 zones | 4 zones |
| Grenada | UTC−4 | no | follows Puerto Rico |
| Guadeloupe | UTC−4 | no | follows Puerto Rico |
| Guam | UTC+10 | no | own record |
| Guatemala | UTC−6 | no | own record |
| Guernsey | UTC+0 | yes | follows United Kingdom |
| Guinea | UTC+0 | no | follows Côte d’Ivoire |
| Guinea-Bissau | UTC+0 | no | own record |
| Guyana | UTC−4 | no | own record |
| Haiti | UTC−5 | yes | own record |
| Honduras | UTC−6 | no | own record |
| Hong Kong | UTC+8 | no | own record |
| Hungary | UTC+1 | yes | own record |
| Iceland | UTC+0 | no | follows Côte d’Ivoire |
| India | UTC+5:30 | no | own record |
| Indonesia | UTC+7 to UTC+9 | no | 4 zones |
| Iran | UTC+3:30 | no | own record |
| Iraq | UTC+3 | no | own record |
| Ireland | UTC+1 | yes | own record |
| Isle of Man | UTC+0 | yes | follows United Kingdom |
| Israel | UTC+2 | yes | own record |
| Italy | UTC+1 | yes | own record |
| Jamaica | UTC−5 | no | own record |
| Japan | UTC+9 | no | own record |
| Jersey | UTC+0 | yes | follows United Kingdom |
| Jordan | UTC+3 | no | own record |
| Kazakhstan | UTC+5 | no | 7 zones |
| Kenya | UTC+3 | no | own record |
| Kiribati | UTC+12 to UTC+14 | no | 3 zones |
| Kuwait | UTC+3 | no | follows Saudi Arabia |
| Kyrgyzstan | UTC+6 | no | own record |
| Laos | UTC+7 | no | follows Thailand |
| Latvia | UTC+2 | yes | own record |
| Lebanon | UTC+2 | yes | own record |
| Lesotho | UTC+2 | no | follows South Africa |
| Liberia | UTC+0 | no | own record |
| Libya | UTC+2 | no | own record |
| Liechtenstein | UTC+1 | yes | follows Switzerland |
| Lithuania | UTC+2 | yes | own record |
| Luxembourg | UTC+1 | yes | follows Belgium |
| Macau | UTC+8 | no | own record |
| Madagascar | UTC+3 | no | follows Kenya |
| Malawi | UTC+2 | no | follows Mozambique |
| Malaysia | UTC+8 | no | own record |
| Maldives | UTC+5 | no | own record |
| Mali | UTC+0 | no | follows Côte d’Ivoire |
| Malta | UTC+1 | yes | own record |
| Marshall Islands | UTC+12 | no | own record |
| Martinique | UTC−4 | no | own record |
| Mauritania | UTC+0 | no | follows Côte d’Ivoire |
| Mauritius | UTC+4 | no | own record |
| Mayotte | UTC+3 | no | follows Kenya |
| Mexico | UTC−8 to UTC−5 | in 4 of 12 zones | 12 zones |
| Micronesia | UTC+10 to UTC+11 | no | own record |
| Moldova | UTC+2 | yes | own record |
| Monaco | UTC+1 | yes | follows France |
| Mongolia | UTC+7 to UTC+8 | no | 2 zones |
| Montenegro | UTC+1 | yes | follows Serbia |
| Montserrat | UTC−4 | no | follows Puerto Rico |
| Morocco | UTC+0 | no | own record |
| Mozambique | UTC+2 | no | own record |
| Myanmar | UTC+6:30 | no | own record |
| Namibia | UTC+2 | no | own record |
| Nauru | UTC+12 | no | own record |
| Nepal | UTC+5:45 | no | own record |
| Netherlands | UTC+1 | yes | follows Belgium |
| New Caledonia | UTC+11 | no | own record |
| New Zealand | UTC+12 to UTC+12:45 | yes | 2 zones |
| Nicaragua | UTC−6 | no | own record |
| Niger | UTC+1 | no | follows Nigeria |
| Nigeria | UTC+1 | no | own record |
| Niue | UTC−11 | no | own record |
| Norfolk Island | UTC+11 | yes | own record |
| North Korea | UTC+9 | no | own record |
| North Macedonia | UTC+1 | yes | follows Serbia |
| Northern Mariana Islands | UTC+10 | no | follows Guam |
| Norway | UTC+1 | yes | follows Germany |
| Oman | UTC+4 | no | follows United Arab Emirates |
| Pakistan | UTC+5 | no | own record |
| Palau | UTC+9 | no | own record |
| Palestine | UTC+2 | yes | 2 zones |
| Panama | UTC−5 | no | own record |
| Papua New Guinea | UTC+10 to UTC+11 | no | 2 zones |
| Paraguay | UTC−3 | no | own record |
| Peru | UTC−5 | no | own record |
| Philippines | UTC+8 | no | own record |
| Pitcairn Islands | UTC−8 | no | own record |
| Poland | UTC+1 | yes | own record |
| Portugal | UTC−1 to UTC+0 | yes | 3 zones |
| Puerto Rico | UTC−4 | no | own record |
| Qatar | UTC+3 | no | own record |
| Republic of the Congo | UTC+1 | no | follows Nigeria |
| Romania | UTC+2 | yes | own record |
| Russia | UTC+2 to UTC+12 | no | 26 zones |
| Rwanda | UTC+2 | no | follows Mozambique |
| Réunion | UTC+4 | no | follows United Arab Emirates |
| Saint Barthélemy | UTC−4 | no | follows Puerto Rico |
| Saint Helena | UTC+0 | no | follows Côte d’Ivoire |
| Saint Kitts and Nevis | UTC−4 | no | follows Puerto Rico |
| Saint Lucia | UTC−4 | no | follows Puerto Rico |
| Saint Martin (French part) | UTC−4 | no | follows Puerto Rico |
| Saint Pierre and Miquelon | UTC−3 | yes | own record |
| Saint Vincent and the Grenadines | UTC−4 | no | follows Puerto Rico |
| Samoa | UTC+13 | no | own record |
| San Marino | UTC+1 | yes | follows Italy |
| Saudi Arabia | UTC+3 | no | own record |
| Senegal | UTC+0 | no | follows Côte d’Ivoire |
| Serbia | UTC+1 | yes | own record |
| Seychelles | UTC+4 | no | follows United Arab Emirates |
| Sierra Leone | UTC+0 | no | follows Côte d’Ivoire |
| Singapore | UTC+8 | no | own record |
| Sint Maarten | UTC−4 | no | follows Puerto Rico |
| Slovakia | UTC+1 | yes | follows Czech Republic |
| Slovenia | UTC+1 | yes | follows Serbia |
| Solomon Islands | UTC+11 | no | own record |
| Somalia | UTC+3 | no | follows Kenya |
| South Africa | UTC+2 | no | own record |
| South Georgia and the South Sandwich Islands | UTC−2 | no | own record |
| South Korea | UTC+9 | no | own record |
| South Sudan | UTC+2 | no | own record |
| Spain | UTC+0 to UTC+1 | yes | 3 zones |
| Sri Lanka | UTC+5:30 | no | own record |
| Sudan | UTC+2 | no | own record |
| Suriname | UTC−3 | no | own record |
| Svalbard and Jan Mayen | UTC+1 | yes | follows Germany |
| Sweden | UTC+1 | yes | follows Germany |
| Switzerland | UTC+1 | yes | own record |
| Syria | UTC+3 | no | own record |
| São Tomé and Príncipe | UTC+0 | no | own record |
| Taiwan | UTC+8 | no | own record |
| Tajikistan | UTC+5 | no | own record |
| Tanzania | UTC+3 | no | follows Kenya |
| Thailand | UTC+7 | no | own record |
| Togo | UTC+0 | no | follows Côte d’Ivoire |
| Tokelau | UTC+13 | no | own record |
| Tonga | UTC+13 | no | own record |
| Trinidad and Tobago | UTC−4 | no | follows Puerto Rico |
| Tunisia | UTC+1 | no | own record |
| Turkey | UTC+3 | no | own record |
| Turkmenistan | UTC+5 | no | own record |
| Turks and Caicos Islands | UTC−5 | yes | own record |
| Tuvalu | UTC+12 | no | follows Tarawa (Kiribati) |
| US Minor Outlying Islands | UTC−11 to UTC+12 | no | follows American Samoa |
| US Virgin Islands | UTC−4 | no | follows Puerto Rico |
| Uganda | UTC+3 | no | follows Kenya |
| Ukraine | UTC+2 to UTC+3 | in 1 of 2 zones | 2 zones |
| United Arab Emirates | UTC+4 | no | own record |
| United Kingdom | UTC+0 | yes | own record |
| United States | UTC−10 to UTC−5 | in 27 of 29 zones | 29 zones |
| Uruguay | UTC−3 | no | own record |
| Uzbekistan | UTC+5 | no | 2 zones |
| Vanuatu | UTC+11 | no | own record |
| Vatican City | UTC+1 | yes | follows Italy |
| Venezuela | UTC−4 | no | own record |
| Vietnam | UTC+7 | no | own record |
| Wallis and Futuna | UTC+12 | no | follows Tarawa (Kiribati) |
| Western Sahara | UTC+0 | no | own record |
| Yemen | UTC+3 | no | follows Saudi Arabia |
| Zambia | UTC+2 | no | follows Mozambique |
| Zimbabwe | UTC+2 | no | follows Mozambique |
| Åland Islands | UTC+2 | yes | follows Finland |