Time zones are imaginary vertical bands that wrap around the Earth, marking the distance (in 1 hour increments) from the international reference meridian. This distance determines the local time of day in each time zone. Time zones compensate for the Earth's rotation, enabling sunrise and sunset to occur at approximately the same time of day no matter where on Earth one is located.
For example, if sunrise occurs at 6:00 am in London, England, it will also happen at around 6:00 am in New York, USA, even though the sunrise in New York happens five hours later (when it is 11:00 am in London) because New York is five time zones away. Because Earth rotates 360° every 23 hours, 56 minutes and 4.09053 seconds,, enabling the equation 360°/24 hours to determine time zone width, each time zone is approximately 15° of longitude wide.
World Time Zones by Country*
Observed world time zones by country or territory are listed in the table below. Many countries touch multiple time zones due to their sheer size and/or because they have overseas territories such as Denmark's territory Greeland. Daylight Saving Time (DST), which shifts local time by an hour in order to maximize daylight hours during certain times of year, is widely used in Europe, North America, and some parts of Africa, Australia, and South America. A few countries also use "winter time", a nearly identical time-shifting system, to the same effect.
*For full details, see the larger data table below the article text.
| Country | # of Time Zones | Time Zones | Daylight Savings/Winter Time? |
|---|---|---|---|
| Afghanistan | 1 | UTC +04:30 | no |
| Albania | 1 | UTC +01:00 | yes |
| Algeria | 1 | UTC +01:00 | no |
| Andorra | 1 | UTC +01:00 | no |
| Angola | 1 | UTC+01:00 | no |
| Antarctica | 9 | UTC −03:00, ±00:00, +03:00, +05:00 to +07:00, +10:00 to +12:00 | no |
| Antigua and Barbuda | 1 | UTC −04:00 | no |
| Argentina | 1 | UTC −03:00 | no |
| Armenia | 1 | UTC +04:00 | no |
| Australia | 9 | UTC +05:00, +06:30, +07:00, +08:00, +08:45, +09:30, +10:00, +10:30, +11:00 | yes |
| Austria | 1 | UTC +01:00 | yes |
| Azerbaijan | 1 | UTC +04:00 | no |
| Bahamas | 1 | UTC −05:00 | yes |
| Bahrain | 1 | UTC +03:00 | no |
| Bangladesh | 1 | UTC +06:00 | no |
| Barbados | 1 | UTC −04:00 | no |
| Belarus | 1 | UTC +03:00 | no |
| Belgium | 1 | UTC +01:00 | yes |
| Belize | 1 | UTC −06:00 | no |
| Benin | 1 | UTC +01:00 | no |
| Bhutan | 1 | UTC +06:00 | no |
| Bolivia | 1 | UTC −04:00 | no |
| Bosnia and Herzegovina | 1 | UTC +01:00 | yes |
| Botswana | 1 | UTC +02:00 | no |
| Brazil | 4 | UTC −05:00 to −02:00 | no |
| Brunei | 1 | UTC +08:00 | no |
| Bulgaria | 1 | UTC +02:00 | no |
| Burkina Faso | 1 | UTC ±00:00 | no |
| Burundi | 1 | UTC +02:00 | no |
| Cambodia | 1 | UTC +07:00 | no |
| Cameroon | 1 | UTC +01:00 | no |
| Canada | 5.5 | UTC −08:00 to UTC −03:30 | yes |
| Cape Verde | 1 | UTC −01:00 | no |
| Central African Republic | 1 | UTC +01:00 | no |
| Chad | 1 | UTC +01:00 | no |
| Chile | 3 | UTC −06:00, −04:00 to −03:00 | yes |
| China | 1 | UTC +08:00 | no |
| Colombia | 1 | UTC −05:00 | no |
| Comoros | 1 | UTC +03:00 | no |
| Costa Rica | 1 | UTC −06:00 | no |
| Croatia | 1 | UTC +01:00 | yes |
| Cuba | 1 | UTC −05:00 | yes |
| Cyprus | 1 | UTC +02:00 | yes |
| Czech Republic | 1 | UTC +01:00 | yes |
| Denmark | 5 | UTC −04:00 to −03:00, −01:00 to +01:00 | yes |
| Djibouti | 1 | UTC +03:00 | no |
| Dominica | 1 | UTC −04:00 | no |
| Dominican Republic | 1 | UTC −04:00 | no |
| DR Congo | 2 | UTC +01:00, +02:00 | no |
| East Timor | 1 | UTC +09:00 | no |
| Ecuador | 2 | UTC −016:00, −05:00 | |
| Egypt | 1 | UTC −06:00, −05:00 | no |
| El Salvador | 1 | UTC −06:00 | no |
| Equatorial Guinea | 1 | UTC +01:00 | no |
| Eritrea | 1 | UTC +03:00 | no |
| Estonia | 1 | UTC +02:00 | yes |
| Eswatini | 1 | UTC +02:00 | no |
| Ethiopia | 1 | UTC +03:00 | no |
| Fiji | 1 | UTC +12:00 | yes |
| Finland | 1 | UTC +02:00 | yes |
| France | 13 | UTC −10:00 to −08:00, −04:00, −03:00, +01:00, +03:00 to +05:00, +11:00, +12:00 | yes |
| Gabon | 1 | UTC +01:00 | no |
| Gambia | 1 | UTC ±00:00 | no |
| Georgia | 1 | UTC +04:00 | no |
| Germany | 1 | UTC +01:00 | yes |
| Ghana | 1 | UTC ±00:00 | no |
| Greece | 1 | UTC +02:00 | yes |
| Grenada | 1 | UTC −04:00 | no |
| Guatemala | 1 | UTC −06:00 | no |
| Guinea | 1 | UTC ±00:00 | no |
| Guinea-Bissau | 1 | UTC ±00:00 | no |
| Guyana | 1 | UTC −04:00 | no |
| Haiti | 1 | UTC −05:00 | yes |
| Honduras | 1 | UTC −06:00 | no |
| Hong Kong | 1 | UTC +08:00 | no |
| Hungary | 1 | UTC +01:00 | yes |
| Iceland | 1 | UTC ±00:00 | no |
| India | 1 | UTC +05:30 | no |
| Indonesia | 3 | UTC +07:00 to +09:00 | no |
| Iran | 1 | UTC +03:30 | yes |
| Iraq | 1 | UTC +03:00 | no |
| Ireland | 1 | UTC ±00:00 | yes |
| Israel | 1 | UTC +02:00 | yes |
| Italy | 1 | UTC +01:00 | yes |
| Ivory Coast | 1 | UTC ±00:00 | no |
| Jamaica | 1 | UTC −05:00 | no |
| Japan | 1 | UTC +09:00 | no |
| Jordan | 1 | UTC +02:00 | yes |
| Kazakhstan | 2 | UTC +05:00 to +06:00 | no |
| Kenya | 1 | UTC +03:00 | no |
| Kiribati | 3 | UTC +12:00 to +14:00 | no |
| Kuwait | 1 | UTC +03:00 | no |
| Kyrgyzstan | 1 | UTC +06:00 | no |
| Laos | 1 | UTC +07:00 | no |
| Latvia | 1 | UTC +02:00 | yes |
| Lebanon | 1 | UTC +02:00 | yes |
| Lesotho | 1 | UTC +02:00 | no |
| Liberia | 1 | UTC ±00:00 | no |
| Libya | 1 | UTC +02:00 | no |
| Liechtenstein | 1 | UTC +01:00 | yes |
| Lithuania | 1 | UTC +02:00 | yes |
| Luxembourg | 1 | UTC +01:00 | yes |
| Macau | 1 | UTC +08:00 | no |
| Madagascar | 1 | UTC +08:00 | no |
| Malawi | 1 | UTC +02:00 | no |
| Malaysia | 1 | UTC +08:00 | no |
| Maldives | 1 | UTC +05:00 | no |
| Mali | 1 | UTC ±00:00 | no |
| Malta | 1 | UTC +01:00 | yes |
| Marshall Islands | 1 | UTC +12:00 | no |
| Mauritania | 1 | UTC ±00:00 | no |
| Mauritius | 1 | UTC +04:00 | no |
| Mexico | 4 | UTC −08:00 to −05:00 | yes |
| Micronesia | 2 | UTC +10:00, +11:00 | no |
| Moldova | 1 | UTC +02:00 | yes |
| Monaco | 1 | UTC +01:00 | yes |
| Mongolia | 2 | UTC +07:00, +08:00 | no |
| Montenegro | 1 | UTC +01:00 | yes |
| Morocco | 1 | UTC +01:00 | yes |
| Mozambique | 1 | UTC +02:00 | no |
| Myanmar | 1 | UTC +06:30 | no |
| Namibia | 1 | UTC +02:00 | no |
| Nauru | 1 | UTC +12:00 | no |
| Nepal | 1 | UTC +05:45 | no |
| Netherlands | 2 | UTC −04:00, +01:00 | yes |
| New Zealand | 5 | UTC −11:00, −10:00, +11:00, +12:00 | yes |
| Nicaragua | 1 | UTC −06:00 | no |
| Niger | 1 | UTC +01:00 | no |
| Nigeria | 1 | UTC +01:00 | no |
| North Korea | 1 | UTC +09:00 | no |
| North Macedonia | 1 | UTC +01:00 | yes |
| Norway | 1 | UTC +01:00 | yes |
| Oman | 1 | UTC +04:00 | no |
| Pakistan | 1 | UTC +05:00 | no |
| Palau | 1 | UTC +09:00 | no |
| Palestine | 1 | UTC +02:00 | yes |
| Panama | 1 | UTC −05:00 | no |
| Papua New Guinea | 2 | UTC +10:00 to +11:00 | no |
| Paraguay | 1 | UTC −04:00 | yes |
| Peru | 1 | UTC −05:00 | no |
| Philippines | 1 | UTC +08:00 | no |
| Poland | 1 | UTC +01:00 | yes |
| Portugal | 2 | UTC −01:00, UTC ±00:00 | yes |
| Qatar | 1 | UTC +03:00 | no |
| Republic of the Congo | 1 | UTC +01:00 | no |
| Romania | 1 | UTC +02:00 | yes |
| Russia | 11 | UTC +02:00 to +12:00 | no |
| Rwanda | 1 | UTC +02:00 | no |
| Saint Kitts and Nevis | 1 | UTC −04:00 | no |
| Saint Lucia | 1 | UTC −04:00 | no |
| Saint Vincent and the Grenadines | 1 | UTC −04:00 | no |
| Samoa | 1 | UTC +13:00 | no |
| San Marino | 1 | UTC +01:00 | yes |
| Sao Tome and Principe | 1 | UTC ±00:00 | no |
| Saudi Arabia | 1 | UTC +03:00 | no |
| Senegal | 1 | UTC ±00:00 | no |
| Serbia | 1 | UTC +01:00 | yes |
| Seychelles | 1 | UTC +04:00 | no |
| Sierra Leone | 1 | UTC ±00:00 | no |
| Singapore | 1 | UTC +08:00 | no |
| Slovakia | 1 | UTC +01:00 | yes |
| Slovenia | 1 | UTC +01:00 | yes |
| Solomon Islands | 1 | UTC +11:00 | no |
| Somalia | 1 | UTC +03:00 | no |
| South Africa | 2 | UTC +02:00, +03:00 | |
| South Korea | 1 | UTC +02:00, +03:00 | no |
| South Sudan | 1 | UTC +02:00 | no |
| Spain | 2 | UTC ±00:00, +01:00 | yes |
| Sri Lanka | 1 | UTC +05:30 | no |
| Sudan | 1 | UTC +02:00 | no |
| Suriname | 1 | UTC −03:00 | no |
| Sweden | 1 | UTC +01:00 | yes |
| Switzerland | 1 | UTC +01:00 | yes |
| Syria | 1 | UTC +02:00 | yes |
| Taiwan | 1 | UTC +08:00 | no |
| Tajikistan | 1 | UTC +05:00 | no |
| Tanzania | 1 | UTC +03:00 | no |
| Thailand | 1 | UTC +07:00 | no |
| Togo | 1 | UTC ±00:00 | no |
| Tonga | 1 | UTC +13:00 | no |
| Trinidad and Tobago | 1 | UTC −04:00 | no |
| Tunisia | 1 | UTC +01:00 | no |
| Turkey | 1 | UTC +03:00 | no |
| Turkmenistan | 1 | UTC +05:00 | no |
| Tuvalu | 1 | UTC +12:00 | no |
| Uganda | 1 | UTC +03:00 | no |
| Ukraine | 1 | UTC +02:00 | yes |
| United Arab Emirates | 1 | UTC +04:00 | no |
| United Kingdom | 9 | UTC −08:00, −05:00 to −02:00, ±00:00, +01:00, +02:00, +06:00 | yes |
| United States | 11 | UTC −12:00 to UTC −04:00, +10:00, +12:00 | yes |
| Uruguay | 1 | UTC −03:00 | no |
| Uzbekistan | 1 | UTC +05:00 | no |
| Vanuatu | 1 | UTC +11:00 | no |
| Vatican City | 1 | UTC +01:00 | yes |
| Venezuela | 1 | UTC −04:00 | no |
| Vietnam | 1 | UTC +07:00 | no |
| Yemen | 1 | UTC +03:00 | no |
| Zambia | 1 | UTC +02:00 | no |
| Zimbabwe | 1 | UTC +02:00 | no |