Local time difference with Porto
Time difference to major cities
| Afghanistan | |
| Kabul | +4:30 hours |
| Argentina | |
| Buenos Aires | -3 hours |
| Armenia | |
| Yerevan | +4 hours |
| Australia | |
| Perth | +8 hours |
| Darwin | +9:30 hours |
| Brisbane | +10 hours |
| Adelaide | +10:30 hours |
| Canberra | +11 hours |
| Hobart | +11 hours |
| Melbourne | +11 hours |
| Sydney | +11 hours |
| Austria | |
| Salzburg | +1 hour |
| Vienna | +1 hour |
| Azerbaijan | |
| Baku | +4 hours |
| Bahamas | |
| Nassau | -5 hours |
| Bangladesh | |
| Dhaka | +6 hours |
| Belarus | |
| Minsk | +3 hours |
| Belgium | |
| Brussels | +1 hour |
| Brazil | |
| Brasilia | -3 hours |
| Rio de Janeiro | -3 hours |
| Sao Paulo | -3 hours |
| Bulgaria | |
| Sofia | +2 hours |
| Cambodia | |
| Phnom Penh | +7 hours |
| Canada | |
| Vancouver | -8 hours |
| Calgary | -7 hours |
| Edmonton | -7 hours |
| Regina | -6 hours |
| Winnipeg | -6 hours |
| Ottawa | -5 hours |
| Toronto | -5 hours |
| Halifax | -4 hours |
| St. John's | -3:30 hours |
| Chile | |
| Santiago | -3 hours |
| China | |
| Beijing | +8 hours |
| Chengdu | +8 hours |
| Hong Kong | +8 hours |
| Macau | +8 hours |
| Shanghai | +8 hours |
| Colombia | |
| Bogota | -5 hours |
| Cali | -5 hours |
| Medellin | -5 hours |
| Congo | |
| Brazzaville | +1 hour |
| Cote d'Ivoire | |
| Abidjan | same time |
| Croatia | |
| Zagreb | +1 hour |
| Czech Republic | |
| Prague | +1 hour |
| Democratic Republic of the Congo | |
| Kinshasa | +1 hour |
| Denmark | |
| Copenhagen | +1 hour |
| Djibouti | |
| Djibouti | +3 hours |
| Dominican Republic | |
| Santo Domingo | -4 hours |
| Ecuador | |
| Quito | -5 hours |
| Egypt | |
| Cairo | +2 hours |
| Eritrea | |
| Asmara | +3 hours |
| Estonia | |
| Tallinn | +2 hours |
| Ethiopia | |
| Addis Ababa | +3 hours |
| Finland | |
| Helsinki | +2 hours |
| France | |
| Nice | +1 hour |
| Paris | +1 hour |
| Georgia | |
| Tbilisi | +4 hours |
| Germany | |
| Berlin | +1 hour |
| Dusseldorf | +1 hour |
| Frankfurt | +1 hour |
| Hamburg | +1 hour |
| Munich | +1 hour |
| Ghana | |
| Accra | same time |
| Greece | |
| Athens | +2 hours |
| Guatemala | |
| Guatemala | -6 hours |
| Haiti | |
| Port-au-Prince | -5 hours |
| Hungary | |
| Budapest | +1 hour |
| Iceland | |
| Reykjavik | same time |
| India | |
| Bangalore | +5:30 hours |
| Chennai | +5:30 hours |
| Delhi | +5:30 hours |
| Hyderabad | +5:30 hours |
| Jaipur | +5:30 hours |
| Kolkata | +5:30 hours |
| Mumbai | +5:30 hours |
| New Delhi | +5:30 hours |
| Pune | +5:30 hours |
| Indonesia | |
| Jakarta | +7 hours |
| Iran | |
| Tehran | +3:30 hours |
| Iraq | |
| Baghdad | +3 hours |
| Ireland | |
| Dublin | same time |
| Israel | |
| Jerusalem | +2 hours |
| Tel Aviv | +2 hours |
| Italy | |
| Milan | +1 hour |
| Rome | +1 hour |
| Venice | +1 hour |
| Japan | |
| Kyoto | +9 hours |
| Nagoya | +9 hours |
| Osaka | +9 hours |
| Tokyo | +9 hours |
| Jordan | |
| Amman | +3 hours |
| Kazakhstan | |
| Almaty | +5 hours |
| Astana | +5 hours |
| Kenya | |
| Nairobi | +3 hours |
| Kiribati | |
| Kiritimati | +14 hours |
| Kyrgyzstan | |
| Bishkek | +6 hours |
| Latvia | |
| Riga | +2 hours |
| Lebanon | |
| Beirut | +2 hours |
| Lithuania | |
| Vilnius | +2 hours |
| Luxembourg | |
| Luxembourg | +1 hour |
| Malaysia | |
| Kuala Lumpur | +8 hours |
| Marshall Islands | |
| Majuro | +12 hours |
| Mexico | |
| Mexicali | -8 hours |
| Tijuana | -8 hours |
| Guadalajara | -6 hours |
| Mexico City | -6 hours |
| Cancun | -5 hours |
| Monaco | |
| Monaco | +1 hour |
| Mongolia | |
| Ulaanbaatar | +8 hours |
| Morocco | |
| Casablanca | +1 hour |
| Myanmar | |
| Yangon | +6:30 hours |
| Nepal | |
| Kathmandu | +5:45 hours |
| Netherlands | |
| Amsterdam | +1 hour |
| Rotterdam | +1 hour |
| New Zealand | |
| Auckland | +13 hours |
| Christchurch | +13 hours |
| Wellington | +13 hours |
| Nicaragua | |
| Managua | -6 hours |
| Nigeria | |
| Abuja | +1 hour |
| Lagos | +1 hour |
| Northern Mariana Islands | |
| Saipan | +10 hours |
| Norway | |
| Oslo | +1 hour |
| Oman | |
| Muscat | +4 hours |
| Pakistan | |
| Islamabad | +5 hours |
| Karachi | +5 hours |
| Lahore | +5 hours |
| Panama | |
| Panama | -5 hours |
| Peru | |
| Lima | -5 hours |
| Philippines | |
| Manila | +8 hours |
| Poland | |
| Krakow | +1 hour |
| Warsaw | +1 hour |
| Wroclaw | +1 hour |
| Portugal | |
| Lisbon | same time |
| Puerto Rico | |
| San Juan | -4 hours |
| Qatar | |
| Doha | +3 hours |
| Romania | |
| Bucharest | +2 hours |
| Russia | |
| Moscow | +3 hours |
| Saint-Peterburg | +3 hours |
| Chelyabinsk | +5 hours |
| Yekaterinburg | +5 hours |
| Krasnoyarsk | +7 hours |
| Novosibirsk | +7 hours |
| Vladivostok | +10 hours |
| Rwanda | |
| Kigali | +2 hours |
| Saudi Arabia | |
| Jeddah | +3 hours |
| Mecca | +3 hours |
| Riyadh | +3 hours |
| Senegal | |
| Dakar | same time |
| Serbia | |
| Belgrade | +1 hour |
| Singapore | |
| Singapore | +8 hours |
| Slovakia | |
| Bratislava | +1 hour |
| South Africa | |
| Cape Town | +2 hours |
| Johannesburg | +2 hours |
| Pretoria | +2 hours |
| South Korea | |
| Seoul | +9 hours |
| Spain | |
| Barcelona | +1 hour |
| Madrid | +1 hour |
| Sri Lanka | |
| Colombo | +5:30 hours |
| Sudan | |
| Khartoum | +2 hours |
| Sweden | |
| Stockholm | +1 hour |
| Switzerland | |
| Bern | +1 hour |
| Geneva | +1 hour |
| Lausanne | +1 hour |
| Zurich | +1 hour |
| Syria | |
| Damascus | +3 hours |
| Taiwan | |
| Taipei | +8 hours |
| Tanzania | |
| Dar es Salaam | +3 hours |
| Thailand | |
| Bangkok | +7 hours |
| Togo | |
| Lome | same time |
| Tunisia | |
| Tunis | +1 hour |
| Turkey | |
| Ankara | +3 hours |
| Istanbul | +3 hours |
| Uganda | |
| Kampala | +3 hours |
| Ukraine | |
| Odesa | +2 hours |
| United Arab Emirates | |
| Abu Dhabi | +4 hours |
| Dubai | +4 hours |
| United Kingdom | |
| Belfast | same time |
| Birmingham | same time |
| Edinburgh | same time |
| Glasgow | same time |
| Liverpool | same time |
| London | same time |
| United States | |
| Honolulu | -10 hours |
| Anchorage | -9 hours |
| Anaheim | -8 hours |
| Las Vegas | -8 hours |
| Los Angeles | -8 hours |
| Oakland | -8 hours |
| Portland | -8 hours |
| Sacramento | -8 hours |
| San Diego | -8 hours |
| San Francisco | -8 hours |
| San Jose | -8 hours |
| Seattle | -8 hours |
| Stockton | -8 hours |
| Albuquerque | -7 hours |
| Boise | -7 hours |
| Denver | -7 hours |
| El Paso | -7 hours |
| Phoenix | -7 hours |
| Salt Lake City | -7 hours |
| Santa Fe | -7 hours |
| Tucson | -7 hours |
| Arlington | -6 hours |
| Austin | -6 hours |
| Baton Rouge | -6 hours |
| Chicago | -6 hours |
| Dallas | -6 hours |
| Des Moines | -6 hours |
| Fort Worth | -6 hours |
| Houston | -6 hours |
| Kansas City | -6 hours |
| Little Rock | -6 hours |
| Madison | -6 hours |
| Memphis | -6 hours |
| Milwaukee | -6 hours |
| Minneapolis | -6 hours |
| Nashville | -6 hours |
| New Orleans | -6 hours |
| Oklahoma City | -6 hours |
| San Antonio | -6 hours |
| Sioux Falls | -6 hours |
| St. Louis | -6 hours |
| Wichita | -6 hours |
| Atlanta | -5 hours |
| Baltimore | -5 hours |
| Boston | -5 hours |
| Charlotte | -5 hours |
| Cincinnati | -5 hours |
| Cleveland | -5 hours |
| Columbia | -5 hours |
| Columbus | -5 hours |
| Detroit | -5 hours |
| Indianapolis | -5 hours |
| Knoxville | -5 hours |
| Louisville | -5 hours |
| Miami | -5 hours |
| New York | -5 hours |
| Newark | -5 hours |
| Philadelphia | -5 hours |
| Pittsburgh | -5 hours |
| Raleigh | -5 hours |
| Tampa | -5 hours |
| Virginia Beach | -5 hours |
| Washington | -5 hours |
| Guam | +10 hours |
| Uruguay | |
| Montevideo | -3 hours |
| Uzbekistan | |
| Tashkent | +5 hours |
| Venezuela | |
| Caracas | -4 hours |
| Vietnam | |
| Hanoi | +7 hours |
| Zambia | |
| Lusaka | +2 hours |
Time difference to major time zones
| ACDT | +10:30 hours | GST | +4 hours |
| AEDT | +11 hours | HAST | -10 hours |
| AEST | +10 hours | IST | +5:30 hours |
| AKDT | -8 hours | JST | +9 hours |
| AMT | -4 hours | KST | +9 hours |
| AST | -4 hours | MDT | -6 hours |
| BDT | +8 hours | MIST | +11 hours |
| BNT | +8 hours | MST | -7 hours |
| BOT | -4 hours | NDT | -2:30 hours |
| BRST | -2 hours | NPT | +5:45 hours |
| BST | +1 hour | NRT | +12 hours |
| CCT | +6:30 hours | NST | -3:30 hours |
| CDT | -5 hours | NZST | +12 hours |
| CEST | +2 hours | PDT | -7 hours |
| CET | +1 hour | PHT | +8 hours |
| CLST | -3 hours | PKT | +5 hours |
| COST | -4 hours | PST | -8 hours |
| COT | -5 hours | PT | -8 hours |
| CST | -6 hours | SRT | -3 hours |
| CT | -6 hours | SST | -11 hours |
| EDT | -4 hours | TOT | +13 hours |
| EST | -5 hours | UTC | same time |
| ET | -5 hours | WAST | +2 hours |
| GMT | same time |