Local time difference with Helena
Time difference to major cities
| Afghanistan | |
| Kabul | +11:30 hours |
| Argentina | |
| Buenos Aires | +4 hours |
| Armenia | |
| Yerevan | +11 hours |
| Australia | |
| Perth | +15 hours |
| Darwin | +16:30 hours |
| Brisbane | +17 hours |
| Adelaide | +17:30 hours |
| Canberra | +18 hours |
| Hobart | +18 hours |
| Melbourne | +18 hours |
| Sydney | +18 hours |
| Austria | |
| Salzburg | +8 hours |
| Vienna | +8 hours |
| Azerbaijan | |
| Baku | +11 hours |
| Bahamas | |
| Nassau | +2 hours |
| Bangladesh | |
| Dhaka | +13 hours |
| Belarus | |
| Minsk | +10 hours |
| Belgium | |
| Brussels | +8 hours |
| Brazil | |
| Brasilia | +4 hours |
| Rio de Janeiro | +4 hours |
| Sao Paulo | +4 hours |
| Bulgaria | |
| Sofia | +9 hours |
| Cambodia | |
| Phnom Penh | +14 hours |
| Canada | |
| Vancouver | -1 hour |
| Calgary | same time |
| Edmonton | same time |
| Regina | +1 hour |
| Winnipeg | +1 hour |
| Ottawa | +2 hours |
| Toronto | +2 hours |
| Halifax | +3 hours |
| St. John's | +3:30 hours |
| Chile | |
| Santiago | +4 hours |
| China | |
| Beijing | +15 hours |
| Chengdu | +15 hours |
| Hong Kong | +15 hours |
| Macau | +15 hours |
| Shanghai | +15 hours |
| Colombia | |
| Bogota | +2 hours |
| Cali | +2 hours |
| Medellin | +2 hours |
| Congo | |
| Brazzaville | +8 hours |
| Cote d'Ivoire | |
| Abidjan | +7 hours |
| Croatia | |
| Zagreb | +8 hours |
| Czech Republic | |
| Prague | +8 hours |
| Democratic Republic of the Congo | |
| Kinshasa | +8 hours |
| Denmark | |
| Copenhagen | +8 hours |
| Djibouti | |
| Djibouti | +10 hours |
| Dominican Republic | |
| Santo Domingo | +3 hours |
| Ecuador | |
| Quito | +2 hours |
| Egypt | |
| Cairo | +9 hours |
| Eritrea | |
| Asmara | +10 hours |
| Estonia | |
| Tallinn | +9 hours |
| Ethiopia | |
| Addis Ababa | +10 hours |
| Finland | |
| Helsinki | +9 hours |
| France | |
| Nice | +8 hours |
| Paris | +8 hours |
| Georgia | |
| Tbilisi | +11 hours |
| Germany | |
| Berlin | +8 hours |
| Dusseldorf | +8 hours |
| Frankfurt | +8 hours |
| Hamburg | +8 hours |
| Munich | +8 hours |
| Ghana | |
| Accra | +7 hours |
| Greece | |
| Athens | +9 hours |
| Guatemala | |
| Guatemala | +1 hour |
| Haiti | |
| Port-au-Prince | +2 hours |
| Hungary | |
| Budapest | +8 hours |
| Iceland | |
| Reykjavik | +7 hours |
| India | |
| Bangalore | +12:30 hours |
| Chennai | +12:30 hours |
| Delhi | +12:30 hours |
| Hyderabad | +12:30 hours |
| Jaipur | +12:30 hours |
| Kolkata | +12:30 hours |
| Mumbai | +12:30 hours |
| New Delhi | +12:30 hours |
| Pune | +12:30 hours |
| Indonesia | |
| Jakarta | +14 hours |
| Iran | |
| Tehran | +10:30 hours |
| Iraq | |
| Baghdad | +10 hours |
| Ireland | |
| Dublin | +7 hours |
| Israel | |
| Jerusalem | +9 hours |
| Tel Aviv | +9 hours |
| Italy | |
| Milan | +8 hours |
| Rome | +8 hours |
| Venice | +8 hours |
| Japan | |
| Kyoto | +16 hours |
| Nagoya | +16 hours |
| Osaka | +16 hours |
| Tokyo | +16 hours |
| Jordan | |
| Amman | +10 hours |
| Kazakhstan | |
| Almaty | +12 hours |
| Astana | +12 hours |
| Kenya | |
| Nairobi | +10 hours |
| Kiribati | |
| Kiritimati | +21 hours |
| Kyrgyzstan | |
| Bishkek | +13 hours |
| Latvia | |
| Riga | +9 hours |
| Lebanon | |
| Beirut | +9 hours |
| Lithuania | |
| Vilnius | +9 hours |
| Luxembourg | |
| Luxembourg | +8 hours |
| Malaysia | |
| Kuala Lumpur | +15 hours |
| Marshall Islands | |
| Majuro | +19 hours |
| Mexico | |
| Mexicali | -1 hour |
| Tijuana | -1 hour |
| Guadalajara | +1 hour |
| Mexico City | +1 hour |
| Cancun | +2 hours |
| Monaco | |
| Monaco | +8 hours |
| Mongolia | |
| Ulaanbaatar | +15 hours |
| Morocco | |
| Casablanca | +8 hours |
| Myanmar | |
| Yangon | +13:30 hours |
| Nepal | |
| Kathmandu | +12:45 hours |
| Netherlands | |
| Amsterdam | +8 hours |
| Rotterdam | +8 hours |
| New Zealand | |
| Auckland | +20 hours |
| Christchurch | +20 hours |
| Wellington | +20 hours |
| Nicaragua | |
| Managua | +1 hour |
| Nigeria | |
| Abuja | +8 hours |
| Lagos | +8 hours |
| Northern Mariana Islands | |
| Saipan | +17 hours |
| Norway | |
| Oslo | +8 hours |
| Oman | |
| Muscat | +11 hours |
| Pakistan | |
| Islamabad | +12 hours |
| Karachi | +12 hours |
| Lahore | +12 hours |
| Panama | |
| Panama | +2 hours |
| Peru | |
| Lima | +2 hours |
| Philippines | |
| Manila | +15 hours |
| Poland | |
| Krakow | +8 hours |
| Warsaw | +8 hours |
| Wroclaw | +8 hours |
| Portugal | |
| Lisbon | +7 hours |
| Puerto Rico | |
| San Juan | +3 hours |
| Qatar | |
| Doha | +10 hours |
| Romania | |
| Bucharest | +9 hours |
| Russia | |
| Moscow | +10 hours |
| Saint-Peterburg | +10 hours |
| Chelyabinsk | +12 hours |
| Yekaterinburg | +12 hours |
| Krasnoyarsk | +14 hours |
| Novosibirsk | +14 hours |
| Vladivostok | +17 hours |
| Rwanda | |
| Kigali | +9 hours |
| Saudi Arabia | |
| Jeddah | +10 hours |
| Mecca | +10 hours |
| Riyadh | +10 hours |
| Senegal | |
| Dakar | +7 hours |
| Serbia | |
| Belgrade | +8 hours |
| Singapore | |
| Singapore | +15 hours |
| Slovakia | |
| Bratislava | +8 hours |
| South Africa | |
| Cape Town | +9 hours |
| Johannesburg | +9 hours |
| Pretoria | +9 hours |
| South Korea | |
| Seoul | +16 hours |
| Spain | |
| Barcelona | +8 hours |
| Madrid | +8 hours |
| Sri Lanka | |
| Colombo | +12:30 hours |
| Sudan | |
| Khartoum | +9 hours |
| Sweden | |
| Stockholm | +8 hours |
| Switzerland | |
| Bern | +8 hours |
| Geneva | +8 hours |
| Lausanne | +8 hours |
| Zurich | +8 hours |
| Syria | |
| Damascus | +10 hours |
| Taiwan | |
| Taipei | +15 hours |
| Tanzania | |
| Dar es Salaam | +10 hours |
| Thailand | |
| Bangkok | +14 hours |
| Togo | |
| Lome | +7 hours |
| Tunisia | |
| Tunis | +8 hours |
| Turkey | |
| Ankara | +10 hours |
| Istanbul | +10 hours |
| Uganda | |
| Kampala | +10 hours |
| Ukraine | |
| Odesa | +9 hours |
| United Arab Emirates | |
| Abu Dhabi | +11 hours |
| Dubai | +11 hours |
| United Kingdom | |
| Belfast | +7 hours |
| Birmingham | +7 hours |
| Edinburgh | +7 hours |
| Glasgow | +7 hours |
| Liverpool | +7 hours |
| London | +7 hours |
| United States | |
| Honolulu | -3 hours |
| Anchorage | -2 hours |
| Anaheim | -1 hour |
| Las Vegas | -1 hour |
| Los Angeles | -1 hour |
| Oakland | -1 hour |
| Portland | -1 hour |
| Sacramento | -1 hour |
| San Diego | -1 hour |
| San Francisco | -1 hour |
| San Jose | -1 hour |
| Seattle | -1 hour |
| Stockton | -1 hour |
| Albuquerque | same time |
| Boise | same time |
| Denver | same time |
| El Paso | same time |
| Phoenix | same time |
| Salt Lake City | same time |
| Santa Fe | same time |
| Tucson | same time |
| Arlington | +1 hour |
| Austin | +1 hour |
| Baton Rouge | +1 hour |
| Chicago | +1 hour |
| Dallas | +1 hour |
| Des Moines | +1 hour |
| Fort Worth | +1 hour |
| Houston | +1 hour |
| Kansas City | +1 hour |
| Little Rock | +1 hour |
| Madison | +1 hour |
| Memphis | +1 hour |
| Milwaukee | +1 hour |
| Minneapolis | +1 hour |
| Nashville | +1 hour |
| New Orleans | +1 hour |
| Oklahoma City | +1 hour |
| San Antonio | +1 hour |
| Sioux Falls | +1 hour |
| St. Louis | +1 hour |
| Wichita | +1 hour |
| Atlanta | +2 hours |
| Baltimore | +2 hours |
| Boston | +2 hours |
| Charlotte | +2 hours |
| Cincinnati | +2 hours |
| Cleveland | +2 hours |
| Columbia | +2 hours |
| Columbus | +2 hours |
| Detroit | +2 hours |
| Indianapolis | +2 hours |
| Knoxville | +2 hours |
| Louisville | +2 hours |
| Miami | +2 hours |
| New York | +2 hours |
| Newark | +2 hours |
| Philadelphia | +2 hours |
| Pittsburgh | +2 hours |
| Raleigh | +2 hours |
| Tampa | +2 hours |
| Virginia Beach | +2 hours |
| Washington | +2 hours |
| Guam | +17 hours |
| Uruguay | |
| Montevideo | +4 hours |
| Uzbekistan | |
| Tashkent | +12 hours |
| Venezuela | |
| Caracas | +3 hours |
| Vietnam | |
| Hanoi | +14 hours |
| Zambia | |
| Lusaka | +9 hours |
Time difference to major time zones
| ACDT | +17:30 hours | GST | +11 hours |
| AEDT | +18 hours | HAST | -3 hours |
| AEST | +17 hours | IST | +12:30 hours |
| AKDT | -1 hour | JST | +16 hours |
| AMT | +3 hours | KST | +16 hours |
| AST | +3 hours | MDT | +1 hour |
| BDT | +15 hours | MIST | +18 hours |
| BNT | +15 hours | MST | same time |
| BOT | +3 hours | NDT | +4:30 hours |
| BRST | +5 hours | NPT | +12:45 hours |
| BST | +8 hours | NRT | +19 hours |
| CCT | +13:30 hours | NST | +3:30 hours |
| CDT | +2 hours | NZST | +19 hours |
| CEST | +9 hours | PDT | same time |
| CET | +8 hours | PHT | +15 hours |
| CLST | +4 hours | PKT | +12 hours |
| COST | +3 hours | PST | -1 hour |
| COT | +2 hours | PT | -1 hour |
| CST | +1 hour | SRT | +4 hours |
| CT | +1 hour | SST | -4 hours |
| EDT | +3 hours | TOT | +20 hours |
| EST | +2 hours | UTC | +7 hours |
| ET | +2 hours | WAST | +9 hours |
| GMT | +7 hours |