Port of Spain Time Zone Converter — GMT-4 Time Difference
Drag the interactive slider or click the time display to set a time in this Port of Spain time zone converter (UTC-4:00) — then select any city below to instantly see the exact Port of Spain time difference and current local time across 429 cities. Whether you need to find overlapping work hours with a colleague in Port of Spain, schedule an international call from Port of Spain, or check what time it is anywhere relative to UTC-4:00 — this converter handles daylight saving time and UTC offset changes automatically.
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Port of Spain
Port of Spain
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Port of Spain (AST) (UTC-4:00)
- Abbreviation
- AST
- UTC Offset
- UTC-4:00
- City
- Port of Spain
- Country
- Trinidad & Tobago
Port of Spain Time Zone — Convert to All Timezones
Pick any of the 429 cities below to open the full Port of Spain time difference converter with a 24-hour conversion table, live current local time display, and hour-by-hour meeting planner. Cities are grouped by region — use the search box to find any city, country, or timezone abbreviation instantly. Every conversion page handles daylight saving time and UTC offsets automatically.
Africa
GMT Abidjan, Ivory Coast
UTC+0:00 GMT Accra, Ghana
UTC+0:00 GMT Bamako, Mali
UTC+0:00 GMT Banjul, Gambia
UTC+0:00 GMT Bissau, Guinea-Bissau
UTC+0:00 GMT Conakry, Guinea
UTC+0:00 GMT Dakar, Senegal
UTC+0:00 GMT Freetown, Sierra Leone
UTC+0:00 GMT Lome, Togo
UTC+0:00 GMT Monrovia, Liberia
UTC+0:00 GMT Nouakchott, Mauritania
UTC+0:00 GMT Ouagadougou, Burkina Faso
UTC+0:00 GMT Sao Tome, Sao Tome & Principe
UTC+0:00 CET Algiers, Algeria
UTC+1:00 WAT Bangui, Central African Rep.
UTC+1:00 WAT Brazzaville, Congo (Rep.)
UTC+1:00 WET Casablanca, Morocco
UTC+1:00 CET Ceuta, Spain
UTC+1:00 WAT Douala, Cameroon
UTC+1:00 +01 El Aaiun, Western Sahara
UTC+1:00 WAT Kinshasa, Congo (Dem. Rep.)
UTC+1:00 WAT Lagos, Nigeria
UTC+1:00 WAT Libreville, Gabon
UTC+1:00 WAT Luanda, Angola
UTC+1:00 WAT Malabo, Equatorial Guinea
UTC+1:00 WAT Ndjamena, Chad
UTC+1:00 WAT Niamey, Niger
UTC+1:00 WAT Porto-Novo, Benin
UTC+1:00 CET Tunis, Tunisia
UTC+1:00 CAT Blantyre, Malawi
UTC+2:00 CAT Bujumbura, Burundi
UTC+2:00 EET Cairo, Egypt
UTC+2:00 CAT Gaborone, Botswana
UTC+2:00 CAT Harare, Zimbabwe
UTC+2:00 SAST Johannesburg, South Africa
UTC+2:00 CAT Juba, South Sudan
UTC+2:00 CAT Khartoum, Sudan
UTC+2:00 CAT Kigali, Rwanda
UTC+2:00 CAT Lubumbashi, Congo (Dem. Rep.)
UTC+2:00 CAT Lusaka, Zambia
UTC+2:00 CAT Maputo, Mozambique
UTC+2:00 SAST Maseru, Lesotho
UTC+2:00 SAST Mbabane, Eswatini (Swaziland)
UTC+2:00 EET Tripoli, Libya
UTC+2:00 CAT Windhoek, Namibia
UTC+2:00 EAT Addis Ababa, Ethiopia
UTC+3:00 EAT Asmara, Eritrea
UTC+3:00 EAT Dar es Salaam, Tanzania
UTC+3:00 EAT Djibouti, Djibouti
UTC+3:00 EAT Kampala, Uganda
UTC+3:00 EAT Mogadishu, Somalia
UTC+3:00 EAT Nairobi, Kenya
UTC+3:00 America
HST Adak, United States
UTC-10:00 AKST Anchorage, United States
UTC-9:00 AKST Juneau, United States
UTC-9:00 AKST Metlakatla, United States
UTC-9:00 AKST Nome, United States
UTC-9:00 AKST Sitka, United States
UTC-9:00 AKST Yakutat, United States
UTC-9:00 PST Los Angeles, United States
UTC-8:00 PST Tijuana, Mexico
UTC-8:00 PST Vancouver, Canada
UTC-8:00 MST Boise, United States
UTC-7:00 MST Cambridge Bay, Canada
UTC-7:00 MST Ciudad Juarez, Mexico
UTC-7:00 MST Creston, Canada
UTC-7:00 MST Dawson, Canada
UTC-7:00 MST Dawson Creek, Canada
UTC-7:00 MST Denver, United States
UTC-7:00 MST Edmonton, Canada
UTC-7:00 MST Fort Nelson, Canada
UTC-7:00 MST Hermosillo, Mexico
UTC-7:00 MST Inuvik, Canada
UTC-7:00 MST Mazatlan, Mexico
UTC-7:00 MST Phoenix, United States
UTC-7:00 MST Whitehorse, Canada
UTC-7:00 MST Yellowknife, Canada
UTC-7:00 CST Bahia Banderas, Mexico
UTC-6:00 CST Belize, Belize
UTC-6:00 CST Chicago, United States
UTC-6:00 CST Chihuahua, Mexico
UTC-6:00 CST Costa Rica, Costa Rica
UTC-6:00 CST El Salvador, El Salvador
UTC-6:00 CST Guatemala, Guatemala
UTC-6:00 CST Knox, United States
UTC-6:00 CST Tell City, United States
UTC-6:00 CST Managua, Nicaragua
UTC-6:00 CST Matamoros, Mexico
UTC-6:00 CST Menominee, United States
UTC-6:00 CST Merida, Mexico
UTC-6:00 CST Mexico City, Mexico
UTC-6:00 CST Monterrey, Mexico
UTC-6:00 CST Beulah, United States
UTC-6:00 CST Center, United States
UTC-6:00 CST New Salem, United States
UTC-6:00 CST Ojinaga, Mexico
UTC-6:00 CST Rainy River, Canada
UTC-6:00 CST Rankin Inlet, Canada
UTC-6:00 CST Regina, Canada
UTC-6:00 CST Resolute, Canada
UTC-6:00 CST Swift Current, Canada
UTC-6:00 CST Tegucigalpa, Honduras
UTC-6:00 CST Winnipeg, Canada
UTC-6:00 EST Atikokan, Canada
UTC-5:00 COT Bogotá, Colombia
UTC-5:00 EST Cancun, Mexico
UTC-5:00 EST Cayman, Cayman Islands
UTC-5:00 EST Detroit, United States
UTC-5:00 -05 Eirunepe, Brazil
UTC-5:00 EST Grand Turk, Turks & Caicos Is
UTC-5:00 -05 Guayaquil, Ecuador
UTC-5:00 CST Havana, Cuba
UTC-5:00 EST Indianapolis, United States
UTC-5:00 EST Marengo, United States
UTC-5:00 EST Petersburg, United States
UTC-5:00 EST Vevay, United States
UTC-5:00 EST Vincennes, United States
UTC-5:00 EST Winamac, United States
UTC-5:00 EST Iqaluit, Canada
UTC-5:00 EST Kingston, Jamaica
UTC-5:00 EST Louisville, United States
UTC-5:00 EST Monticello, United States
UTC-5:00 PET Lima, Peru
UTC-5:00 EST Montreal, Canada
UTC-5:00 EST Nassau, Bahamas
UTC-5:00 EST New York, United States
UTC-5:00 EST Nipigon, Canada
UTC-5:00 EST Panama City, Panama
UTC-5:00 EST Pangnirtung, Canada
UTC-5:00 EST Port-au-Prince, Haiti
UTC-5:00 -05 Rio Branco, Brazil
UTC-5:00 EST Thunder Bay, Canada
UTC-5:00 EST Toronto, Canada
UTC-5:00 AST Anguilla, Anguilla
UTC-4:00 AST Antigua, Antigua & Barbuda
UTC-4:00 AST Aruba, Aruba
UTC-4:00 AST Barbados, Barbados
UTC-4:00 AST Blanc-Sablon, Canada
UTC-4:00 -04 Boa Vista, Brazil
UTC-4:00 -04 Campo Grande, Brazil
UTC-4:00 VET Caracas, Venezuela
UTC-4:00 -04 Cuiaba, Brazil
UTC-4:00 AST Curacao, Curaçao
UTC-4:00 AST Dominica, Dominica
UTC-4:00 AST Glace Bay, Canada
UTC-4:00 AST Goose Bay, Canada
UTC-4:00 AST Grenada, Grenada
UTC-4:00 AST Guadeloupe, Guadeloupe
UTC-4:00 -04 Guyana, Guyana
UTC-4:00 AST Halifax, Canada
UTC-4:00 AST Kralendijk, Caribbean NL
UTC-4:00 -04 La Paz, Bolivia
UTC-4:00 AST Lower Princes, St Maarten (Dutch)
UTC-4:00 -04 Manaus, Brazil
UTC-4:00 AST Marigot, St Martin (French)
UTC-4:00 AST Martinique, Martinique
UTC-4:00 AST Moncton, Canada
UTC-4:00 AST Montserrat, Montserrat
UTC-4:00 -04 Porto Velho, Brazil
UTC-4:00 AST San Juan, Puerto Rico
UTC-4:00 AST Santo Domingo, Dominican Republic
UTC-4:00 AST St Barthelemy, St Barthelemy
UTC-4:00 AST St Kitts, St Kitts & Nevis
UTC-4:00 AST St Lucia, St Lucia
UTC-4:00 AST St Thomas, Virgin Islands (US)
UTC-4:00 AST St Vincent, St Vincent
UTC-4:00 AST Thule, Greenland
UTC-4:00 AST Tortola, Virgin Islands (UK)
UTC-4:00 NST St. John's, Canada
UTC-3:30 -03 Araguaina, Brazil
UTC-3:00 ART Buenos Aires, Argentina
UTC-3:00 -03 Catamarca, Argentina
UTC-3:00 -03 ComodRivadavia, Argentina
UTC-3:00 -03 Cordoba, Argentina
UTC-3:00 -03 Jujuy, Argentina
UTC-3:00 -03 La Rioja, Argentina
UTC-3:00 -03 Mendoza, Argentina
UTC-3:00 -03 Rio Gallegos, Argentina
UTC-3:00 -03 Salta, Argentina
UTC-3:00 -03 San Juan, Argentina
UTC-3:00 -03 San Luis, Argentina
UTC-3:00 -03 Tucuman, Argentina
UTC-3:00 -03 Ushuaia, Argentina
UTC-3:00 -03 Asuncion, Paraguay
UTC-3:00 -03 Bahia, Brazil
UTC-3:00 -03 Belem, Brazil
UTC-3:00 -03 Cayenne, French Guiana
UTC-3:00 -03 Coyhaique, Chile
UTC-3:00 -03 Fortaleza, Brazil
UTC-3:00 -03 Maceio, Brazil
UTC-3:00 -03 Miquelon, St Pierre & Miquelon
UTC-3:00 -03 Montevideo, Uruguay
UTC-3:00 -03 Paramaribo, Suriname
UTC-3:00 -03 Punta Arenas, Chile
UTC-3:00 -03 Recife, Brazil
UTC-3:00 -03 Santarem, Brazil
UTC-3:00 CLT Santiago, Chile
UTC-3:00 BRT São Paulo, Brazil
UTC-3:00 -02 Noronha, Brazil
UTC-2:00 -02 Nuuk, Greenland
UTC-2:00 -02 Scoresbysund, Greenland
UTC-2:00 GMT Danmarkshavn, Greenland
UTC+0:00 Antarctica
-03 Palmer, Antarctica
UTC-3:00 -03 Rothera, Antarctica
UTC-3:00 +00 Troll, Antarctica
UTC+0:00 +03 Syowa, Antarctica
UTC+3:00 +05 Mawson, Antarctica
UTC+5:00 +05 Vostok, Antarctica
UTC+5:00 +07 Davis, Antarctica
UTC+7:00 +08 Casey, Antarctica
UTC+8:00 +10 DumontDUrville, Antarctica
UTC+10:00 AEDT Macquarie, Australia
UTC+11:00 NZDT McMurdo, Antarctica
UTC+13:00 Asia
EET Beirut, Lebanon
UTC+2:00 EET Famagusta, Cyprus
UTC+2:00 EET Gaza, Palestine
UTC+2:00 EET Hebron, Palestine
UTC+2:00 IST Jerusalem, Israel
UTC+2:00 EET Nicosia, Cyprus
UTC+2:00 +03 Aden, Yemen
UTC+3:00 EET Amman, Jordan
UTC+3:00 AST Baghdad, Iraq
UTC+3:00 AST Manama, Bahrain
UTC+3:00 EET Damascus, Syria
UTC+3:00 TRT Istanbul, Turkey
UTC+3:00 AST Kuwait City, Kuwait
UTC+3:00 AST Doha, Qatar
UTC+3:00 AST Riyadh, Saudi Arabia
UTC+3:00 IRST Tehran, Iran
UTC+3:30 AZT Baku, Azerbaijan
UTC+4:00 GST Dubai, United Arab Emirates
UTC+4:00 GST Muscat, Oman
UTC+4:00 +04 Tbilisi, Georgia
UTC+4:00 +04 Yerevan, Armenia
UTC+4:00 AFT Kabul, Afghanistan
UTC+4:30 ALMT Almaty, Kazakhstan
UTC+5:00 +05 Aqtau, Kazakhstan
UTC+5:00 +05 Aqtobe, Kazakhstan
UTC+5:00 +05 Ashgabat, Turkmenistan
UTC+5:00 +05 Atyrau, Kazakhstan
UTC+5:00 +05 Dushanbe, Tajikistan
UTC+5:00 PKT Karachi, Pakistan
UTC+5:00 +05 Oral, Kazakhstan
UTC+5:00 +05 Qostanay, Kazakhstan
UTC+5:00 +05 Qyzylorda, Kazakhstan
UTC+5:00 +05 Samarkand, Uzbekistan
UTC+5:00 UZT Tashkent, Uzbekistan
UTC+5:00 +05 Yekaterinburg, Russia
UTC+5:00 IST Colombo, Sri Lanka
UTC+5:30 IST Kolkata, India
UTC+5:30 NPT Kathmandu, Nepal
UTC+5:45 +06 Bishkek, Kyrgyzstan
UTC+6:00 BST Dhaka, Bangladesh
UTC+6:00 +06 Omsk, Russia
UTC+6:00 +06 Thimphu, Bhutan
UTC+6:00 +06 Urumqi, China
UTC+6:00 MMT Yangon, Myanmar
UTC+6:30 ICT Bangkok, Thailand
UTC+7:00 +07 Barnaul, Russia
UTC+7:00 ICT Ho Chi Minh City, Vietnam
UTC+7:00 +07 Hovd, Mongolia
UTC+7:00 WIB Jakarta, Indonesia
UTC+7:00 +07 Krasnoyarsk, Russia
UTC+7:00 +07 Novokuznetsk, Russia
UTC+7:00 +07 Novosibirsk, Russia
UTC+7:00 +07 Phnom Penh, Cambodia
UTC+7:00 WIB Pontianak, Indonesia
UTC+7:00 +07 Tomsk, Russia
UTC+7:00 +07 Vientiane, Laos
UTC+7:00 +08 Brunei, Brunei
UTC+8:00 +08 Choibalsan, Mongolia
UTC+8:00 HKT Hong Kong, Hong Kong
UTC+8:00 +08 Irkutsk, Russia
UTC+8:00 MYT Kuala Lumpur, Malaysia
UTC+8:00 +08 Kuching, Malaysia
UTC+8:00 CST Macau, Macau
UTC+8:00 WITA Makassar, Indonesia
UTC+8:00 PHT Manila, Philippines
UTC+8:00 CST Shanghai, China
UTC+8:00 SGT Singapore, Singapore
UTC+8:00 CST Taipei, Taiwan
UTC+8:00 +08 Ulaanbaatar, Mongolia
UTC+8:00 +09 Chita, Russia
UTC+9:00 +09 Dili, East Timor
UTC+9:00 WIT Jayapura, Indonesia
UTC+9:00 +09 Khandyga, Russia
UTC+9:00 KST Pyongyang, Korea (North)
UTC+9:00 KST Seoul, South Korea
UTC+9:00 JST Tokyo, Japan
UTC+9:00 +09 Yakutsk, Russia
UTC+9:00 +10 Ust-Nera, Russia
UTC+10:00 +10 Vladivostok, Russia
UTC+10:00 +11 Magadan, Russia
UTC+11:00 +11 Sakhalin, Russia
UTC+11:00 +11 Srednekolymsk, Russia
UTC+11:00 +12 Anadyr, Russia
UTC+12:00 +12 Kamchatka, Russia
UTC+12:00 Atlantic
AST Bermuda, Bermuda
UTC-4:00 -03 Stanley, Falkland Islands
UTC-3:00 -02 South Georgia, South Georgia & the South Sandwich Islands
UTC-2:00 AZOT Ponta Delgada, Portugal
UTC-1:00 -01 Cape Verde, Cape Verde
UTC-1:00 WET Canary, Spain
UTC+0:00 WET Faroe, Faroe Islands
UTC+0:00 WET Madeira, Portugal
UTC+0:00 GMT Reykjavik, Iceland
UTC+0:00 GMT St Helena, St Helena
UTC+0:00 Australia
AWST Perth, Australia
UTC+8:00 +0845 Eucla, Australia
UTC+8:45 ACST Darwin, Australia
UTC+9:30 AEST Brisbane, Australia
UTC+10:00 AEST Lindeman, Australia
UTC+10:00 ACST Adelaide, Australia
UTC+10:30 ACDT Broken Hill, Australia
UTC+10:30 AEDT Canberra, Australia
UTC+11:00 AEDT Currie, Australia
UTC+11:00 AEST Hobart, Australia
UTC+11:00 +11 Lord Howe, Australia
UTC+11:00 AEST Melbourne, Australia
UTC+11:00 AEST Sydney, Australia
UTC+11:00 Europe
GMT Dublin, Ireland
UTC+0:00 GMT Guernsey, Guernsey
UTC+0:00 GMT Isle of Man, Isle of Man
UTC+0:00 GMT Jersey, Jersey
UTC+0:00 WET Lisbon, Portugal
UTC+0:00 GMT London, United Kingdom
UTC+0:00 CET Amsterdam, Netherlands
UTC+1:00 CET Andorra, Andorra
UTC+1:00 CET Belgrade, Serbia
UTC+1:00 CET Berlin, Germany
UTC+1:00 CET Bratislava, Slovakia
UTC+1:00 CET Brussels, Belgium
UTC+1:00 CET Budapest, Hungary
UTC+1:00 CET Busingen, Germany
UTC+1:00 CET Copenhagen, Denmark
UTC+1:00 CET Gibraltar, Gibraltar
UTC+1:00 CET Ljubljana, Slovenia
UTC+1:00 CET Luxembourg, Luxembourg
UTC+1:00 CET Madrid, Spain
UTC+1:00 CET Malta, Malta
UTC+1:00 CET Monaco, Monaco
UTC+1:00 CET Oslo, Norway
UTC+1:00 CET Paris, France
UTC+1:00 CET Podgorica, Montenegro
UTC+1:00 CET Prague, Czech Republic
UTC+1:00 CET Rome, Italy
UTC+1:00 CET San Marino, San Marino
UTC+1:00 CET Sarajevo, Bosnia & Herzegovina
UTC+1:00 CET Skopje, North Macedonia
UTC+1:00 CET Stockholm, Sweden
UTC+1:00 CET Tirane, Albania
UTC+1:00 CET Vaduz, Liechtenstein
UTC+1:00 CET Vatican, Vatican City
UTC+1:00 CET Vienna, Austria
UTC+1:00 CET Warsaw, Poland
UTC+1:00 CET Zagreb, Croatia
UTC+1:00 CET Zurich, Switzerland
UTC+1:00 EET Athens, Greece
UTC+2:00 EET Bucharest, Romania
UTC+2:00 EET Chisinau, Moldova
UTC+2:00 EET Helsinki, Finland
UTC+2:00 EET Kaliningrad, Russia
UTC+2:00 EET Kyiv, Ukraine
UTC+2:00 EET Mariehamn, Åland Islands
UTC+2:00 EET Riga, Latvia
UTC+2:00 EET Sofia, Bulgaria
UTC+2:00 EET Tallinn, Estonia
UTC+2:00 EET Uzhgorod, Ukraine
UTC+2:00 EET Vilnius, Lithuania
UTC+2:00 EET Zaporozhye, Ukraine
UTC+2:00 MSK Kirov, Russia
UTC+3:00 +03 Minsk, Belarus
UTC+3:00 MSK Moscow, Russia
UTC+3:00 MSK Simferopol, Ukraine
UTC+3:00 MSK Volgograd, Russia
UTC+3:00 +04 Astrakhan, Russia
UTC+4:00 +04 Samara, Russia
UTC+4:00 +04 Saratov, Russia
UTC+4:00 +04 Ulyanovsk, Russia
UTC+4:00 Indian
EAT Antananarivo, Madagascar
UTC+3:00 EAT Comoro, Comoros
UTC+3:00 EAT Mayotte, Mayotte
UTC+3:00 +04 Mahe, Seychelles
UTC+4:00 +04 Mauritius, Mauritius
UTC+4:00 +04 Reunion, Réunion
UTC+4:00 +05 Kerguelen, French S. Terr.
UTC+5:00 +05 Maldives, Maldives
UTC+5:00 +06 Chagos, British Indian Ocean Territory
UTC+6:00 +0630 Cocos, Cocos (Keeling) Islands
UTC+6:30 +07 Christmas, Christmas Island
UTC+7:00 Pacific
SST Midway, United States
UTC-11:00 -11 Niue, Niue
UTC-11:00 SST Pago Pago, American Samoa
UTC-11:00 HST Honolulu, United States
UTC-10:00 -10 Rarotonga, Cook Islands
UTC-10:00 TAHT Papeete, French Polynesia
UTC-10:00 -0930 Marquesas, French Polynesia
UTC-9:30 -09 Gambier, French Polynesia
UTC-9:00 -08 Pitcairn, Pitcairn
UTC-8:00 -06 Galapagos, Ecuador
UTC-6:00 -05 Easter, Chile
UTC-5:00 +09 Palau, Palau
UTC+9:00 +10 Chuuk, Micronesia
UTC+10:00 ChST Hagåtña, Guam
UTC+10:00 PGT Port Moresby, Papua New Guinea
UTC+10:00 ChST Saipan, Northern Mariana Islands
UTC+10:00 +11 Bougainville, Papua New Guinea
UTC+11:00 +11 Efate, Vanuatu
UTC+11:00 +11 Guadalcanal, Solomon Islands
UTC+11:00 +11 Kosrae, Micronesia
UTC+11:00 NCT Nouméa, New Caledonia
UTC+11:00 +11 Pohnpei, Micronesia
UTC+11:00 FJT Suva, Fiji
UTC+12:00 +12 Funafuti, Tuvalu
UTC+12:00 +12 Kwajalein, Marshall Islands
UTC+12:00 +12 Majuro, Marshall Islands
UTC+12:00 +12 Nauru, Nauru
UTC+12:00 +12 Norfolk, Norfolk Island
UTC+12:00 +12 Tarawa, Kiribati
UTC+12:00 +12 Wake, US minor outlying islands
UTC+12:00 +12 Wallis, Wallis & Futuna
UTC+12:00 +13 Apia, Samoa (western)
UTC+13:00 NZST Auckland, New Zealand
UTC+13:00 +13 Fakaofo, Tokelau
UTC+13:00 +13 Kanton, Kiribati
UTC+13:00 TOT Nukuʻalofa, Tonga
UTC+13:00 +1345 Chatham, New Zealand
UTC+13:45 +14 Kiritimati, Kiribati
UTC+14:00 No timezones found matching your search.
What Time Is It Now in Port of Spain?
Live current local time in Port of Spain, Trinidad & Tobago — AST (UTC-4:00). Updates every second.
Loading current Port of Spain time...
What Is Port of Spain (GMT-4)?
Port of Spain follows the UTC-4:00 UTC offset. Port of Spain in Trinidad & Tobago is the primary reference city for this time zone. The Port of Spain time zone converter above lets you compare Port of Spain time with any city in the world — use the "Add timezone" search to build a multi-city world clock, pick a date to check daylight saving time transitions, and switch between 12-hour and 24-hour formats for a clear international time view.
Why Trust This Port of Spain Time Zone Converter?
ConvertFlash uses the IANA Time Zone Database — the same authoritative source that powers your phone, browser, and every major operating system — so every Port of Spain time conversion handles daylight saving time transitions, half-hour and quarter-hour UTC offsets, and historical time zone changes automatically. The live world clock updates every second, and all conversion tables regenerate correctly for any past or future date you select.