How to get list of all timezones in javascript
JavascriptTimezoneReact IntlJavascript Problem Overview
I am developing an application with react/redux, and I started using library react-intl for formatting messages and dates.
I have already been able to show in a <FormattedDate> tag what timezone it's using.
I would like to have in a select all the possible timezones existing, so when the user picks one timezone, the <FormattedDate> changes to that format automatically.
I don't find how to list all posible timezones with react-intl.
I have also searched in google, and I did not find any built-in javascript function that does that.
Is it that way? How can I obtain that list?
Note: Don't think its the same question, since I don't want to use external libraries, if possible, if its the only solution then I will have to handle that way... :/
Javascript Solutions
Solution 1 - Javascript
I recently created an array containing all timezones and found that a couple of official timezones were missing from Chromium 71.0.3578.98.
You can see that array in this comment of the bug I reported. For convenience, I've included the array below:
var aryIannaTimeZones = [
'Europe/Andorra',
'Asia/Dubai',
'Asia/Kabul',
'Europe/Tirane',
'Asia/Yerevan',
'Antarctica/Casey',
'Antarctica/Davis',
'Antarctica/DumontDUrville', // https://bugs.chromium.org/p/chromium/issues/detail?id=928068
'Antarctica/Mawson',
'Antarctica/Palmer',
'Antarctica/Rothera',
'Antarctica/Syowa',
'Antarctica/Troll',
'Antarctica/Vostok',
'America/Argentina/Buenos_Aires',
'America/Argentina/Cordoba',
'America/Argentina/Salta',
'America/Argentina/Jujuy',
'America/Argentina/Tucuman',
'America/Argentina/Catamarca',
'America/Argentina/La_Rioja',
'America/Argentina/San_Juan',
'America/Argentina/Mendoza',
'America/Argentina/San_Luis',
'America/Argentina/Rio_Gallegos',
'America/Argentina/Ushuaia',
'Pacific/Pago_Pago',
'Europe/Vienna',
'Australia/Lord_Howe',
'Antarctica/Macquarie',
'Australia/Hobart',
'Australia/Currie',
'Australia/Melbourne',
'Australia/Sydney',
'Australia/Broken_Hill',
'Australia/Brisbane',
'Australia/Lindeman',
'Australia/Adelaide',
'Australia/Darwin',
'Australia/Perth',
'Australia/Eucla',
'Asia/Baku',
'America/Barbados',
'Asia/Dhaka',
'Europe/Brussels',
'Europe/Sofia',
'Atlantic/Bermuda',
'Asia/Brunei',
'America/La_Paz',
'America/Noronha',
'America/Belem',
'America/Fortaleza',
'America/Recife',
'America/Araguaina',
'America/Maceio',
'America/Bahia',
'America/Sao_Paulo',
'America/Campo_Grande',
'America/Cuiaba',
'America/Santarem',
'America/Porto_Velho',
'America/Boa_Vista',
'America/Manaus',
'America/Eirunepe',
'America/Rio_Branco',
'America/Nassau',
'Asia/Thimphu',
'Europe/Minsk',
'America/Belize',
'America/St_Johns',
'America/Halifax',
'America/Glace_Bay',
'America/Moncton',
'America/Goose_Bay',
'America/Blanc-Sablon',
'America/Toronto',
'America/Nipigon',
'America/Thunder_Bay',
'America/Iqaluit',
'America/Pangnirtung',
'America/Atikokan',
'America/Winnipeg',
'America/Rainy_River',
'America/Resolute',
'America/Rankin_Inlet',
'America/Regina',
'America/Swift_Current',
'America/Edmonton',
'America/Cambridge_Bay',
'America/Yellowknife',
'America/Inuvik',
'America/Creston',
'America/Dawson_Creek',
'America/Fort_Nelson',
'America/Vancouver',
'America/Whitehorse',
'America/Dawson',
'Indian/Cocos',
'Europe/Zurich',
'Africa/Abidjan',
'Pacific/Rarotonga',
'America/Santiago',
'America/Punta_Arenas',
'Pacific/Easter',
'Asia/Shanghai',
'Asia/Urumqi',
'America/Bogota',
'America/Costa_Rica',
'America/Havana',
'Atlantic/Cape_Verde',
'America/Curacao',
'Indian/Christmas',
'Asia/Nicosia',
'Asia/Famagusta',
'Europe/Prague',
'Europe/Berlin',
'Europe/Copenhagen',
'America/Santo_Domingo',
'Africa/Algiers',
'America/Guayaquil',
'Pacific/Galapagos',
'Europe/Tallinn',
'Africa/Cairo',
'Africa/El_Aaiun',
'Europe/Madrid',
'Africa/Ceuta',
'Atlantic/Canary',
'Europe/Helsinki',
'Pacific/Fiji',
'Atlantic/Stanley',
'Pacific/Chuuk',
'Pacific/Pohnpei',
'Pacific/Kosrae',
'Atlantic/Faroe',
'Europe/Paris',
'Europe/London',
'Asia/Tbilisi',
'America/Cayenne',
'Africa/Accra',
'Europe/Gibraltar',
'America/Godthab',
'America/Danmarkshavn',
'America/Scoresbysund',
'America/Thule',
'Europe/Athens',
'Atlantic/South_Georgia',
'America/Guatemala',
'Pacific/Guam',
'Africa/Bissau',
'America/Guyana',
'Asia/Hong_Kong',
'America/Tegucigalpa',
'America/Port-au-Prince',
'Europe/Budapest',
'Asia/Jakarta',
'Asia/Pontianak',
'Asia/Makassar',
'Asia/Jayapura',
'Europe/Dublin',
'Asia/Jerusalem',
'Asia/Kolkata',
'Indian/Chagos',
'Asia/Baghdad',
'Asia/Tehran',
'Atlantic/Reykjavik',
'Europe/Rome',
'America/Jamaica',
'Asia/Amman',
'Asia/Tokyo',
'Africa/Nairobi',
'Asia/Bishkek',
'Pacific/Tarawa',
'Pacific/Enderbury',
'Pacific/Kiritimati',
'Asia/Pyongyang',
'Asia/Seoul',
'Asia/Almaty',
'Asia/Qyzylorda',
'Asia/Qostanay', // https://bugs.chromium.org/p/chromium/issues/detail?id=928068
'Asia/Aqtobe',
'Asia/Aqtau',
'Asia/Atyrau',
'Asia/Oral',
'Asia/Beirut',
'Asia/Colombo',
'Africa/Monrovia',
'Europe/Vilnius',
'Europe/Luxembourg',
'Europe/Riga',
'Africa/Tripoli',
'Africa/Casablanca',
'Europe/Monaco',
'Europe/Chisinau',
'Pacific/Majuro',
'Pacific/Kwajalein',
'Asia/Yangon',
'Asia/Ulaanbaatar',
'Asia/Hovd',
'Asia/Choibalsan',
'Asia/Macau',
'America/Martinique',
'Europe/Malta',
'Indian/Mauritius',
'Indian/Maldives',
'America/Mexico_City',
'America/Cancun',
'America/Merida',
'America/Monterrey',
'America/Matamoros',
'America/Mazatlan',
'America/Chihuahua',
'America/Ojinaga',
'America/Hermosillo',
'America/Tijuana',
'America/Bahia_Banderas',
'Asia/Kuala_Lumpur',
'Asia/Kuching',
'Africa/Maputo',
'Africa/Windhoek',
'Pacific/Noumea',
'Pacific/Norfolk',
'Africa/Lagos',
'America/Managua',
'Europe/Amsterdam',
'Europe/Oslo',
'Asia/Kathmandu',
'Pacific/Nauru',
'Pacific/Niue',
'Pacific/Auckland',
'Pacific/Chatham',
'America/Panama',
'America/Lima',
'Pacific/Tahiti',
'Pacific/Marquesas',
'Pacific/Gambier',
'Pacific/Port_Moresby',
'Pacific/Bougainville',
'Asia/Manila',
'Asia/Karachi',
'Europe/Warsaw',
'America/Miquelon',
'Pacific/Pitcairn',
'America/Puerto_Rico',
'Asia/Gaza',
'Asia/Hebron',
'Europe/Lisbon',
'Atlantic/Madeira',
'Atlantic/Azores',
'Pacific/Palau',
'America/Asuncion',
'Asia/Qatar',
'Indian/Reunion',
'Europe/Bucharest',
'Europe/Belgrade',
'Europe/Kaliningrad',
'Europe/Moscow',
'Europe/Simferopol',
'Europe/Kirov',
'Europe/Astrakhan',
'Europe/Volgograd',
'Europe/Saratov',
'Europe/Ulyanovsk',
'Europe/Samara',
'Asia/Yekaterinburg',
'Asia/Omsk',
'Asia/Novosibirsk',
'Asia/Barnaul',
'Asia/Tomsk',
'Asia/Novokuznetsk',
'Asia/Krasnoyarsk',
'Asia/Irkutsk',
'Asia/Chita',
'Asia/Yakutsk',
'Asia/Khandyga',
'Asia/Vladivostok',
'Asia/Ust-Nera',
'Asia/Magadan',
'Asia/Sakhalin',
'Asia/Srednekolymsk',
'Asia/Kamchatka',
'Asia/Anadyr',
'Asia/Riyadh',
'Pacific/Guadalcanal',
'Indian/Mahe',
'Africa/Khartoum',
'Europe/Stockholm',
'Asia/Singapore',
'America/Paramaribo',
'Africa/Juba',
'Africa/Sao_Tome',
'America/El_Salvador',
'Asia/Damascus',
'America/Grand_Turk',
'Africa/Ndjamena',
'Indian/Kerguelen',
'Asia/Bangkok',
'Asia/Dushanbe',
'Pacific/Fakaofo',
'Asia/Dili',
'Asia/Ashgabat',
'Africa/Tunis',
'Pacific/Tongatapu',
'Europe/Istanbul',
'America/Port_of_Spain',
'Pacific/Funafuti',
'Asia/Taipei',
'Europe/Kiev',
'Europe/Uzhgorod',
'Europe/Zaporozhye',
'Pacific/Wake',
'America/New_York',
'America/Detroit',
'America/Kentucky/Louisville',
'America/Kentucky/Monticello',
'America/Indiana/Indianapolis',
'America/Indiana/Vincennes',
'America/Indiana/Winamac',
'America/Indiana/Marengo',
'America/Indiana/Petersburg',
'America/Indiana/Vevay',
'America/Chicago',
'America/Indiana/Tell_City',
'America/Indiana/Knox',
'America/Menominee',
'America/North_Dakota/Center',
'America/North_Dakota/New_Salem',
'America/North_Dakota/Beulah',
'America/Denver',
'America/Boise',
'America/Phoenix',
'America/Los_Angeles',
'America/Anchorage',
'America/Juneau',
'America/Sitka',
'America/Metlakatla',
'America/Yakutat',
'America/Nome',
'America/Adak',
'Pacific/Honolulu',
'America/Montevideo',
'Asia/Samarkand',
'Asia/Tashkent',
'America/Caracas',
'Asia/Ho_Chi_Minh',
'Pacific/Efate',
'Pacific/Wallis',
'Pacific/Apia',
'Africa/Johannesburg'
];
let date = new Date;
aryIannaTimeZones.forEach((timeZone) => {
let strTime = date.toLocaleString("en-US", {
timeZone: `${timeZone}`
});
console.log(timeZone, strTime);
});
If you're like me, in wondering why there are so many timezones, check out this question.
Solution 2 - Javascript
For the future searchers, it's possible to get a list of all timezones using moment-timezone.
import momentTZ from 'moment-timezone';
const defaultTimeZone = momentTZ.tz.guess();
const timeZonesList = momentTZ.tz.names();
Solution 3 - Javascript
I too needed to have a complete time zone list with preformated data like:
{
name: "America/Los_Angeles",
alternativeName: "Pacific Time",
group: ["America/Los_Angeles"],
countryName: "United States",
mainCities: ["Los Angeles", "San Diego"],
rawOffsetInMinutes: -480, // "raw" time zone offset, when there's no DST in place
rawFormat: "-08:00 Pacific Time - Los Angeles, San Diego",
currentTimeOffsetInMinutes: -420, // "current" time zone offset, this is why getTimeZones() is a method and not just an object: it can only work at runtime
currentTimeFormat: "-07:00 Pacific Time - Los Angeles, San Diego",
}
Since I could not find a good list that would also be maintained, I created an npm package for it: https://github.com/vvo/tzdb/. The list of time zones is automatically updated when there are changes (like new time zones).
You can then use https://github.com/moment/luxon if you need to manipulate dates with time zones.
The list of time zones is grouped to reduce the number of time zones. We do grouping only when: same country AND same offsets (DST, non DST).
This basically gives you a time zone list that is very close to the one from Google Calendar.
Good luck!
Solution 4 - Javascript
I did not find the list of time-zone through browser javascript so created array of timezone list and used it.
Till Dec 25, 2020 in JAVA 11 ZoneRulesProvider.java
Create array/collection and use this without external library > I found 600 sorted TimeZone
'Africa/Abidjan','Africa/Accra','Africa/Addis_Ababa','Africa/Algiers','Africa/Asmara','Africa/Asmera','Africa/Bamako','Africa/Bangui','Africa/Banjul','Africa/Bissau','Africa/Blantyre','Africa/Brazzaville','Africa/Bujumbura','Africa/Cairo','Africa/Casablanca','Africa/Ceuta','Africa/Conakry','Africa/Dakar','Africa/Dar_es_Salaam','Africa/Djibouti','Africa/Douala','Africa/El_Aaiun','Africa/Freetown','Africa/Gaborone','Africa/Harare','Africa/Johannesburg','Africa/Juba','Africa/Kampala','Africa/Khartoum','Africa/Kigali','Africa/Kinshasa','Africa/Lagos','Africa/Libreville','Africa/Lome','Africa/Luanda','Africa/Lubumbashi','Africa/Lusaka','Africa/Malabo','Africa/Maputo','Africa/Maseru','Africa/Mbabane','Africa/Mogadishu','Africa/Monrovia','Africa/Nairobi','Africa/Ndjamena','Africa/Niamey','Africa/Nouakchott','Africa/Ouagadougou','Africa/Porto-Novo','Africa/Sao_Tome','Africa/Timbuktu','Africa/Tripoli','Africa/Tunis','Africa/Windhoek','America/Adak','America/Anchorage','America/Anguilla','America/Antigua','America/Araguaina','America/Argentina/Buenos_Aires','America/Argentina/Catamarca','America/Argentina/ComodRivadavia','America/Argentina/Cordoba','America/Argentina/Jujuy','America/Argentina/La_Rioja','America/Argentina/Mendoza','America/Argentina/Rio_Gallegos','America/Argentina/Salta','America/Argentina/San_Juan','America/Argentina/San_Luis','America/Argentina/Tucuman','America/Argentina/Ushuaia','America/Aruba','America/Asuncion','America/Atikokan','America/Atka','America/Bahia','America/Bahia_Banderas','America/Barbados','America/Belem','America/Belize','America/Blanc-Sablon','America/Boa_Vista','America/Bogota','America/Boise','America/Buenos_Aires','America/Cambridge_Bay','America/Campo_Grande','America/Cancun','America/Caracas','America/Catamarca','America/Cayenne','America/Cayman','America/Chicago','America/Chihuahua','America/Coral_Harbour','America/Cordoba','America/Costa_Rica','America/Creston','America/Cuiaba','America/Curacao','America/Danmarkshavn','America/Dawson','America/Dawson_Creek','America/Denver','America/Detroit','America/Dominica','America/Edmonton','America/Eirunepe','America/El_Salvador','America/Ensenada','America/Fort_Nelson','America/Fort_Wayne','America/Fortaleza','America/Glace_Bay','America/Godthab','America/Goose_Bay','America/Grand_Turk','America/Grenada','America/Guadeloupe','America/Guatemala','America/Guayaquil','America/Guyana','America/Halifax','America/Havana','America/Hermosillo','America/Indiana/Indianapolis','America/Indiana/Knox','America/Indiana/Marengo','America/Indiana/Petersburg','America/Indiana/Tell_City','America/Indiana/Vevay','America/Indiana/Vincennes','America/Indiana/Winamac','America/Indianapolis','America/Inuvik','America/Iqaluit','America/Jamaica','America/Jujuy','America/Juneau','America/Kentucky/Louisville','America/Kentucky/Monticello','America/Knox_IN','America/Kralendijk','America/La_Paz','America/Lima','America/Los_Angeles','America/Louisville','America/Lower_Princes','America/Maceio','America/Managua','America/Manaus','America/Marigot','America/Martinique','America/Matamoros','America/Mazatlan','America/Mendoza','America/Menominee','America/Merida','America/Metlakatla','America/Mexico_City','America/Miquelon','America/Moncton','America/Monterrey','America/Montevideo','America/Montreal','America/Montserrat','America/Nassau','America/New_York','America/Nipigon','America/Nome','America/Noronha','America/North_Dakota/Beulah','America/North_Dakota/Center','America/North_Dakota/New_Salem','America/Ojinaga','America/Panama','America/Pangnirtung','America/Paramaribo','America/Phoenix','America/Port-au-Prince','America/Port_of_Spain','America/Porto_Acre','America/Porto_Velho','America/Puerto_Rico','America/Punta_Arenas','America/Rainy_River','America/Rankin_Inlet','America/Recife','America/Regina','America/Resolute','America/Rio_Branco','America/Rosario','America/Santa_Isabel','America/Santarem','America/Santiago','America/Santo_Domingo','America/Sao_Paulo','America/Scoresbysund','America/Shiprock','America/Sitka','America/St_Barthelemy','America/St_Johns','America/St_Kitts','America/St_Lucia','America/St_Thomas','America/St_Vincent','America/Swift_Current','America/Tegucigalpa','America/Thule','America/Thunder_Bay','America/Tijuana','America/Toronto','America/Tortola','America/Vancouver','America/Virgin','America/Whitehorse','America/Winnipeg','America/Yakutat','America/Yellowknife','Antarctica/Casey','Antarctica/Davis','Antarctica/DumontDUrville','Antarctica/Macquarie','Antarctica/Mawson','Antarctica/McMurdo','Antarctica/Palmer','Antarctica/Rothera','Antarctica/South_Pole','Antarctica/Syowa','Antarctica/Troll','Antarctica/Vostok','Arctic/Longyearbyen','Asia/Aden','Asia/Almaty','Asia/Amman','Asia/Anadyr','Asia/Aqtau','Asia/Aqtobe','Asia/Ashgabat','Asia/Ashkhabad','Asia/Atyrau','Asia/Baghdad','Asia/Bahrain','Asia/Baku','Asia/Bangkok','Asia/Barnaul','Asia/Beirut','Asia/Bishkek','Asia/Brunei','Asia/Calcutta','Asia/Chita','Asia/Choibalsan','Asia/Chongqing','Asia/Chungking','Asia/Colombo','Asia/Dacca','Asia/Damascus','Asia/Dhaka','Asia/Dili','Asia/Dubai','Asia/Dushanbe','Asia/Famagusta','Asia/Gaza','Asia/Harbin','Asia/Hebron','Asia/Ho_Chi_Minh','Asia/Hong_Kong','Asia/Hovd','Asia/Irkutsk','Asia/Istanbul','Asia/Jakarta','Asia/Jayapura','Asia/Jerusalem','Asia/Kabul','Asia/Kamchatka','Asia/Karachi','Asia/Kashgar','Asia/Kathmandu','Asia/Katmandu','Asia/Khandyga','Asia/Kolkata','Asia/Krasnoyarsk','Asia/Kuala_Lumpur','Asia/Kuching','Asia/Kuwait','Asia/Macao','Asia/Macau','Asia/Magadan','Asia/Makassar','Asia/Manila','Asia/Muscat','Asia/Nicosia','Asia/Novokuznetsk','Asia/Novosibirsk','Asia/Omsk','Asia/Oral','Asia/Phnom_Penh','Asia/Pontianak','Asia/Pyongyang','Asia/Qatar','Asia/Qostanay','Asia/Qyzylorda','Asia/Rangoon','Asia/Riyadh','Asia/Saigon','Asia/Sakhalin','Asia/Samarkand','Asia/Seoul','Asia/Shanghai','Asia/Singapore','Asia/Srednekolymsk','Asia/Taipei','Asia/Tashkent','Asia/Tbilisi','Asia/Tehran','Asia/Tel_Aviv','Asia/Thimbu','Asia/Thimphu','Asia/Tokyo','Asia/Tomsk','Asia/Ujung_Pandang','Asia/Ulaanbaatar','Asia/Ulan_Bator','Asia/Urumqi','Asia/Ust-Nera','Asia/Vientiane','Asia/Vladivostok','Asia/Yakutsk','Asia/Yangon','Asia/Yekaterinburg','Asia/Yerevan','Atlantic/Azores','Atlantic/Bermuda','Atlantic/Canary','Atlantic/Cape_Verde','Atlantic/Faeroe','Atlantic/Faroe','Atlantic/Jan_Mayen','Atlantic/Madeira','Atlantic/Reykjavik','Atlantic/South_Georgia','Atlantic/St_Helena','Atlantic/Stanley','Australia/ACT','Australia/Adelaide','Australia/Brisbane','Australia/Broken_Hill','Australia/Canberra','Australia/Currie','Australia/Darwin','Australia/Eucla','Australia/Hobart','Australia/LHI','Australia/Lindeman','Australia/Lord_Howe','Australia/Melbourne','Australia/NSW','Australia/North','Australia/Perth','Australia/Queensland','Australia/South','Australia/Sydney','Australia/Tasmania','Australia/Victoria','Australia/West','Australia/Yancowinna','Brazil/Acre','Brazil/DeNoronha','Brazil/East','Brazil/West','CET','CST6CDT','Canada/Atlantic','Canada/Central','Canada/Eastern','Canada/Mountain','Canada/Newfoundland','Canada/Pacific','Canada/Saskatchewan','Canada/Yukon','Chile/Continental','Chile/EasterIsland','Cuba','EET','EST5EDT','Egypt','Eire','Etc/GMT','Etc/GMT+0','Etc/GMT+1','Etc/GMT+10','Etc/GMT+11','Etc/GMT+12','Etc/GMT+2','Etc/GMT+3','Etc/GMT+4','Etc/GMT+5','Etc/GMT+6','Etc/GMT+7','Etc/GMT+8','Etc/GMT+9','Etc/GMT-0','Etc/GMT-1','Etc/GMT-10','Etc/GMT-11','Etc/GMT-12','Etc/GMT-13','Etc/GMT-14','Etc/GMT-2','Etc/GMT-3','Etc/GMT-4','Etc/GMT-5','Etc/GMT-6','Etc/GMT-7','Etc/GMT-8','Etc/GMT-9','Etc/GMT0','Etc/Greenwich','Etc/UCT','Etc/UTC','Etc/Universal','Etc/Zulu','Europe/Amsterdam','Europe/Andorra','Europe/Astrakhan','Europe/Athens','Europe/Belfast','Europe/Belgrade','Europe/Berlin','Europe/Bratislava','Europe/Brussels','Europe/Bucharest','Europe/Budapest','Europe/Busingen','Europe/Chisinau','Europe/Copenhagen','Europe/Dublin','Europe/Gibraltar','Europe/Guernsey','Europe/Helsinki','Europe/Isle_of_Man','Europe/Istanbul','Europe/Jersey','Europe/Kaliningrad','Europe/Kiev','Europe/Kirov','Europe/Lisbon','Europe/Ljubljana','Europe/London','Europe/Luxembourg','Europe/Madrid','Europe/Malta','Europe/Mariehamn','Europe/Minsk','Europe/Monaco','Europe/Moscow','Europe/Nicosia','Europe/Oslo','Europe/Paris','Europe/Podgorica','Europe/Prague','Europe/Riga','Europe/Rome','Europe/Samara','Europe/San_Marino','Europe/Sarajevo','Europe/Saratov','Europe/Simferopol','Europe/Skopje','Europe/Sofia','Europe/Stockholm','Europe/Tallinn','Europe/Tirane','Europe/Tiraspol','Europe/Ulyanovsk','Europe/Uzhgorod','Europe/Vaduz','Europe/Vatican','Europe/Vienna','Europe/Vilnius','Europe/Volgograd','Europe/Warsaw','Europe/Zagreb','Europe/Zaporozhye','Europe/Zurich','GB','GB-Eire','GMT','GMT0','Greenwich','Hongkong','Iceland','Indian/Antananarivo','Indian/Chagos','Indian/Christmas','Indian/Cocos','Indian/Comoro','Indian/Kerguelen','Indian/Mahe','Indian/Maldives','Indian/Mauritius','Indian/Mayotte','Indian/Reunion','Iran','Israel','Jamaica','Japan','Kwajalein','Libya','MET','MST7MDT','Mexico/BajaNorte','Mexico/BajaSur','Mexico/General','NZ','NZ-CHAT','Navajo','PRC','PST8PDT','Pacific/Apia','Pacific/Auckland','Pacific/Bougainville','Pacific/Chatham','Pacific/Chuuk','Pacific/Easter','Pacific/Efate','Pacific/Enderbury','Pacific/Fakaofo','Pacific/Fiji','Pacific/Funafuti','Pacific/Galapagos','Pacific/Gambier','Pacific/Guadalcanal','Pacific/Guam','Pacific/Honolulu','Pacific/Johnston','Pacific/Kiritimati','Pacific/Kosrae','Pacific/Kwajalein','Pacific/Majuro','Pacific/Marquesas','Pacific/Midway','Pacific/Nauru','Pacific/Niue','Pacific/Norfolk','Pacific/Noumea','Pacific/Pago_Pago','Pacific/Palau','Pacific/Pitcairn','Pacific/Pohnpei','Pacific/Ponape','Pacific/Port_Moresby','Pacific/Rarotonga','Pacific/Saipan','Pacific/Samoa','Pacific/Tahiti','Pacific/Tarawa','Pacific/Tongatapu','Pacific/Truk','Pacific/Wake','Pacific/Wallis','Pacific/Yap','Poland','Portugal','ROK','Singapore','SystemV/AST4','SystemV/AST4ADT','SystemV/CST6','SystemV/CST6CDT','SystemV/EST5','SystemV/EST5EDT','SystemV/HST10','SystemV/MST7','SystemV/MST7MDT','SystemV/PST8','SystemV/PST8PDT','SystemV/YST9','SystemV/YST9YDT','Turkey','UCT','US/Alaska','US/Aleutian','US/Arizona','US/Central','US/East-Indiana','US/Eastern','US/Hawaii','US/Indiana-Starke','US/Michigan','US/Mountain','US/Pacific','US/Pacific-New','US/Samoa','UTC','Universal','W-SU','WET','Zulu'
Solution 5 - Javascript
I have updated the timezone list in the parent and child.
var rows = [
{
id: 1,
continent: 'Asia',
newRow: [
{id: 1, country: 'Dubai', tz: 'Asia/Dubai'},
{id: 2, country: 'Kabul', tz: 'Asia/Kabul'},
{id: 3, country: 'Yerevan', tz: 'Asia/Yerevan'},
{id: 4, country: 'Baku', tz: 'Asia/Baku'},
{id: 5, country: 'Dhaka', tz: 'Asia/Dhaka'},
{id: 6, country: 'Brunei', tz: 'Asia/Brunei'},
{id: 7, country: 'Thimphu', tz: 'Asia/Thimphu'},
{id: 8, country: 'Shanghai', tz: 'Asia/Shanghai'},
{id: 9, country: 'Urumqi', tz: 'Asia/Urumqi'},
{id: 10, country: 'Nicosia', tz: 'Asia/Nicosia'},
{id: 11, country: 'Famagusta', tz: 'Asia/Famagusta'},
{id: 12, country: 'Tbilisi', tz: 'Asia/Tbilisi'},
{id: 13, country: 'Hong_Kong', tz: 'Asia/Hong_Kong'},
{id: 14, country: 'Jakarta', tz: 'Asia/Jakarta'},
{id: 15, country: 'Pontianak', tz: 'Asia/Pontianak'},
{id: 16, country: 'Makassar', tz: 'Asia/Makassar'},
{id: 17, country: 'Jayapura', tz: 'Asia/Jayapura'},
{id: 18, country: 'Jerusalem', tz: 'Asia/Jerusalem'},
{id: 19, country: 'Kolkata', tz: 'Asia/Kolkata'},
{id: 20, country: 'Baghdad', tz: 'Asia/Baghdad'},
{id: 21, country: 'Tehran', tz: 'Asia/Tehran'},
{id: 22, country: 'Amman', tz: 'Asia/Amman'},
{id: 23, country: 'Tokyo', tz: 'Asia/Tokyo'},
{id: 24, country: 'Bishkek', tz: 'Asia/Bishkek'},
{id: 25, country: 'Pyongyang', tz: 'Asia/Pyongyang'},
{id: 26, country: 'Seoul', tz: 'Asia/Seoul'},
{id: 27, country: 'Almaty', tz: 'Asia/Almaty'},
{id: 28, country: 'Qyzylorda', tz: 'Asia/Qyzylorda'},
{id: 29, country: 'Qostanay', tz: 'Asia/Qostanay'},
{id: 30, country: 'Aqtobe', tz: 'Asia/Aqtobe'},
{id: 31, country: 'Aqtau', tz: 'Asia/Aqtau'},
{id: 32, country: 'Atyrau', tz: 'Asia/Atyrau'},
{id: 33, country: 'Oral', tz: 'Asia/Oral'},
{id: 34, country: 'Beirut', tz: 'Asia/Beirut'},
{id: 35, country: 'Colombo', tz: 'Asia/Colombo'},
{id: 36, country: 'Yangon', tz: 'Asia/Yangon'},
{id: 37, country: 'Ulaanbaatar', tz: 'Asia/Ulaanbaatar'},
{id: 38, country: 'Hovd', tz: 'Asia/Hovd'},
{id: 39, country: 'Choibalsan', tz: 'Asia/Choibalsan'},
{id: 40, country: 'Macau', tz: 'Asia/Macau'},
{id: 41, country: 'Kuala_Lumpur', tz: 'Asia/Kuala_Lumpur'},
{id: 42, country: 'Kuching', tz: 'Asia/Kuching'},
{id: 43, country: 'Karachi', tz: 'Asia/Karachi'},
{id: 44, country: 'Gaza', tz: 'Asia/Gaza'},
{id: 45, country: 'Hebron', tz: 'Asia/Hebron'},
{id: 46, country: 'Kathmandu', tz: 'Asia/Kathmandu'},
{id: 47, country: 'Yekaterinburg', tz: 'Asia/Yekaterinburg'},
{id: 48, country: 'Qatar', tz: 'Asia/Qatar'},
{id: 49, country: 'Omsk', tz: 'Asia/Omsk'},
{id: 50, country: 'Novosibirsk', tz: 'Asia/Novosibirsk'},
{id: 51, country: 'Barnaul', tz: 'Asia/Barnaul'},
{id: 52, country: 'Tomsk', tz: 'Asia/Tomsk'},
{id: 53, country: 'Novokuznetsk', tz: 'Asia/Novokuznetsk'},
{id: 54, country: 'Krasnoyarsk', tz: 'Asia/Krasnoyarsk'},
{id: 55, country: 'Irkutsk', tz: 'Asia/Irkutsk'},
{id: 56, country: 'Chita', tz: 'Asia/Chita'},
{id: 57, country: 'Yakutsk', tz: 'Asia/Yakutsk'},
{id: 58, country: 'Khandyga', tz: 'Asia/Khandyga'},
{id: 59, country: 'Vladivostok', tz: 'Asia/Vladivostok'},
{id: 60, country: 'Ust-Nera', tz: 'Asia/Ust-Nera'},
{id: 61, country: 'Singapore', tz: 'Asia/Singapore'},
{id: 62, country: 'Magadan', tz: 'Asia/Magadan'},
{id: 63, country: 'Sakhalin', tz: 'Asia/Sakhalin'},
{id: 64, country: 'Srednekolymsk', tz: 'Asia/Srednekolymsk'},
{id: 65, country: 'Kamchatka', tz: 'Asia/Kamchatka'},
{id: 66, country: 'Anadyr', tz: 'Asia/Anadyr'},
{id: 67, country: 'Bangkok', tz: 'Asia/Bangkok'},
{id: 68, country: 'Dushanbe', tz: 'Asia/Dushanbe'},
{id: 69, country: 'Taipei', tz: 'Asia/Taipei'},
{id: 70, country: 'Dili', tz: 'Asia/Dili'},
{id: 71, country: 'Ashgabat', tz: 'Asia/Ashgabat'},
{id: 72, country: 'Damascus', tz: 'Asia/Damascus'},
{id: 73, country: 'Riyadh', tz: 'Asia/Riyadh'},
{id: 74, country: 'Samarkand', tz: 'Asia/Samarkand'},
{id: 75, country: 'Tashkent', tz: 'Asia/Tashkent'},
{id: 76, country: 'Ho_Chi_Minh', tz: 'Asia/Ho_Chi_Minh'},
],
},
{
id: 2,
continent: 'Europe',
newRow: [
{id: 1, country: 'Andorra', tz: 'Europe/Andorra'},
{id: 2, country: 'Tirane', tz: 'Europe/Tirane'},
{id: 3, country: 'Vienna', tz: 'Europe/Vienna'},
{id: 4, country: 'Brussels', tz: 'Europe/Brussels'},
{id: 5, country: 'Sofia', tz: 'Europe/Sofia'},
{id: 6, country: 'Minsk', tz: 'Europe/Minsk'},
{id: 7, country: 'Zurich', tz: 'Europe/Zurich'},
{id: 8, country: 'Prague', tz: 'Europe/Prague'},
{id: 9, country: 'Berlin', tz: 'Europe/Berlin'},
{id: 10, country: 'Copenhagen', tz: 'Europe/Copenhagen'},
{id: 11, country: 'Tallinn', tz: 'Europe/Tallinn'},
{id: 12, country: 'Madrid', tz: 'Europe/Madrid'},
{id: 13, country: 'Helsinki', tz: 'Europe/Helsinki'},
{id: 14, country: 'Paris', tz: 'Europe/Paris'},
{id: 15, country: 'London', tz: 'Europe/London'},
{id: 16, country: 'Gibraltar', tz: 'Europe/Gibraltar'},
{id: 17, country: 'Athens', tz: 'Europe/Athens'},
{id: 18, country: 'Budapest', tz: 'Europe/Budapest'},
{id: 19, country: 'Dublin', tz: 'Europe/Dublin'},
{id: 20, country: 'Rome', tz: 'Europe/Rome'},
{id: 21, country: 'Vilnius', tz: 'Europe/Vilnius'},
{id: 22, country: 'Luxembourg', tz: 'Europe/Luxembourg'},
{id: 23, country: 'Riga', tz: 'Europe/Riga'},
{id: 24, country: 'Monaco', tz: 'Europe/Monaco'},
{id: 25, country: 'Chisinau', tz: 'Europe/Chisinau'},
{id: 26, country: 'Malta', tz: 'Europe/Malta'},
{id: 27, country: 'Amsterdam', tz: 'Europe/Amsterdam'},
{id: 28, country: 'Oslo', tz: 'Europe/Oslo'},
{id: 29, country: 'Warsaw', tz: 'Europe/Warsaw'},
{id: 30, country: 'Warsaw', tz: 'Europe/Warsaw'},
{id: 31, country: 'Lisbon', tz: 'Europe/Lisbon'},
{id: 32, country: 'Bucharest', tz: 'Europe/Bucharest'},
{id: 33, country: 'Belgrade', tz: 'Europe/Belgrade'},
{id: 34, country: 'Kaliningrad', tz: 'Europe/Kaliningrad'},
{id: 35, country: 'Moscow', tz: 'Europe/Moscow'},
{id: 36, country: 'Simferopol', tz: 'Europe/Simferopol'},
{id: 37, country: 'Kirov', tz: 'Europe/Kirov'},
{id: 38, country: 'Astrakhan', tz: 'Europe/Astrakhan'},
{id: 39, country: 'Volgograd', tz: 'Europe/Volgograd'},
{id: 40, country: 'Saratov', tz: 'Europe/Saratov'},
{id: 41, country: 'Ulyanovsk', tz: 'Europe/Ulyanovsk'},
{id: 42, country: 'Samara', tz: 'Europe/Samara'},
{id: 43, country: 'Stockholm', tz: 'Europe/Stockholm'},
{id: 44, country: 'Istanbul', tz: 'Europe/Istanbul'},
{id: 45, country: 'Kiev', tz: 'Europe/Kiev'},
{id: 46, country: 'Uzhgorod', tz: 'Europe/Uzhgorod'},
{id: 47, country: 'Zaporozhye', tz: 'Europe/Zaporozhye'},
],
},
{
id: 3,
continent: 'Antarctica',
newRow: [
{id: 1, country: 'Casey', tz: 'Antarctica/Casey'},
{id: 2, country: 'Davis', tz: 'Antarctica/Davis'},
{id: 3, country: 'DumontDUrville', tz: 'Antarctica/DumontDUrville'},
{id: 4, country: 'Mawson', tz: 'Antarctica/Mawson'},
{id: 5, country: 'Palmer', tz: 'Antarctica/Palmer'},
{id: 6, country: 'Rothera', tz: 'Antarctica/Rothera'},
{id: 7, country: 'Syowa', tz: 'Antarctica/Syowa'},
{id: 8, country: 'Troll', tz: 'Antarctica/Troll'},
{id: 9, country: 'Vostok', tz: 'Antarctica/Vostok'},
{id: 10, country: 'Macquarie', tz: 'Antarctica/Macquarie'},
],
},
{
id: 4,
continent: 'America',
newRow: [
{id: 1, country: 'Buenos_Aires', tz: 'America/Argentina/Buenos_Aires'},
{id: 2, country: 'Cordoba', tz: 'America/Argentina/Cordoba'},
{id: 3, country: 'Salta', tz: 'America/Argentina/Salta'},
{id: 4, country: 'Jujuy', tz: 'America/Argentina/Jujuy'},
{id: 5, country: 'Tucuman', tz: 'America/Argentina/Tucuman'},
{id: 6, country: 'Catamarca', tz: 'America/Argentina/Catamarca'},
{id: 7, country: 'La_Rioja', tz: 'America/Argentina/La_Rioja'},
{id: 8, country: 'San_Juan', tz: 'America/Argentina/San_Juan'},
{id: 9, country: 'Mendoza', tz: 'America/Argentina/Mendoza'},
{id: 10, country: 'San_Luis', tz: 'America/Argentina/San_Luis'},
{id: 11, country: 'Rio_Gallegos', tz: 'America/Argentina/Rio_Gallegos'},
{id: 12, country: 'Ushuaia', tz: 'America/Argentina/Ushuaia'},
{id: 13, country: 'Barbados', tz: 'America/Barbados'},
{id: 14, country: 'La_Paz', tz: 'America/La_Paz'},
{id: 15, country: 'Belem', tz: 'America/Belem'},
{id: 16, country: 'Fortaleza', tz: 'America/Fortaleza'},
{id: 17, country: 'Recife', tz: 'America/Recife'},
{id: 18, country: 'Araguaina', tz: 'America/Araguaina'},
{id: 19, country: 'Maceio', tz: 'America/Maceio'},
{id: 20, country: 'Bahia', tz: 'America/Bahia'},
{id: 21, country: 'Sao_Paulo', tz: 'America/Sao_Paulo'},
{id: 22, country: 'Campo_Grande', tz: 'America/Campo_Grande'},
{id: 23, country: 'Cuiaba', tz: 'America/Cuiaba'},
{id: 24, country: 'Porto_Velho', tz: 'America/Porto_Velho'},
{id: 25, country: 'Boa_Vista', tz: 'America/Boa_Vista'},
{id: 26, country: 'Manaus', tz: 'America/Manaus'},
{id: 27, country: 'Eirunepe', tz: 'America/Eirunepe'},
{id: 28, country: 'Rio_Branco', tz: 'America/Rio_Branco'},
{id: 29, country: 'Nassau', tz: 'America/Nassau'},
{id: 30, country: 'Belize', tz: 'America/Belize'},
{id: 31, country: 'St_Johns', tz: 'America/St_Johns'},
{id: 32, country: 'Halifax', tz: 'America/Halifax'},
{id: 33, country: 'Glace_Bay', tz: 'America/Glace_Bay'},
{id: 34, country: 'Moncton', tz: 'America/Moncton'},
{id: 35, country: 'Goose_Bay', tz: 'America/Goose_Bay'},
{id: 36, country: 'Blanc-Sablon', tz: 'America/Blanc-Sablon'},
{id: 37, country: 'Toronto', tz: 'America/Toronto'},
{id: 38, country: 'Nipigon', tz: 'America/Nipigon'},
{id: 39, country: 'Thunder_Bay', tz: 'America/Thunder_Bay'},
{id: 40, country: 'Iqaluit', tz: 'America/Iqaluit'},
{id: 41, country: 'Pangnirtung', tz: 'America/Pangnirtung'},
{id: 42, country: 'Atikokan', tz: 'America/Atikokan'},
{id: 43, country: 'Winnipeg', tz: 'America/Winnipeg'},
{id: 44, country: 'Rainy_River', tz: 'America/Rainy_River'},
{id: 45, country: 'Resolute', tz: 'America/Resolute'},
{id: 46, country: 'Rankin_Inlet', tz: 'America/Rankin_Inlet'},
{id: 47, country: 'Regina', tz: 'America/Regina'},
{id: 48, country: 'Swift_Current', tz: 'America/Swift_Current'},
{id: 49, country: 'Edmonton', tz: 'America/Edmonton'},
{id: 50, country: 'Cambridge_Bay', tz: 'America/Cambridge_Bay'},
{id: 51, country: 'Yellowknife', tz: 'America/Yellowknife'},
{id: 52, country: 'Inuvik', tz: 'America/Inuvik'},
{id: 53, country: 'Creston', tz: 'America/Creston'},
{id: 54, country: 'Dawson_Creek', tz: 'America/Dawson_Creek'},
{id: 55, country: 'Fort_Nelson', tz: 'America/Fort_Nelson'},
{id: 56, country: 'Vancouver', tz: 'America/Vancouver'},
{id: 57, country: 'Whitehorse', tz: 'America/Whitehorse'},
{id: 58, country: 'Dawson', tz: 'America/Dawson'},
{id: 59, country: 'Santiago', tz: 'America/Santiago'},
{id: 60, country: 'Punta_Arenas', tz: 'America/Punta_Arenas'},
{id: 61, country: 'Bogota', tz: 'America/Bogota'},
{id: 62, country: 'Costa_Rica', tz: 'America/Costa_Rica'},
{id: 63, country: 'Havana', tz: 'America/Havana'},
{id: 64, country: 'Curacao', tz: 'America/Curacao'},
{id: 65, country: 'Santo_Domingo', tz: 'America/Santo_Domingo'},
{id: 66, country: 'Guayaquil', tz: 'America/Guayaquil'},
{id: 67, country: 'Cayenne', tz: 'America/Cayenne'},
{id: 68, country: 'Godthab', tz: 'America/Godthab'},
{id: 69, country: 'Danmarkshavn', tz: 'America/Danmarkshavn'},
{id: 70, country: 'Scoresbysund', tz: 'America/Scoresbysund'},
{id: 71, country: 'Cayenne', tz: 'America/Cayenne'},
{id: 72, country: 'Godthab', tz: 'America/Godthab'},
{id: 73, country: 'Danmarkshavn', tz: 'America/Danmarkshavn'},
{id: 74, country: 'Scoresbysund', tz: 'America/Scoresbysund'},
{id: 75, country: 'Thule', tz: 'America/Thule'},
{id: 76, country: 'Guatemala', tz: 'America/Guatemala'},
{id: 77, country: 'Guyana', tz: 'America/Guyana'},
{id: 78, country: 'Tegucigalpa', tz: 'America/Tegucigalpa'},
{id: 79, country: 'Port-au-Prince', tz: 'America/Port-au-Prince'},
{id: 80, country: 'Jamaica', tz: 'America/Jamaica'},
{id: 81, country: 'Martinique', tz: 'America/Martinique'},
{id: 82, country: 'Mexico_City', tz: 'America/Mexico_City'},
{id: 83, country: 'Cancun', tz: 'America/Cancun'},
{id: 84, country: 'Merida', tz: 'America/Merida'},
{id: 85, country: 'Monterrey', tz: 'America/Monterrey'},
{id: 86, country: 'Matamoros', tz: 'America/Matamoros'},
{id: 87, country: 'Caracas', tz: 'America/Caracas'},
{id: 88, country: 'Mazatlan', tz: 'America/Mazatlan'},
{id: 89, country: 'Chihuahua', tz: 'America/Chihuahua'},
{id: 90, country: 'Ojinaga', tz: 'America/Ojinaga'},
{id: 91, country: 'Hermosillo', tz: 'America/Hermosillo'},
{id: 92, country: 'Tijuana', tz: 'America/Tijuana'},
{id: 93, country: 'Bahia_Banderas', tz: 'America/Bahia_Banderas'},
{id: 94, country: 'Managua', tz: 'America/Managua'},
{id: 95, country: 'Panama', tz: 'America/Panama'},
{id: 96, country: 'Lima', tz: 'America/Lima'},
{id: 97, country: 'Miquelon', tz: 'America/Miquelon'},
{id: 98, country: 'Puerto_Rico', tz: 'America/Puerto_Rico'},
{id: 99, country: 'El_Salvador', tz: 'America/El_Salvador'},
{id: 100, country: 'Grand_Turk', tz: 'America/Grand_Turk'},
{id: 101, country: 'Paramaribo', tz: 'America/Paramaribo'},
{id: 102, country: 'Asuncion', tz: 'America/Asuncion'},
{id: 103, country: 'Port_of_Spain', tz: 'America/Port_of_Spain'},
{id: 104, country: 'New_York', tz: 'America/New_York'},
{id: 105, country: 'Detroit', tz: 'America/Detroit'},
{id: 106, country: 'Louisville', tz: 'America/Kentucky/Louisville'},
{id: 107, country: 'Monticello', tz: 'America/Kentucky/Monticello'},
{id: 108, country: 'Indianapolis', tz: 'America/Indiana/Indianapolis'},
{id: 109, country: 'Vincennes', tz: 'America/Indiana/Vincennes'},
{id: 110, country: 'Winamac', tz: 'America/Indiana/Winamac'},
{id: 111, country: 'Marengo', tz: 'America/Indiana/Marengo'},
{id: 112, country: 'Petersburg', tz: 'America/Indiana/Petersburg'},
{id: 113, country: 'Vevay', tz: 'America/Indiana/Vevay'},
{id: 114, country: 'Tell_City', tz: 'America/Indiana/Tell_City'},
{id: 115, country: 'Knox', tz: 'America/Indiana/Knox'},
{id: 116, country: 'Chicago', tz: 'America/Chicago'},
{id: 117, country: 'Menominee', tz: 'America/Menominee'},
{id: 118, country: 'Denver', tz: 'America/Denver'},
{id: 119, country: 'Boise', tz: 'America/Boise'},
{id: 120, country: 'Phoenix', tz: 'America/Phoenix'},
{id: 121, country: 'Center', tz: 'America/North_Dakota/Center'},
{id: 122, country: 'New_Salem', tz: 'America/North_Dakota/New_Salem'},
{id: 123, country: 'Beulah', tz: 'America/North_Dakota/Beulah'},
{id: 124, country: 'Los_Angeles', tz: 'America/Los_Angeles'},
{id: 125, country: 'Anchorage', tz: 'America/Anchorage'},
{id: 126, country: 'Juneau', tz: 'America/Juneau'},
{id: 127, country: 'Sitka', tz: 'America/Sitka'},
{id: 128, country: 'Metlakatla', tz: 'America/Metlakatla'},
{id: 129, country: 'Yakutat', tz: 'America/Yakutat'},
{id: 130, country: 'Nome', tz: 'America/Nome'},
{id: 131, country: 'Adak', tz: 'America/Adak'},
{id: 132, country: 'Montevideo', tz: 'America/Montevideo'},
],
},
{
id: 5,
continent: 'Pacific',
newRow: [
{id: 1, country: 'Pago_Pago', tz: 'Pacific/Pago_Pago'},
{id: 2, country: 'Rarotonga', tz: 'Pacific/Rarotonga'},
{id: 3, country: 'Easter', tz: 'Pacific/Easter'},
{id: 4, country: 'Galapagos', tz: 'Pacific/Galapagos'},
{id: 5, country: 'Fiji', tz: 'Pacific/Fiji'},
{id: 6, country: 'Chuuk', tz: 'Pacific/Chuuk'},
{id: 7, country: 'Pohnpei', tz: 'Pacific/Pohnpei'},
{id: 8, country: 'Kosrae', tz: 'Pacific/Kosrae'},
{id: 9, country: 'Guam', tz: 'Pacific/Guam'},
{id: 10, country: 'Majuro', tz: 'Pacific/Majuro'},
{id: 11, country: 'Kwajalein', tz: 'Pacific/Kwajalein'},
{id: 12, country: 'Tarawa', tz: 'Pacific/Tarawa'},
{id: 13, country: 'Enderbury', tz: 'Pacific/Enderbury'},
{id: 14, country: 'Kiritimati', tz: 'Pacific/Kiritimati'},
{id: 15, country: 'Noumea', tz: 'Pacific/Noumea'},
{id: 16, country: 'Norfolk', tz: 'Pacific/Norfolk'},
{id: 17, country: 'Nauru', tz: 'Pacific/Nauru'},
{id: 18, country: 'Niue', tz: 'Pacific/Niue'},
{id: 19, country: 'Auckland', tz: 'Pacific/Auckland'},
{id: 20, country: 'Chatham', tz: 'Pacific/Chatham'},
{id: 21, country: 'Tahiti', tz: 'Pacific/Tahiti'},
{id: 22, country: 'Marquesas', tz: 'Pacific/Marquesas'},
{id: 23, country: 'Gambier', tz: 'Pacific/Gambier'},
{id: 24, country: 'Port_Moresby', tz: 'Pacific/Port_Moresby'},
{id: 25, country: 'Bougainville', tz: 'Pacific/Bougainville'},
{id: 26, country: 'Pitcairn', tz: 'Pacific/Pitcairn'},
{id: 27, country: 'Palau', tz: 'Pacific/Palau'},
{id: 28, country: 'Guadalcanal', tz: 'Pacific/Guadalcanal'},
{id: 29, country: 'Fakaofo', tz: 'Pacific/Fakaofo'},
{id: 30, country: 'Tongatapu', tz: 'Pacific/Tongatapu'},
{id: 31, country: 'Funafuti', tz: 'Pacific/Funafuti'},
{id: 32, country: 'Wake', tz: 'Pacific/Wake'},
{id: 33, country: 'Honolulu', tz: 'Pacific/Honolulu'},
{id: 34, country: 'Efate', tz: 'Pacific/Efate'},
{id: 35, country: 'Wallis', tz: 'Pacific/Wallis'},
{id: 36, country: 'Apia', tz: 'Pacific/Apia'},
],
},
{
id: 6,
continent: 'Australia',
newRow: [
{id: 1, country: 'Lord_Howe', tz: 'Australia/Lord_Howe'},
{id: 2, country: 'Hobart', tz: 'Australia/Hobart'},
{id: 3, country: 'Currie', tz: 'Australia/Currie'},
{id: 4, country: 'Melbourne', tz: 'Australia/Melbourne'},
{id: 5, country: 'Sydney', tz: 'Australia/Sydney'},
{id: 6, country: 'Broken_Hill', tz: 'Australia/Broken_Hill'},
{id: 7, country: 'Brisbane', tz: 'Australia/Brisbane'},
{id: 8, country: 'Lindeman', tz: 'Australia/Lindeman'},
{id: 9, country: 'Adelaide', tz: 'Australia/Adelaide'},
{id: 10, country: 'Darwin', tz: 'Australia/Darwin'},
{id: 11, country: 'Perth', tz: 'Australia/Perth'},
{id: 12, country: 'Eucla', tz: 'Australia/Eucla'},
],
},
{
id: 7,
continent: 'Africa',
newRow: [
{id: 1, country: 'Abidjan', tz: 'Africa/Abidjan'},
{id: 2, country: 'Algiers', tz: 'Africa/Algiers'},
{id: 3, country: 'Cairo', tz: 'Africa/Cairo'},
{id: 4, country: 'El_Aaiun', tz: 'Africa/El_Aaiun'},
{id: 5, country: 'Ceuta', tz: 'Africa/Ceuta'},
{id: 6, country: 'Accra', tz: 'Africa/Accra'},
{id: 7, country: 'Bissau', tz: 'Africa/Bissau'},
{id: 8, country: 'Nairobi', tz: 'Africa/Nairobi'},
{id: 9, country: 'Monrovia', tz: 'Africa/Monrovia'},
{id: 10, country: 'Tripoli', tz: 'Africa/Tripoli'},
{id: 11, country: 'Casablanca', tz: 'Africa/Casablanca'},
{id: 12, country: 'Maputo', tz: 'Africa/Maputo'},
{id: 13, country: 'Windhoek', tz: 'Africa/Windhoek'},
{id: 14, country: 'Lagos', tz: 'Africa/Lagos'},
{id: 15, country: 'Khartoum', tz: 'Africa/Khartoum'},
{id: 16, country: 'Juba', tz: 'Africa/Juba'},
{id: 17, country: 'Sao_Tome', tz: 'Africa/Sao_Tome'},
{id: 18, country: 'Ndjamena', tz: 'Africa/Ndjamena'},
{id: 19, country: 'Tunis', tz: 'Africa/Tunis'},
{id: 20, country: 'Johannesburg', tz: 'Africa/Johannesburg'},
],
},
{
id: 8,
continent: 'Atlantic',
newRow: [
{id: 1, country: 'Azores', tz: 'Atlantic/Azores'},
{id: 2, country: 'Bermuda', tz: 'Atlantic/Bermuda'},
{id: 3, country: 'Madeira', tz: 'Atlantic/Madeira'},
],
},
{
id: 9,
continent: 'Atlantic',
newRow: [
{id: 1, country: 'Cape_Verde', tz: 'Atlantic/Cape_Verde'},
{id: 2, country: 'Canary', tz: 'Atlantic/Canary'},
{id: 3, country: 'Stanley', tz: 'Atlantic/Stanley'},
{id: 4, country: 'Faroe', tz: 'Atlantic/Faroe'},
{id: 5, country: 'South_Georgia', tz: 'Atlantic/South_Georgia'},
{id: 6, country: 'Reykjavik', tz: 'Atlantic/Reykjavik'},
],
},
{
id: 10,
continent: 'Indian',
newRow: [
{id: 1, country: 'Cocos', tz: 'Indian/Cocos'},
{id: 2, country: 'Christmas', tz: 'Indian/Christmas'},
{id: 3, country: 'Chagos', tz: 'Indian/Chagos'},
{id: 4, country: 'Mauritius', tz: 'Indian/Mauritius'},
{id: 5, country: 'Maldives', tz: 'Indian/Maldives'},
{id: 6, country: 'Mahe', tz: 'Indian/Mahe'},
{id: 7, country: 'Reunion', tz: 'Indian/Reunion'},
{id: 8, country: 'Kerguelen', tz: 'Indian/Kerguelen'},
],
},
];
Solution 6 - Javascript
The react-intl library's time zone functionality is provided exclusively by the ECMAScript Internationalization API features that are integrated into the browser.
While IANA time zone support is part of this spec, it currently only covers two scenarios:
-
Formating a
Dateobject to a string, converting to a specific time zone in the process. -
Determining the user's local time zone identifier.
Unfortunately, there is no function defined by the spec for enumerating the list of available time zones.
Additionally, note that support for the two functions it does have is currently limited to a handful of browsers. It will likely be quite some time before these capabilities can be depended upon. The ECMAScript Compatibility Table shows which browsers are supported. Under DateTimeFormat you'll find "resolvedOptions().timeZone defaults to the host environment" and "accepts IANA timezone names" that track these features.
Solution 7 - Javascript
The API in Vanilla JavaScript for retrieving a list of all supported timezones:
Intl.supportedValuesOf('timeZone')
Browser/Language Support:
- Chrome 99 (v8 9.9)
- Firefox 93
- Safari 15.4
- Edge 99
- Node.js 18.0.0 (v8 10.1)
To try it in Stack Overflow:
let select = document.querySelector('select');
if (!Intl.supportedValuesOf) {
let opt = new Option('Your browser does not support Intl.supportedValuesOf().', null, true, true);
opt.disabled = true;
select.options.add(opt);
} else {
for (const timeZone of Intl.supportedValuesOf('timeZone')) {
select.options.add(new Option(timeZone));
}
}
<select style="min-width: 20ch">
Solution 8 - Javascript
The marked answer doesn't seem to work for the Pacific/Honolulu timezone.
I've made another function that worked for that:
function getTimezoneOffset(timeZone) {
const now = new Date();
const tzString = now.toLocaleString('en-US', { timeZone });
const localString = now.toLocaleString('en-US');
const diff = (Date.parse(localString) - Date.parse(tzString)) / 3600000;
const offset = diff + now.getTimezoneOffset() / 60;
return -offset;
}
Usage example:
const offset = getTimezoneOffset('Pacific/Honolulu');
console.log(offset); // output: -10
Solution 9 - Javascript
I realize my answer is late, but if you are using Intl and you care about time zones, and you're facing the web, then you are almost certainly going to need https://github.com/yahoo/date-time-format-timezone. Since you will have this in your project anyway, you can retrieve the time zone data from inside the polyfill even if you're not using the polyfill.
Everyone is using the IANA database so you should get consistent results.
Solution 10 - Javascript
I realize my answer is late, but I just created a package about this
https://github.com/UltiRequiem/timezones
Supports
- Node.js
https://www.npmjs.com/package/@ultirequiem/timezones
- Deno
- Browser
https://github.com/UltiRequiem/timezones#browser
Page https://timezones.js.org
Solution 11 - Javascript
In react there re multiple ways to do so, but you can get all timezone using countries-and-timezones library.
first import the library:
import TimezoneCountries from "countries-and-timezones";
after importing, paste below code snippet to get list of all timezones.
export function getAllTimezones() {
const allTimezones = Object.values(
TimezoneCountries.getAllTimezones({ deprecated: true })
).map((list) => ({
value: list.name,
label: `${list.name}`,
}));
return allTimezones;
}
you can also get country name and utc offset by adding following lines
list.countries //to get country names in which timezone is used
list.utcOffsetStr //to get UTC offset
read more about library here.
Solution 12 - Javascript
Just for timezone list, adding a big package like moment is not recommended. Adding moment package will increase your application size and will slow down your application performance. Here is the latest timezones array
[ "Africa/Abidjan", "Africa/Accra", "Africa/Addis_Ababa", "Africa/Algiers", "Africa/Asmara", "Africa/Asmera", "Africa/Bamako", "Africa/Bangui", "Africa/Banjul", "Africa/Bissau", "Africa/Blantyre", "Africa/Brazzaville", "Africa/Bujumbura", "Africa/Cairo", "Africa/Casablanca", "Africa/Ceuta", "Africa/Conakry", "Africa/Dakar", "Africa/Dar_es_Salaam", "Africa/Djibouti", "Africa/Douala", "Africa/El_Aaiun", "Africa/Freetown", "Africa/Gaborone", "Africa/Harare", "Africa/Johannesburg", "Africa/Juba", "Africa/Kampala", "Africa/Khartoum", "Africa/Kigali", "Africa/Kinshasa", "Africa/Lagos", "Africa/Libreville", "Africa/Lome", "Africa/Luanda", "Africa/Lubumbashi", "Africa/Lusaka", "Africa/Malabo", "Africa/Maputo", "Africa/Maseru", "Africa/Mbabane", "Africa/Mogadishu", "Africa/Monrovia", "Africa/Nairobi", "Africa/Ndjamena", "Africa/Niamey", "Africa/Nouakchott", "Africa/Ouagadougou", "Africa/Porto-Novo", "Africa/Sao_Tome", "Africa/Timbuktu", "Africa/Tripoli", "Africa/Tunis", "Africa/Windhoek", "America/Adak", "America/Anchorage", "America/Anguilla", "America/Antigua", "America/Araguaina", "America/Argentina/Buenos_Aires", "America/Argentina/Catamarca", "America/Argentina/ComodRivadavia", "America/Argentina/Cordoba", "America/Argentina/Jujuy", "America/Argentina/La_Rioja", "America/Argentina/Mendoza", "America/Argentina/Rio_Gallegos", "America/Argentina/Salta", "America/Argentina/San_Juan", "America/Argentina/San_Luis", "America/Argentina/Tucuman", "America/Argentina/Ushuaia", "America/Aruba", "America/Asuncion", "America/Atikokan", "America/Atka", "America/Bahia", "America/Bahia_Banderas", "America/Barbados", "America/Belem", "America/Belize", "America/Blanc-Sablon", "America/Boa_Vista", "America/Bogota", "America/Boise", "America/Buenos_Aires", "America/Cambridge_Bay", "America/Campo_Grande", "America/Cancun", "America/Caracas", "America/Catamarca", "America/Cayenne", "America/Cayman", "America/Chicago", "America/Chihuahua", "America/Coral_Harbour", "America/Cordoba", "America/Costa_Rica", "America/Creston", "America/Cuiaba", "America/Curacao", "America/Danmarkshavn", "America/Dawson", "America/Dawson_Creek", "America/Denver", "America/Detroit", "America/Dominica", "America/Edmonton", "America/Eirunepe", "America/El_Salvador", "America/Ensenada", "America/Fort_Nelson", "America/Fort_Wayne", "America/Fortaleza", "America/Glace_Bay", "America/Godthab", "America/Goose_Bay", "America/Grand_Turk", "America/Grenada", "America/Guadeloupe", "America/Guatemala", "America/Guayaquil", "America/Guyana", "America/Halifax", "America/Havana", "America/Hermosillo", "America/Indiana/Indianapolis", "America/Indiana/Knox", "America/Indiana/Marengo", "America/Indiana/Petersburg", "America/Indiana/Tell_City", "America/Indiana/Vevay", "America/Indiana/Vincennes", "America/Indiana/Winamac", "America/Indianapolis", "America/Inuvik", "America/Iqaluit", "America/Jamaica", "America/Jujuy", "America/Juneau", "America/Kentucky/Louisville", "America/Kentucky/Monticello", "America/Knox_IN", "America/Kralendijk", "America/La_Paz", "America/Lima", "America/Los_Angeles", "America/Louisville", "America/Lower_Princes", "America/Maceio", "America/Managua", "America/Manaus", "America/Marigot", "America/Martinique", "America/Matamoros", "America/Mazatlan", "America/Mendoza", "America/Menominee", "America/Merida", "America/Metlakatla", "America/Mexico_City", "America/Miquelon", "America/Moncton", "America/Monterrey", "America/Montevideo", "America/Montreal", "America/Montserrat", "America/Nassau", "America/New_York", "America/Nipigon", "America/Nome", "America/Noronha", "America/North_Dakota/Beulah", "America/North_Dakota/Center", "America/North_Dakota/New_Salem", "America/Nuuk", "America/Ojinaga", "America/Panama", "America/Pangnirtung", "America/Paramaribo", "America/Phoenix", "America/Port-au-Prince", "America/Port_of_Spain", "America/Porto_Acre", "America/Porto_Velho", "America/Puerto_Rico", "America/Punta_Arenas", "America/Rainy_River", "America/Rankin_Inlet", "America/Recife", "America/Regina", "America/Resolute", "America/Rio_Branco", "America/Rosario", "America/Santa_Isabel", "America/Santarem", "America/Santiago", "America/Santo_Domingo", "America/Sao_Paulo", "America/Scoresbysund", "America/Shiprock", "America/Sitka", "America/St_Barthelemy", "America/St_Johns", "America/St_Kitts", "America/St_Lucia", "America/St_Thomas", "America/St_Vincent", "America/Swift_Current", "America/Tegucigalpa", "America/Thule", "America/Thunder_Bay", "America/Tijuana", "America/Toronto", "America/Tortola", "America/Vancouver", "America/Virgin", "America/Whitehorse", "America/Winnipeg", "America/Yakutat", "America/Yellowknife", "Antarctica/Casey", "Antarctica/Davis", "Antarctica/DumontDUrville", "Antarctica/Macquarie", "Antarctica/Mawson", "Antarctica/McMurdo", "Antarctica/Palmer", "Antarctica/Rothera", "Antarctica/South_Pole", "Antarctica/Syowa", "Antarctica/Troll", "Antarctica/Vostok", "Arctic/Longyearbyen", "Asia/Aden", "Asia/Almaty", "Asia/Amman", "Asia/Anadyr", "Asia/Aqtau", "Asia/Aqtobe", "Asia/Ashgabat", "Asia/Ashkhabad", "Asia/Atyrau", "Asia/Baghdad", "Asia/Bahrain", "Asia/Baku", "Asia/Bangkok", "Asia/Barnaul", "Asia/Beirut", "Asia/Bishkek", "Asia/Brunei", "Asia/Calcutta", "Asia/Chita", "Asia/Choibalsan", "Asia/Chongqing", "Asia/Chungking", "Asia/Colombo", "Asia/Dacca", "Asia/Damascus", "Asia/Dhaka", "Asia/Dili", "Asia/Dubai", "Asia/Dushanbe", "Asia/Famagusta", "Asia/Gaza", "Asia/Harbin", "Asia/Hebron", "Asia/Ho_Chi_Minh", "Asia/Hong_Kong", "Asia/Hovd", "Asia/Irkutsk", "Asia/Istanbul", "Asia/Jakarta", "Asia/Jayapura", "Asia/Jerusalem", "Asia/Kabul", "Asia/Kamchatka", "Asia/Karachi", "Asia/Kashgar", "Asia/Kathmandu", "Asia/Katmandu", "Asia/Khandyga", "Asia/Kolkata", "Asia/Krasnoyarsk", "Asia/Kuala_Lumpur", "Asia/Kuching", "Asia/Kuwait", "Asia/Macao", "Asia/Macau", "Asia/Magadan", "Asia/Makassar", "Asia/Manila", "Asia/Muscat", "Asia/Nicosia", "Asia/Novokuznetsk", "Asia/Novosibirsk", "Asia/Omsk", "Asia/Oral", "Asia/Phnom_Penh", "Asia/Pontianak", "Asia/Pyongyang", "Asia/Qatar", "Asia/Qostanay", "Asia/Qyzylorda", "Asia/Rangoon", "Asia/Riyadh", "Asia/Saigon", "Asia/Sakhalin", "Asia/Samarkand", "Asia/Seoul", "Asia/Shanghai", "Asia/Singapore", "Asia/Srednekolymsk", "Asia/Taipei", "Asia/Tashkent", "Asia/Tbilisi", "Asia/Tehran", "Asia/Tel_Aviv", "Asia/Thimbu", "Asia/Thimphu", "Asia/Tokyo", "Asia/Tomsk", "Asia/Ujung_Pandang", "Asia/Ulaanbaatar", "Asia/Ulan_Bator", "Asia/Urumqi", "Asia/Ust-Nera", "Asia/Vientiane", "Asia/Vladivostok", "Asia/Yakutsk", "Asia/Yangon", "Asia/Yekaterinburg", "Asia/Yerevan", "Atlantic/Azores", "Atlantic/Bermuda", "Atlantic/Canary", "Atlantic/Cape_Verde", "Atlantic/Faeroe", "Atlantic/Faroe", "Atlantic/Jan_Mayen", "Atlantic/Madeira", "Atlantic/Reykjavik", "Atlantic/South_Georgia", "Atlantic/St_Helena", "Atlantic/Stanley", "Australia/ACT", "Australia/Adelaide", "Australia/Brisbane", "Australia/Broken_Hill", "Australia/Canberra", "Australia/Currie", "Australia/Darwin", "Australia/Eucla", "Australia/Hobart", "Australia/LHI", "Australia/Lindeman", "Australia/Lord_Howe", "Australia/Melbourne", "Australia/NSW", "Australia/North", "Australia/Perth", "Australia/Queensland", "Australia/South", "Australia/Sydney", "Australia/Tasmania", "Australia/Victoria", "Australia/West", "Australia/Yancowinna", "Brazil/Acre", "Brazil/DeNoronha", "Brazil/East", "Brazil/West", "CET", "CST6CDT", "Canada/Atlantic", "Canada/Central", "Canada/Eastern", "Canada/Mountain", "Canada/Newfoundland", "Canada/Pacific", "Canada/Saskatchewan", "Canada/Yukon", "Chile/Continental", "Chile/EasterIsland", "Cuba", "EET", "EST", "EST5EDT", "Egypt", "Eire", "Etc/GMT", "Etc/GMT+0", "Etc/GMT+1", "Etc/GMT+10", "Etc/GMT+11", "Etc/GMT+12", "Etc/GMT+2", "Etc/GMT+3", "Etc/GMT+4", "Etc/GMT+5", "Etc/GMT+6", "Etc/GMT+7", "Etc/GMT+8", "Etc/GMT+9", "Etc/GMT-0", "Etc/GMT-1", "Etc/GMT-10", "Etc/GMT-11", "Etc/GMT-12", "Etc/GMT-13", "Etc/GMT-14", "Etc/GMT-2", "Etc/GMT-3", "Etc/GMT-4", "Etc/GMT-5", "Etc/GMT-6", "Etc/GMT-7", "Etc/GMT-8", "Etc/GMT-9", "Etc/GMT0", "Etc/Greenwich", "Etc/UCT", "Etc/UTC", "Etc/Universal", "Etc/Zulu", "Europe/Amsterdam", "Europe/Andorra", "Europe/Astrakhan", "Europe/Athens", "Europe/Belfast", "Europe/Belgrade", "Europe/Berlin", "Europe/Bratislava", "Europe/Brussels", "Europe/Bucharest", "Europe/Budapest", "Europe/Busingen", "Europe/Chisinau", "Europe/Copenhagen", "Europe/Dublin", "Europe/Gibraltar", "Europe/Guernsey", "Europe/Helsinki", "Europe/Isle_of_Man", "Europe/Istanbul", "Europe/Jersey", "Europe/Kaliningrad", "Europe/Kiev", "Europe/Kirov", "Europe/Lisbon", "Europe/Ljubljana", "Europe/London", "Europe/Luxembourg", "Europe/Madrid", "Europe/Malta", "Europe/Mariehamn", "Europe/Minsk", "Europe/Monaco", "Europe/Moscow", "Europe/Nicosia", "Europe/Oslo", "Europe/Paris", "Europe/Podgorica", "Europe/Prague", "Europe/Riga", "Europe/Rome", "Europe/Samara", "Europe/San_Marino", "Europe/Sarajevo", "Europe/Saratov", "Europe/Simferopol", "Europe/Skopje", "Europe/Sofia", "Europe/Stockholm", "Europe/Tallinn", "Europe/Tirane", "Europe/Tiraspol", "Europe/Ulyanovsk", "Europe/Uzhgorod", "Europe/Vaduz", "Europe/Vatican", "Europe/Vienna", "Europe/Vilnius", "Europe/Volgograd", "Europe/Warsaw", "Europe/Zagreb", "Europe/Zaporozhye", "Europe/Zurich", "GB", "GB-Eire", "GMT", "GMT+0", "GMT-0", "GMT0", "Greenwich", "HST", "Hongkong", "Iceland", "Indian/Antananarivo", "Indian/Chagos", "Indian/Christmas", "Indian/Cocos", "Indian/Comoro", "Indian/Kerguelen", "Indian/Mahe", "Indian/Maldives", "Indian/Mauritius", "Indian/Mayotte", "Indian/Reunion", "Iran", "Israel", "Jamaica", "Japan", "Kwajalein", "Libya", "MET", "MST", "MST7MDT", "Mexico/BajaNorte", "Mexico/BajaSur", "Mexico/General", "NZ", "NZ-CHAT", "Navajo", "PRC", "PST8PDT", "Pacific/Apia", "Pacific/Auckland", "Pacific/Bougainville", "Pacific/Chatham", "Pacific/Chuuk", "Pacific/Easter", "Pacific/Efate", "Pacific/Enderbury", "Pacific/Fakaofo", "Pacific/Fiji", "Pacific/Funafuti", "Pacific/Galapagos", "Pacific/Gambier", "Pacific/Guadalcanal", "Pacific/Guam", "Pacific/Honolulu", "Pacific/Johnston", "Pacific/Kanton", "Pacific/Kiritimati", "Pacific/Kosrae", "Pacific/Kwajalein", "Pacific/Majuro", "Pacific/Marquesas", "Pacific/Midway", "Pacific/Nauru", "Pacific/Niue", "Pacific/Norfolk", "Pacific/Noumea", "Pacific/Pago_Pago", "Pacific/Palau", "Pacific/Pitcairn", "Pacific/Pohnpei", "Pacific/Ponape", "Pacific/Port_Moresby", "Pacific/Rarotonga", "Pacific/Saipan", "Pacific/Samoa", "Pacific/Tahiti", "Pacific/Tarawa", "Pacific/Tongatapu", "Pacific/Truk", "Pacific/Wake", "Pacific/Wallis", "Pacific/Yap", "Poland", "Portugal", "ROC", "ROK", "Singapore", "Turkey", "UCT", "US/Alaska", "US/Aleutian", "US/Arizona", "US/Central", "US/East-Indiana", "US/Eastern", "US/Hawaii", "US/Indiana-Starke", "US/Michigan", "US/Mountain", "US/Pacific", "US/Samoa", "UTC", "Universal", "W-SU", "WET", "Zulu"]