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timfee/timezones.ts

Last active April 19, 2024 18:51
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Friendly Timezones
Raw
timezones.ts
type TimeZoneInfo = {
friendlyName: string
offsetString: string
offsetNumeric: number
longTimezones: string[]
}
function offsetStringToNumeric(offsetString: string): number {
const sign = offsetString.startsWith("GMT-") ? -1 : 1
const [hours, minutes] = offsetString.slice(4).split(":").map(Number)
return sign * (hours * 60 + minutes) || 0
}
function getTimeZoneInfo(): TimeZoneInfo[] {
const supportedTimeZones = Intl.supportedValuesOf("timeZone")
const timeZoneMap = new Map<string, TimeZoneInfo>()
supportedTimeZones.forEach((tz) => {
const dateTimeFormat = new Intl.DateTimeFormat("en-US", {
timeZone: tz,
timeZoneName: "longGeneric",
})
const offsetFormat = new Intl.DateTimeFormat("en-US", {
timeZone: tz,
timeZoneName: "longOffset",
})
const formattedDate = dateTimeFormat.format(new Date())
const [, friendlyName] = formattedDate.split(", ")
const formattedOffset = offsetFormat.format(new Date())
const [, offsetString] = formattedOffset.split(", ")
const key = `${friendlyName}:${offsetString}`
const offsetNumeric = offsetStringToNumeric(offsetString)
if (timeZoneMap.has(key)) {
timeZoneMap.get(key)!.longTimezones.push(tz)
} else {
timeZoneMap.set(key, {
friendlyName,
offsetString,
offsetNumeric,
longTimezones: [tz],
})
}
})
return [...timeZoneMap.values()]
}
const timeZoneInfoArray = getTimeZoneInfo()
console.log(timeZoneInfoArray)
Raw
ztimezones.json
[
{
"friendlyName": "Greenwich Mean Time",
"offsetString": "GMT",
"offsetNumeric": 0,
"longTimezones": [
"Africa/Abidjan",
"Africa/Accra",
"Africa/Bamako",
"Africa/Banjul",
"Africa/Bissau",
"Africa/Conakry",
"Africa/Dakar",
"Africa/Freetown",
"Africa/Lome",
"Africa/Monrovia",
"Africa/Nouakchott",
"Africa/Ouagadougou",
"Africa/Sao_Tome",
"America/Danmarkshavn",
"Atlantic/Reykjavik",
"Atlantic/St_Helena"
]
},
{
"friendlyName": "East Africa Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Africa/Addis_Ababa",
"Africa/Asmera",
"Africa/Dar_es_Salaam",
"Africa/Djibouti",
"Africa/Kampala",
"Africa/Mogadishu",
"Africa/Nairobi",
"Indian/Antananarivo",
"Indian/Comoro",
"Indian/Mayotte"
]
},
{
"friendlyName": "Central European Standard Time",
"offsetString": "GMT+01:00",
"offsetNumeric": 60,
"longTimezones": [
"Africa/Algiers",
"Africa/Tunis"
]
},
{
"friendlyName": "West Africa Standard Time",
"offsetString": "GMT+01:00",
"offsetNumeric": 60,
"longTimezones": [
"Africa/Bangui",
"Africa/Brazzaville",
"Africa/Douala",
"Africa/Kinshasa",
"Africa/Lagos",
"Africa/Libreville",
"Africa/Luanda",
"Africa/Malabo",
"Africa/Ndjamena",
"Africa/Niamey",
"Africa/Porto-Novo"
]
},
{
"friendlyName": "Central Africa Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Africa/Blantyre",
"Africa/Bujumbura",
"Africa/Gaborone",
"Africa/Harare",
"Africa/Juba",
"Africa/Khartoum",
"Africa/Kigali",
"Africa/Lubumbashi",
"Africa/Lusaka",
"Africa/Maputo",
"Africa/Windhoek"
]
},
{
"friendlyName": "Eastern European Standard Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Africa/Cairo",
"Africa/Tripoli",
"Europe/Kaliningrad"
]
},
{
"friendlyName": "Morocco Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Africa/Casablanca"
]
},
{
"friendlyName": "Central European Time",
"offsetString": "GMT+01:00",
"offsetNumeric": 60,
"longTimezones": [
"Africa/Ceuta",
"Arctic/Longyearbyen",
"Europe/Amsterdam",
"Europe/Andorra",
"Europe/Belgrade",
"Europe/Berlin",
"Europe/Bratislava",
"Europe/Brussels",
"Europe/Budapest",
"Europe/Busingen",
"Europe/Copenhagen",
"Europe/Gibraltar",
"Europe/Ljubljana",
"Europe/Luxembourg",
"Europe/Madrid",
"Europe/Malta",
"Europe/Monaco",
"Europe/Oslo",
"Europe/Paris",
"Europe/Podgorica",
"Europe/Prague",
"Europe/Rome",
"Europe/San_Marino",
"Europe/Sarajevo",
"Europe/Skopje",
"Europe/Stockholm",
"Europe/Tirane",
"Europe/Vaduz",
"Europe/Vatican",
"Europe/Vienna",
"Europe/Warsaw",
"Europe/Zagreb",
"Europe/Zurich"
]
},
{
"friendlyName": "Western Sahara Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Africa/El_Aaiun"
]
},
{
"friendlyName": "South Africa Standard Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Africa/Johannesburg",
"Africa/Maseru",
"Africa/Mbabane"
]
},
{
"friendlyName": "Hawaii-Aleutian Time (Adak)",
"offsetString": "GMT-09:00",
"offsetNumeric": -540,
"longTimezones": [
"America/Adak"
]
},
{
"friendlyName": "Alaska Time",
"offsetString": "GMT-08:00",
"offsetNumeric": -480,
"longTimezones": [
"America/Anchorage",
"America/Juneau",
"America/Metlakatla",
"America/Nome",
"America/Sitka",
"America/Yakutat"
]
},
{
"friendlyName": "Atlantic Standard Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Anguilla",
"America/Antigua",
"America/Aruba",
"America/Barbados",
"America/Blanc-Sablon",
"America/Curacao",
"America/Dominica",
"America/Grenada",
"America/Guadeloupe",
"America/Kralendijk",
"America/Lower_Princes",
"America/Marigot",
"America/Martinique",
"America/Montserrat",
"America/Port_of_Spain",
"America/Puerto_Rico",
"America/Santo_Domingo",
"America/St_Barthelemy",
"America/St_Kitts",
"America/St_Lucia",
"America/St_Thomas",
"America/St_Vincent",
"America/Tortola"
]
},
{
"friendlyName": "Brasilia Standard Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Araguaina",
"America/Bahia",
"America/Belem",
"America/Fortaleza",
"America/Maceio",
"America/Recife",
"America/Santarem",
"America/Sao_Paulo"
]
},
{
"friendlyName": "Argentina Standard Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Argentina/La_Rioja",
"America/Argentina/Rio_Gallegos",
"America/Argentina/Salta",
"America/Argentina/San_Juan",
"America/Argentina/San_Luis",
"America/Argentina/Tucuman",
"America/Argentina/Ushuaia",
"America/Buenos_Aires",
"America/Catamarca",
"America/Cordoba",
"America/Jujuy",
"America/Mendoza"
]
},
{
"friendlyName": "Paraguay Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Asuncion"
]
},
{
"friendlyName": "Central Time (Bahia Banderas)",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Bahia_Banderas"
]
},
{
"friendlyName": "Central Standard Time",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Belize",
"America/Costa_Rica",
"America/El_Salvador",
"America/Guatemala",
"America/Managua",
"America/Regina",
"America/Swift_Current",
"America/Tegucigalpa"
]
},
{
"friendlyName": "Amazon Standard Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Boa_Vista",
"America/Campo_Grande",
"America/Cuiaba",
"America/Manaus",
"America/Porto_Velho"
]
},
{
"friendlyName": "Colombia Standard Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Bogota"
]
},
{
"friendlyName": "Mountain Time",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Boise",
"America/Cambridge_Bay",
"America/Ciudad_Juarez",
"America/Denver",
"America/Edmonton",
"America/Inuvik",
"America/Yellowknife"
]
},
{
"friendlyName": "Eastern Standard Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Cancun",
"America/Cayman",
"America/Coral_Harbour",
"America/Jamaica",
"America/Panama"
]
},
{
"friendlyName": "Venezuela Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Caracas"
]
},
{
"friendlyName": "French Guiana Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Cayenne"
]
},
{
"friendlyName": "Central Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Chicago",
"America/Indiana/Knox",
"America/Indiana/Tell_City",
"America/Matamoros",
"America/Menominee",
"America/North_Dakota/Beulah",
"America/North_Dakota/Center",
"America/North_Dakota/New_Salem",
"America/Ojinaga",
"America/Rainy_River",
"America/Rankin_Inlet",
"America/Resolute",
"America/Winnipeg"
]
},
{
"friendlyName": "Central Time (Chihuahua)",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Chihuahua"
]
},
{
"friendlyName": "Mountain Standard Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Creston",
"America/Dawson_Creek",
"America/Fort_Nelson",
"America/Phoenix"
]
},
{
"friendlyName": "Yukon Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Dawson",
"America/Whitehorse"
]
},
{
"friendlyName": "Eastern Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Detroit",
"America/Grand_Turk",
"America/Indiana/Marengo",
"America/Indiana/Petersburg",
"America/Indiana/Vevay",
"America/Indiana/Vincennes",
"America/Indiana/Winamac",
"America/Indianapolis",
"America/Iqaluit",
"America/Kentucky/Monticello",
"America/Louisville",
"America/Nassau",
"America/New_York",
"America/Nipigon",
"America/Pangnirtung",
"America/Port-au-Prince",
"America/Thunder_Bay",
"America/Toronto"
]
},
{
"friendlyName": "Acre Standard Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Eirunepe",
"America/Rio_Branco"
]
},
{
"friendlyName": "Atlantic Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Glace_Bay",
"America/Goose_Bay",
"America/Halifax",
"America/Moncton",
"America/Thule",
"Atlantic/Bermuda"
]
},
{
"friendlyName": "West Greenland Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Godthab"
]
},
{
"friendlyName": "Ecuador Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Guayaquil"
]
},
{
"friendlyName": "Guyana Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Guyana"
]
},
{
"friendlyName": "Cuba Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Havana"
]
},
{
"friendlyName": "Mexican Pacific Standard Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Hermosillo"
]
},
{
"friendlyName": "Bolivia Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/La_Paz"
]
},
{
"friendlyName": "Peru Standard Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"America/Lima"
]
},
{
"friendlyName": "Pacific Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Los_Angeles",
"America/Tijuana",
"America/Vancouver"
]
},
{
"friendlyName": "Mexican Pacific Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Mazatlan"
]
},
{
"friendlyName": "Central Time (Merida)",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Merida"
]
},
{
"friendlyName": "Central Time (Mexico)",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Mexico_City"
]
},
{
"friendlyName": "St. Pierre & Miquelon Time",
"offsetString": "GMT-02:00",
"offsetNumeric": -120,
"longTimezones": [
"America/Miquelon"
]
},
{
"friendlyName": "Central Time (Monterrey)",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"America/Monterrey"
]
},
{
"friendlyName": "Uruguay Standard Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Montevideo"
]
},
{
"friendlyName": "Montreal Time",
"offsetString": "GMT-04:00",
"offsetNumeric": -240,
"longTimezones": [
"America/Montreal"
]
},
{
"friendlyName": "Fernando de Noronha Standard Time",
"offsetString": "GMT-02:00",
"offsetNumeric": -120,
"longTimezones": [
"America/Noronha"
]
},
{
"friendlyName": "Suriname Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Paramaribo"
]
},
{
"friendlyName": "Punta Arenas Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Punta_Arenas"
]
},
{
"friendlyName": "Northwest Mexico Time",
"offsetString": "GMT-07:00",
"offsetNumeric": -420,
"longTimezones": [
"America/Santa_Isabel"
]
},
{
"friendlyName": "Chile Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"America/Santiago"
]
},
{
"friendlyName": "East Greenland Time",
"offsetString": "GMT-01:00",
"offsetNumeric": -60,
"longTimezones": [
"America/Scoresbysund"
]
},
{
"friendlyName": "Newfoundland Time",
"offsetString": "GMT-02:30",
"offsetNumeric": -150,
"longTimezones": [
"America/St_Johns"
]
},
{
"friendlyName": "Casey Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Antarctica/Casey"
]
},
{
"friendlyName": "Davis Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Antarctica/Davis"
]
},
{
"friendlyName": "Dumont-d’Urville Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Antarctica/DumontDUrville"
]
},
{
"friendlyName": "Eastern Australia Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Antarctica/Macquarie",
"Australia/Currie",
"Australia/Hobart",
"Australia/Melbourne",
"Australia/Sydney"
]
},
{
"friendlyName": "Mawson Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Antarctica/Mawson"
]
},
{
"friendlyName": "New Zealand Time",
"offsetString": "GMT+13:00",
"offsetNumeric": 780,
"longTimezones": [
"Antarctica/McMurdo",
"Pacific/Auckland"
]
},
{
"friendlyName": "Palmer Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"Antarctica/Palmer"
]
},
{
"friendlyName": "Rothera Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"Antarctica/Rothera"
]
},
{
"friendlyName": "Syowa Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Antarctica/Syowa"
]
},
{
"friendlyName": "Troll Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Antarctica/Troll"
]
},
{
"friendlyName": "Vostok Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Antarctica/Vostok"
]
},
{
"friendlyName": "Arabian Standard Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Asia/Aden",
"Asia/Baghdad",
"Asia/Bahrain",
"Asia/Kuwait",
"Asia/Qatar",
"Asia/Riyadh"
]
},
{
"friendlyName": "East Kazakhstan Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Almaty",
"Asia/Qostanay"
]
},
{
"friendlyName": "Jordan Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Asia/Amman"
]
},
{
"friendlyName": "Anadyr Standard Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Asia/Anadyr"
]
},
{
"friendlyName": "West Kazakhstan Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Aqtau",
"Asia/Aqtobe",
"Asia/Atyrau",
"Asia/Oral",
"Asia/Qyzylorda"
]
},
{
"friendlyName": "Turkmenistan Standard Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Ashgabat"
]
},
{
"friendlyName": "Azerbaijan Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Asia/Baku"
]
},
{
"friendlyName": "Indochina Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Bangkok",
"Asia/Phnom_Penh",
"Asia/Saigon",
"Asia/Vientiane"
]
},
{
"friendlyName": "Barnaul Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Barnaul"
]
},
{
"friendlyName": "Eastern European Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Asia/Beirut",
"Asia/Gaza",
"Asia/Hebron",
"Asia/Nicosia",
"Europe/Athens",
"Europe/Bucharest",
"Europe/Chisinau",
"Europe/Helsinki",
"Europe/Kiev",
"Europe/Mariehamn",
"Europe/Riga",
"Europe/Sofia",
"Europe/Tallinn",
"Europe/Uzhgorod",
"Europe/Vilnius",
"Europe/Zaporozhye"
]
},
{
"friendlyName": "Kyrgyzstan Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Bishkek"
]
},
{
"friendlyName": "Brunei Darussalam Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Brunei"
]
},
{
"friendlyName": "India Standard Time",
"offsetString": "GMT+05:30",
"offsetNumeric": 330,
"longTimezones": [
"Asia/Calcutta",
"Asia/Colombo"
]
},
{
"friendlyName": "Yakutsk Standard Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Asia/Chita",
"Asia/Khandyga",
"Asia/Yakutsk"
]
},
{
"friendlyName": "Ulaanbaatar Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Choibalsan",
"Asia/Ulaanbaatar"
]
},
{
"friendlyName": "Syria Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Asia/Damascus"
]
},
{
"friendlyName": "Bangladesh Standard Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Dhaka"
]
},
{
"friendlyName": "East Timor Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Asia/Dili"
]
},
{
"friendlyName": "Gulf Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Asia/Dubai",
"Asia/Muscat"
]
},
{
"friendlyName": "Tajikistan Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Dushanbe"
]
},
{
"friendlyName": "Famagusta Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Asia/Famagusta"
]
},
{
"friendlyName": "Hong Kong Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Hong_Kong"
]
},
{
"friendlyName": "Hovd Standard Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Hovd"
]
},
{
"friendlyName": "Irkutsk Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Irkutsk"
]
},
{
"friendlyName": "Western Indonesia Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Jakarta",
"Asia/Pontianak"
]
},
{
"friendlyName": "Eastern Indonesia Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Asia/Jayapura"
]
},
{
"friendlyName": "Israel Time",
"offsetString": "GMT+02:00",
"offsetNumeric": 120,
"longTimezones": [
"Asia/Jerusalem"
]
},
{
"friendlyName": "Afghanistan Time",
"offsetString": "GMT+04:30",
"offsetNumeric": 270,
"longTimezones": [
"Asia/Kabul"
]
},
{
"friendlyName": "Petropavlovsk-Kamchatski Standard Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Asia/Kamchatka"
]
},
{
"friendlyName": "Pakistan Standard Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Karachi"
]
},
{
"friendlyName": "Nepal Time",
"offsetString": "GMT+05:45",
"offsetNumeric": 345,
"longTimezones": [
"Asia/Katmandu"
]
},
{
"friendlyName": "Krasnoyarsk Standard Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Krasnoyarsk",
"Asia/Novokuznetsk"
]
},
{
"friendlyName": "Malaysia Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Kuala_Lumpur",
"Asia/Kuching"
]
},
{
"friendlyName": "China Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Macau",
"Asia/Shanghai"
]
},
{
"friendlyName": "Magadan Standard Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Asia/Magadan"
]
},
{
"friendlyName": "Central Indonesia Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Makassar"
]
},
{
"friendlyName": "Philippine Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Manila"
]
},
{
"friendlyName": "Novosibirsk Standard Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Novosibirsk"
]
},
{
"friendlyName": "Omsk Standard Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Omsk"
]
},
{
"friendlyName": "Korean Standard Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Asia/Pyongyang",
"Asia/Seoul"
]
},
{
"friendlyName": "Myanmar Time",
"offsetString": "GMT+06:30",
"offsetNumeric": 390,
"longTimezones": [
"Asia/Rangoon"
]
},
{
"friendlyName": "Sakhalin Standard Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Asia/Sakhalin"
]
},
{
"friendlyName": "Uzbekistan Standard Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Samarkand",
"Asia/Tashkent"
]
},
{
"friendlyName": "Singapore Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Singapore"
]
},
{
"friendlyName": "Srednekolymsk Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Asia/Srednekolymsk"
]
},
{
"friendlyName": "Taipei Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Asia/Taipei"
]
},
{
"friendlyName": "Georgia Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Asia/Tbilisi"
]
},
{
"friendlyName": "Iran Time",
"offsetString": "GMT+03:30",
"offsetNumeric": 210,
"longTimezones": [
"Asia/Tehran"
]
},
{
"friendlyName": "Bhutan Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Thimphu"
]
},
{
"friendlyName": "Japan Standard Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Asia/Tokyo"
]
},
{
"friendlyName": "Tomsk Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Asia/Tomsk"
]
},
{
"friendlyName": "Urumqi Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Asia/Urumqi"
]
},
{
"friendlyName": "Vladivostok Standard Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Asia/Ust-Nera",
"Asia/Vladivostok"
]
},
{
"friendlyName": "Yekaterinburg Standard Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Asia/Yekaterinburg"
]
},
{
"friendlyName": "Armenia Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Asia/Yerevan"
]
},
{
"friendlyName": "Azores Time",
"offsetString": "GMT-01:00",
"offsetNumeric": -60,
"longTimezones": [
"Atlantic/Azores"
]
},
{
"friendlyName": "Western European Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Atlantic/Canary",
"Atlantic/Faeroe",
"Atlantic/Madeira",
"Europe/Lisbon"
]
},
{
"friendlyName": "Cape Verde Standard Time",
"offsetString": "GMT-01:00",
"offsetNumeric": -60,
"longTimezones": [
"Atlantic/Cape_Verde"
]
},
{
"friendlyName": "South Georgia Time",
"offsetString": "GMT-02:00",
"offsetNumeric": -120,
"longTimezones": [
"Atlantic/South_Georgia"
]
},
{
"friendlyName": "Falkland Islands Standard Time",
"offsetString": "GMT-03:00",
"offsetNumeric": -180,
"longTimezones": [
"Atlantic/Stanley"
]
},
{
"friendlyName": "Central Australia Time",
"offsetString": "GMT+10:30",
"offsetNumeric": 630,
"longTimezones": [
"Australia/Adelaide",
"Australia/Broken_Hill"
]
},
{
"friendlyName": "Australian Eastern Standard Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Australia/Brisbane",
"Australia/Lindeman"
]
},
{
"friendlyName": "Australian Central Standard Time",
"offsetString": "GMT+09:30",
"offsetNumeric": 570,
"longTimezones": [
"Australia/Darwin"
]
},
{
"friendlyName": "Australian Central Western Standard Time",
"offsetString": "GMT+08:45",
"offsetNumeric": 525,
"longTimezones": [
"Australia/Eucla"
]
},
{
"friendlyName": "Lord Howe Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Australia/Lord_Howe"
]
},
{
"friendlyName": "Australian Western Standard Time",
"offsetString": "GMT+08:00",
"offsetNumeric": 480,
"longTimezones": [
"Australia/Perth"
]
},
{
"friendlyName": "Astrakhan Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Europe/Astrakhan"
]
},
{
"friendlyName": "Ireland Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Europe/Dublin"
]
},
{
"friendlyName": "Guernsey Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Europe/Guernsey"
]
},
{
"friendlyName": "Isle of Man Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Europe/Isle_of_Man"
]
},
{
"friendlyName": "Turkey Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Europe/Istanbul"
]
},
{
"friendlyName": "Jersey Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Europe/Jersey"
]
},
{
"friendlyName": "Kirov Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Europe/Kirov"
]
},
{
"friendlyName": "United Kingdom Time",
"offsetString": "GMT",
"offsetNumeric": null,
"longTimezones": [
"Europe/London"
]
},
{
"friendlyName": "Moscow Standard Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Europe/Minsk",
"Europe/Moscow",
"Europe/Simferopol"
]
},
{
"friendlyName": "Samara Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Europe/Samara"
]
},
{
"friendlyName": "Saratov Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Europe/Saratov"
]
},
{
"friendlyName": "Ulyanovsk Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Europe/Ulyanovsk"
]
},
{
"friendlyName": "Volgograd Standard Time",
"offsetString": "GMT+03:00",
"offsetNumeric": 180,
"longTimezones": [
"Europe/Volgograd"
]
},
{
"friendlyName": "Indian Ocean Time",
"offsetString": "GMT+06:00",
"offsetNumeric": 360,
"longTimezones": [
"Indian/Chagos"
]
},
{
"friendlyName": "Christmas Island Time",
"offsetString": "GMT+07:00",
"offsetNumeric": 420,
"longTimezones": [
"Indian/Christmas"
]
},
{
"friendlyName": "Cocos Islands Time",
"offsetString": "GMT+06:30",
"offsetNumeric": 390,
"longTimezones": [
"Indian/Cocos"
]
},
{
"friendlyName": "French Southern & Antarctic Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Indian/Kerguelen"
]
},
{
"friendlyName": "Seychelles Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Indian/Mahe"
]
},
{
"friendlyName": "Maldives Time",
"offsetString": "GMT+05:00",
"offsetNumeric": 300,
"longTimezones": [
"Indian/Maldives"
]
},
{
"friendlyName": "Mauritius Standard Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Indian/Mauritius"
]
},
{
"friendlyName": "Réunion Time",
"offsetString": "GMT+04:00",
"offsetNumeric": 240,
"longTimezones": [
"Indian/Reunion"
]
},
{
"friendlyName": "Apia Standard Time",
"offsetString": "GMT+13:00",
"offsetNumeric": 780,
"longTimezones": [
"Pacific/Apia"
]
},
{
"friendlyName": "Bougainville Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Bougainville"
]
},
{
"friendlyName": "Chatham Time",
"offsetString": "GMT+13:45",
"offsetNumeric": 825,
"longTimezones": [
"Pacific/Chatham"
]
},
{
"friendlyName": "Easter Island Time",
"offsetString": "GMT-05:00",
"offsetNumeric": -300,
"longTimezones": [
"Pacific/Easter"
]
},
{
"friendlyName": "Vanuatu Standard Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Efate"
]
},
{
"friendlyName": "Phoenix Islands Time",
"offsetString": "GMT+13:00",
"offsetNumeric": 780,
"longTimezones": [
"Pacific/Enderbury"
]
},
{
"friendlyName": "Tokelau Time",
"offsetString": "GMT+13:00",
"offsetNumeric": 780,
"longTimezones": [
"Pacific/Fakaofo"
]
},
{
"friendlyName": "Fiji Standard Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Fiji"
]
},
{
"friendlyName": "Tuvalu Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Funafuti"
]
},
{
"friendlyName": "Galapagos Time",
"offsetString": "GMT-06:00",
"offsetNumeric": -360,
"longTimezones": [
"Pacific/Galapagos"
]
},
{
"friendlyName": "Gambier Time",
"offsetString": "GMT-09:00",
"offsetNumeric": -540,
"longTimezones": [
"Pacific/Gambier"
]
},
{
"friendlyName": "Solomon Islands Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Guadalcanal"
]
},
{
"friendlyName": "Chamorro Standard Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Pacific/Guam",
"Pacific/Saipan"
]
},
{
"friendlyName": "Hawaii-Aleutian Standard Time",
"offsetString": "GMT-10:00",
"offsetNumeric": -600,
"longTimezones": [
"Pacific/Honolulu",
"Pacific/Johnston"
]
},
{
"friendlyName": "Line Islands Time",
"offsetString": "GMT+14:00",
"offsetNumeric": 840,
"longTimezones": [
"Pacific/Kiritimati"
]
},
{
"friendlyName": "Kosrae Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Kosrae"
]
},
{
"friendlyName": "Marshall Islands Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Kwajalein",
"Pacific/Majuro"
]
},
{
"friendlyName": "Marquesas Time",
"offsetString": "GMT-09:30",
"offsetNumeric": -570,
"longTimezones": [
"Pacific/Marquesas"
]
},
{
"friendlyName": "Samoa Standard Time",
"offsetString": "GMT-11:00",
"offsetNumeric": -660,
"longTimezones": [
"Pacific/Midway",
"Pacific/Pago_Pago"
]
},
{
"friendlyName": "Nauru Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Nauru"
]
},
{
"friendlyName": "Niue Time",
"offsetString": "GMT-11:00",
"offsetNumeric": -660,
"longTimezones": [
"Pacific/Niue"
]
},
{
"friendlyName": "Norfolk Island Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Norfolk"
]
},
{
"friendlyName": "New Caledonia Standard Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Noumea"
]
},
{
"friendlyName": "Palau Time",
"offsetString": "GMT+09:00",
"offsetNumeric": 540,
"longTimezones": [
"Pacific/Palau"
]
},
{
"friendlyName": "Pitcairn Time",
"offsetString": "GMT-08:00",
"offsetNumeric": -480,
"longTimezones": [
"Pacific/Pitcairn"
]
},
{
"friendlyName": "Ponape Time",
"offsetString": "GMT+11:00",
"offsetNumeric": 660,
"longTimezones": [
"Pacific/Ponape"
]
},
{
"friendlyName": "Papua New Guinea Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Pacific/Port_Moresby"
]
},
{
"friendlyName": "Cook Islands Standard Time",
"offsetString": "GMT-10:00",
"offsetNumeric": -600,
"longTimezones": [
"Pacific/Rarotonga"
]
},
{
"friendlyName": "Tahiti Time",
"offsetString": "GMT-10:00",
"offsetNumeric": -600,
"longTimezones": [
"Pacific/Tahiti"
]
},
{
"friendlyName": "Gilbert Islands Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Tarawa"
]
},
{
"friendlyName": "Tonga Standard Time",
"offsetString": "GMT+13:00",
"offsetNumeric": 780,
"longTimezones": [
"Pacific/Tongatapu"
]
},
{
"friendlyName": "Chuuk Time",
"offsetString": "GMT+10:00",
"offsetNumeric": 600,
"longTimezones": [
"Pacific/Truk"
]
},
{
"friendlyName": "Wake Island Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Wake"
]
},
{
"friendlyName": "Wallis & Futuna Time",
"offsetString": "GMT+12:00",
"offsetNumeric": 720,
"longTimezones": [
"Pacific/Wallis"
]
}
]
@skwee357
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I would change line 11 from
return sign * (hours * 60 + minutes)
to
return sign * (hours * 60 + minutes) || 0

Because otherwise, it returns NaN for GMT+0

@timfee
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Author

timfee commented Jul 24, 2023

thank you! will do

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