Standards

Timezones

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Not present in the other table

Intl API (Built-in)

  • • Source: JavaScript runtime's built-in database
  • • Updates: Tied to Node.js version updates
  • • Coverage: Only timezones supported by runtime
  • • Performance: Instant (no network call)
  • • Includes canonical zones + common aliases

Total: 418 timezones (121 not in IANA)

Offset
ID
Name
Region
Long Name
Abbr.
Generic Name
Generic Short
DST
Std Offset
DST Offset
UTC+00Africa/AbidjanAbidjanAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+00Africa/AccraAccraAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+03Africa/Addis_AbabaAddis AbabaAfricaEast Africa TimeGMT+3East Africa TimeEthiopia TimeNoUTC+03—
UTC+01Africa/AlgiersAlgiersAfricaCentral European Standard TimeGMT+1Central European Standard TimeAlgeria TimeNoUTC+01—
UTC+03Africa/AsmeraAsmeraAfricaEast Africa TimeGMT+3East Africa TimeEritrea TimeNoUTC+03—
UTC+00Africa/BamakoBamakoAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+01Africa/BanguiBanguiAfricaWest Africa TimeGMT+1West Africa TimeCentral African Republic TimeNoUTC+01—
UTC+00Africa/BanjulBanjulAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+00Africa/BissauBissauAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+02Africa/BlantyreBlantyreAfricaCentral Africa TimeGMT+2Central Africa TimeMalawi TimeNoUTC+02—
UTC+01Africa/BrazzavilleBrazzavilleAfricaWest Africa TimeGMT+1West Africa TimeCongo - Brazzaville TimeNoUTC+01—
UTC+02Africa/BujumburaBujumburaAfricaCentral Africa TimeGMT+2Central Africa TimeBurundi TimeNoUTC+02—
UTC+03Africa/CairoCairoAfricaEastern European Summer TimeGMT+3Eastern European TimeEgypt TimeYesUTC+02UTC+03
UTC+01Africa/CasablancaCasablancaAfricaGMT+01:00GMT+1Morocco TimeMorocco TimeNoUTC+01—
UTC+02Africa/CeutaCeutaAfricaCentral European Summer TimeGMT+2Central European TimeCeuta TimeYesUTC+01UTC+02
UTC+00Africa/ConakryConakryAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+00Africa/DakarDakarAfricaGreenwich Mean TimeGMTGreenwich Mean TimeGMTNoUTC+00—
UTC+03Africa/Dar_es_SalaamDar es SalaamAfricaEast Africa TimeGMT+3East Africa TimeTanzania TimeNoUTC+03—
UTC+03Africa/DjiboutiDjiboutiAfricaEast Africa TimeGMT+3East Africa TimeDjibouti TimeNoUTC+03—
UTC+01Africa/DoualaDoualaAfricaWest Africa TimeGMT+1West Africa TimeCameroon TimeNoUTC+01—
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IANA tz database

  • • Source: Official IANA tzdata repository
  • • Updates: Real-time from authoritative source
  • • Coverage: All canonical zones (inhabited since 1970)
  • • Performance: Requires network fetch
  • • Only canonical zones (no aliases)

Total: 312 timezones (15 not in Intl)

Offset
ID
Name
Region
Countries
Comment
UTC+02Europe/AndorraAndorraEurope🇦🇩—
UTC+04Asia/DubaiDubaiAsia🇦🇪🇴🇲🇷🇪🇸🇨🇹🇫Crozet
UTC+04:30Asia/KabulKabulAsia🇦🇫—
UTC+02Europe/TiraneTiraneEurope🇦🇱—
UTC+04Asia/YerevanYerevanAsia🇦🇲—
UTC+08Antarctica/CaseyCaseyAntarctica🇦🇶Casey
UTC+07Antarctica/DavisDavisAntarctica🇦🇶Davis
UTC+05Antarctica/MawsonMawsonAntarctica🇦🇶Mawson
UTC-03Antarctica/PalmerPalmerAntarctica🇦🇶Palmer
UTC-03Antarctica/RotheraRotheraAntarctica🇦🇶Rothera
UTC+02Antarctica/TrollTrollAntarctica🇦🇶Troll
UTC+05Antarctica/VostokVostokAntarctica🇦🇶Vostok
UTC-03America/Argentina/Buenos_AiresArgentina/Buenos AiresAmerica🇦🇷Buenos Aires (BA, CF)
UTC-03America/Argentina/CordobaArgentina/CordobaAmerica🇦🇷most areas: CB, CC, CN, ER, FM, MN, SE, SF
UTC-03America/Argentina/SaltaArgentina/SaltaAmerica🇦🇷Salta (SA, LP, NQ, RN)
UTC-03America/Argentina/JujuyArgentina/JujuyAmerica🇦🇷Jujuy (JY)
UTC-03America/Argentina/TucumanArgentina/TucumanAmerica🇦🇷Tucumán (TM)
UTC-03America/Argentina/CatamarcaArgentina/CatamarcaAmerica🇦🇷Catamarca (CT), Chubut (CH)
UTC-03America/Argentina/La_RiojaArgentina/La RiojaAmerica🇦🇷La Rioja (LR)
UTC-03America/Argentina/San_JuanArgentina/San JuanAmerica🇦🇷San Juan (SJ)
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