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Index of time zones and abbreviations

The index of time zones is a list of time zones sorted alphabetically by region. Each time zone is represented by an abbreviation, such as EST for Eastern Standard Time or GMT for Greenwich Mean Time. Time zone abbreviations are typically three letters long and represent the common abbreviation for each time zone. Some examples include:

There are 40 distinct time zones in the world, not including Daylight Saving Time (DST) adjustments. Many countries observe DST, which temporarily shifts the standard time in a region by one hour during certain parts of the year. This is done to make better use of sunlight during the longer days of summer.

Time Zone Map

The time zone map is a map that shows the various time zones around the world. Each time zone is represented by a different color on the map, and the time in each zone is displayed in the center of the zone. The time zone map can be useful for understanding the time differences between different parts of the world and for planning international communication and travel.

The time zone map is divided into 24 time zones, each of which is 15 degrees wide. The time zones are centered on the Prime Meridian, which is 0 degrees longitude, and the International Date Line, which is 180 degrees longitude. Time zones to the west of the Prime Meridian are ahead of Coordinated Universal Time (UTC), while time zones to the east are behind UTC.

Time zone boundaries can be somewhat arbitrary, as they are often based on political and economic considerations rather than purely geographic ones. As a result, some time zones may be quite large, while others may be quite small. Despite these variations, the time zone map provides a useful representation of the global time system.

Timezones of the World
Map of timezones

A Quick Guide To World Time zones

World timezones are actually a relatively new part of the way that the civilized world works. World timezones were created in order to create a certain amount of uniformity in how people describe their time of day in different parts of the world. Using local or solar time makes it nearly impossible for modern society to work. If we didn’t have world timezones, scheduling trains would be nearly impossible, planning meetings in different countries would quickly prove problematic, and similar issues would arise daily.

Daylight doesn’t hit the world uniformly, which means that if there was a single standard time worldwide, you would have a completely different impression of what 10:00 AM would look like. Though this does not sound like a major problem, it does make many things difficult to describe, such as the time of day. In the times before world timezones, people would often find it nearly impossible to schedule meetings at a long distance due to the difficulty in coming to an agreement on what time it was. World timezones are made with legal, social, and commercial purposes in mind.

Initially, there was only one real way to distinguish different world time zones. However, there are now multiple ways to discern time using a world clock. Still, the most common way to deal with the world clock is to use the Greenwich Mean Time, also known as GMT, as a measuring stick. Standard world timezones are made with an offset of hours referring to GMT. So, New Zealand’s time is often quoted as being 11 hours and 30 minutes ahead of Greenwich Mean Time.

Advancements in the measuring of time allowed scientists to come up with a system that allows them to consider the seconds lost each year. This doesn’t sound like much, but seconds do add up to minutes eventually. The newer form of time-telling using world timezones is called UTC and is based off of GMT time-telling.

Normally, one would simply believe that GMT and UTC time zones are enough. But still, there are even more ways of differentiating time zones for those who are curious.

Many countries have chosen to use their own standard time zones, and so have many different groups of people. Military personnel often use military time zones to plan their maneuvers. Nautical time zones, which are non-skewed, are very common among people who frequently travel by boat. When it comes to different countries and continents, other common ways of dividing time zones include CET (Central European Time), and New Zealand Mean Time.

There is still a lot of bickering about which timezones are actually the best ones to use universally. There really isn’t a universally accepted time zone scheme, and things are even more complicated when Daylight Savings Time is taken into consideration. Many, if not most, countries no longer practice Daylight Savings Time. The issue of Daylight Savings Time, or DST, has been one that has caused a certain amount of friction in international airports, as well as a lot of confusion abroad.

Travelers looking to find a reliable way to tell time abroad are best off using world timezones used by both military and naval personalities. They are often the most accurate ways to tell time. Of course, for those who are scheduling meetings and figuring out when they will be able to catch a plane, it’s best to search up the current world timezones your destination location happens to be using. After all, it’s always better to be safe than sorry.

Index of Time zones

Alphabetically sorted. Note that some of the abbreviations are not unique; these will have several entries in the list. Other time zones have many common names, and each of these will be listed as well.

AbbreviationFull nameLocationTimezone
AAlpha Time ZoneMilitaryUTC + 1 hour
ACDTAustralian Central Daylight TimeAustraliaUTC + 10:30 hours
ACSTAustralian Central Standard TimeAustraliaUTC + 9:30 hours
ADTAtlantic Daylight TimeAtlanticUTC – 3 hours
ADTAtlantic Daylight TimeNorth AmericaUTC – 3 hours
AEDTAustralian Eastern Daylight TimeAustraliaUTC + 11 hours
AESTAustralian Eastern Standard TimeAustraliaUTC + 10 hours
AFTAfghanistan TimeAsiaUTC + 4:30 hours
AKDTAlaska Daylight TimeNorth AmericaUTC – 8 hours
AKSTAlaska Standard TimeNorth AmericaUTC – 9 hours
ALMTAlma-Ata TimeAsiaUTC + 6 hours
AMSTArmenia Summer TimeAsiaUTC + 5 hours
AMSTAmazon Summer TimeSouth AmericaUTC – 3 hours
AMTArmenia TimeAsiaUTC + 4 hours
AMTAmazon TimeSouth AmericaUTC – 4 hours
ANASTAnadyr Summer TimeAsiaUTC + 12 hours
ANATAnadyr TimeAsiaUTC + 12 hours
AQTTAqtobe TimeAsiaUTC + 5 hours
ARTArgentina TimeSouth AmericaUTC – 3 hours
ASTArabia Standard TimeAsiaUTC + 3 hours
ASTAtlantic Standard TimeAtlanticUTC – 4 hours
ASTAtlantic Standard TimeCaribbeanUTC – 4 hours
ASTAtlantic Standard TimeNorth AmericaUTC – 4 hours
AWDTAustralian Western Daylight TimeAustraliaUTC + 9 hours
AWSTAustralian Western Standard TimeAustraliaUTC + 8 hours
AZOSTAzores Summer TimeAtlanticUTC
AZOTAzores TimeAtlanticUTC – 1 hour
AZSTAzerbaijan Summer TimeAsiaUTC + 5 hours
AZTAzerbaijan TimeAsiaUTC + 4 hours
BBravo Time ZoneMilitaryUTC + 2 hours
BNTBrunei Darussalam TimeAsiaUTC + 8 hours
BOTBolivia TimeSouth AmericaUTC – 4 hours
BRSTBrasilia Summer TimeSouth AmericaUTC – 2 hours
BRTBrasília timeSouth AmericaUTC – 3 hours
BSTBangladesh Standard TimeAsiaUTC + 6 hours
BSTBritish Summer TimeEuropeUTC + 1 hour
BTTBhutan TimeAsiaUTC + 6 hours
CCharlie Time ZoneMilitaryUTC + 3 hours
CASTCasey TimeAntarcticaUTC + 8 hours
CATCentral Africa TimeAfricaUTC + 2 hours
CCTCocos Islands TimeIndian OceanUTC + 6:30 hours
CDTCuba Daylight TimeCaribbeanUTC – 4 hours
CDTCentral Daylight TimeNorth AmericaUTC – 5 hours
CESTCentral European Summer TimeEuropeUTC + 2 hours
CETCentral European TimeAfricaUTC + 1 hour
CETCentral European TimeEuropeUTC + 1 hour
CHADTChatham Island Daylight TimePacificUTC + 13:45 hours
CHASTChatham Island Standard TimePacificUTC + 12:45 hours
CKTCook Island TimePacificUTC – 10 hours
CLSTChile Summer TimeSouth AmericaUTC – 3 hours
CLTChile Standard TimeSouth AmericaUTC – 4 hours
COTColombia TimeSouth AmericaUTC – 5 hours
CSTChina Standard TimeAsiaUTC + 8 hours
CSTCentral Standard TimeCentral AmericaUTC – 6 hours
CSTCuba Standard TimeCaribbeanUTC – 5 hours
CSTCentral Standard TimeNorth AmericaUTC – 6 hours
CVTCape Verde TimeAfricaUTC – 1 hour
CXTChristmas Island TimeAustraliaUTC + 7 hours
ChSTChamorro Standard TimePacificUTC + 10 hours
DDelta Time ZoneMilitaryUTC + 4 hours
DAVTDavis TimeAntarcticaUTC + 7 hours
EEcho Time ZoneMilitaryUTC + 5 hours
EASSTEaster Island Summer TimePacificUTC – 5 hours
EASTEaster Island Standard TimePacificUTC – 6 hours
EATEastern Africa TimeAfricaUTC + 3 hours
EATEast Africa TimeIndian OceanUTC + 3 hours
ECTEcuador TimeSouth AmericaUTC – 5 hours
EDTEastern Daylight TimeCaribbeanUTC – 4 hours
EDTEastern Daylight TimeNorth AmericaUTC – 4 hours
EDTEastern Daylight TimePacificUTC + 11 hours
EESTEastern European Summer TimeAfricaUTC + 3 hours
EESTEastern European Summer TimeAsiaUTC + 3 hours
EESTEastern European Summer TimeEuropeUTC + 3 hours
EETEastern European TimeAfricaUTC + 2 hours
EETEastern European TimeAsiaUTC + 2 hours
EETEastern European TimeEuropeUTC + 2 hours
EGSTEastern Greenland Summer TimeNorth AmericaUTC
EGTEast Greenland TimeNorth AmericaUTC – 1 hour
ESTEastern Standard TimeCentral AmericaUTC – 5 hours
ESTEastern Standard TimeCaribbeanUTC – 5 hours
ESTEastern Standard TimeNorth AmericaUTC – 5 hours
ETTiempo del EsteCentral AmericaUTC – 5 hours
ETTiempo del EsteCaribbeanUTC – 5 hours
ETTiempo Del EsteNorth AmericaUTC – 5 hours
FFoxtrot Time ZoneMilitaryUTC + 6 hours
FJSTFiji Summer TimePacificUTC + 13 hours
FJTFiji TimePacificUTC + 12 hours
FKSTFalkland Islands Summer TimeSouth AmericaUTC – 3 hours
FKTFalkland Island TimeSouth AmericaUTC – 4 hours
FNTFernando de Noronha TimeSouth AmericaUTC – 2 hours
GGolf Time ZoneMilitaryUTC + 7 hours
GALTGalapagos TimePacificUTC – 6 hours
GAMTGambier TimePacificUTC – 9 hours
GETGeorgia Standard TimeAsiaUTC + 4 hours
GFTFrench Guiana TimeSouth AmericaUTC – 3 hours
GILTGilbert Island TimePacificUTC + 12 hours
GMTGreenwich Mean TimeAfricaUTC
GMTGreenwich Mean TimeEuropeUTC
GSTGulf Standard TimeAsiaUTC + 4 hours
GYTGuyana TimeSouth AmericaUTC – 4 hours
HHotel Time ZoneMilitaryUTC + 8 hours
HAAHeure Avancée de l’AtlantiqueAtlanticUTC – 3 hours
HAAHeure Avancée de l’AtlantiqueNorth AmericaUTC – 3 hours
HACHeure Avancée du CentreNorth AmericaUTC – 5 hours
HADTHawaii-Aleutian Daylight TimeNorth AmericaUTC – 9 hours
HAEHeure Avancée de l’EstCaribbeanUTC – 4 hours
HAEHeure Avancée de l’EstNorth AmericaUTC – 4 hours
HAPHeure Avancée du PacifiqueNorth AmericaUTC – 7 hours
HARHeure Avancée des RocheusesNorth AmericaUTC – 6 hours
HASTHawaii-Aleutian Standard TimeNorth AmericaUTC – 10 hours
HATHeure Avancée de Terre-NeuveNorth AmericaUTC – 2:30 hours
HAYHeure Avancée du YukonNorth AmericaUTC – 8 hours
HKTHong Kong TimeAsiaUTC + 8 hours
HLVHora Legal de VenezuelaSouth AmericaUTC – 4:30 hours
HNAHeure Normale de l’AtlantiqueAtlanticUTC – 4 hours
HNAHeure Normale de l’AtlantiqueCaribbeanUTC – 4 hours
HNAHeure Normale de l’AtlantiqueNorth AmericaUTC – 4 hours
HNCHeure Normale du CentreCentral AmericaUTC – 6 hours
HNCHeure Normale du CentreNorth AmericaUTC – 6 hours
HNEHeure Normale de l’EstCentral AmericaUTC – 5 hours
HNEHeure Normale de l’EstCaribbeanUTC – 5 hours
HNEHeure Normale de l’EstNorth AmericaUTC – 5 hours
HNPHeure Normale du PacifiqueNorth AmericaUTC – 8 hours
HNRHeure Normale des RocheusesNorth AmericaUTC – 7 hours
HNTHeure Normale de Terre-NeuveNorth AmericaUTC – 3:30 hours
HNYHeure Normale du YukonNorth AmericaUTC – 9 hours
HOVTHovd TimeAsiaUTC + 7 hours
IIndia Time ZoneMilitaryUTC + 9 hours
ICTIndochina TimeAsiaUTC + 7 hours
IDTIsrael Daylight TimeAsiaUTC + 3 hours
IOTIndian Chagos TimeIndian OceanUTC + 6 hours
IRDTIran Daylight TimeAsiaUTC + 4:30 hours
IRKSTIrkutsk Summer TimeAsiaUTC + 9 hours
IRKTIrkutsk TimeAsiaUTC + 9 hours
IRSTIran Standard TimeAsiaUTC + 3:30 hours
ISTIsrael Standard TimeAsiaUTC + 2 hours
ISTIndia Standard TimeAsiaUTC + 5:30 hours
ISTIrish Standard TimeEuropeUTC + 1 hour
JSTJapan Standard TimeAsiaUTC + 9 hours
KKilo Time ZoneMilitaryUTC + 10 hours
KGTKyrgyzstan TimeAsiaUTC + 6 hours
KRASTKrasnoyarsk Summer TimeAsiaUTC + 8 hours
KRATKrasnoyarsk TimeAsiaUTC + 8 hours
KSTKorea Standard TimeAsiaUTC + 9 hours
KUYTKuybyshev TimeEuropeUTC + 4 hours
LLima Time ZoneMilitaryUTC + 11 hours
LHDTLord Howe Daylight TimeAustraliaUTC + 11 hours
LHSTLord Howe Standard TimeAustraliaUTC + 10:30 hours
LINTLine Islands TimePacificUTC + 14 hours
MMike Time ZoneMilitaryUTC + 12 hours
MAGSTMagadan Summer TimeAsiaUTC + 12 hours
MAGTMagadan TimeAsiaUTC + 12 hours
MARTMarquesas TimePacificUTC – 9:30 hours
MAWTMawson TimeAntarcticaUTC + 5 hours
MDTMountain Daylight TimeNorth AmericaUTC – 6 hours
MESZMitteleuropäische SommerzeitEuropeUTC + 2 hours
MEZMitteleuropäische ZeitAfricaUTC + 1 hour
MHTMarshall Islands TimePacificUTC + 12 hours
MMTMyanmar TimeAsiaUTC + 6:30 hours
MSDMoscow Daylight TimeEuropeUTC + 4 hours
MSKMoscow Standard TimeEuropeUTC + 4 hours
MSTMountain Standard TimeNorth AmericaUTC – 7 hours
MUTMauritius TimeAfricaUTC + 4 hours
MVTMaldives TimeAsiaUTC + 5 hours
MYTMalaysia TimeAsiaUTC + 8 hours
NNovember Time ZoneMilitaryUTC – 1 hour
NCTNew Caledonia TimePacificUTC + 11 hours
NDTNewfoundland Daylight TimeNorth AmericaUTC – 2:30 hours
NFTNorfolk TimeAustraliaUTC + 11:30 hours
NOVSTNovosibirsk Summer TimeAsiaUTC + 7 hours
NOVTNovosibirsk TimeAsiaUTC + 6 hours
NPTNepal TimeAsiaUTC + 5:45 hours
NSTNewfoundland Standard TimeNorth AmericaUTC – 3:30 hours
NUTNiue TimePacificUTC – 11 hours
NZDTNew Zealand Daylight TimeAntarcticaUTC + 13 hours
NZDTNew Zealand Daylight TimePacificUTC + 13 hours
NZSTNew Zealand Standard TimeAntarcticaUTC + 12 hours
NZSTNew Zealand Standard TimePacificUTC + 12 hours
OOscar Time ZoneMilitaryUTC – 2 hours
OMSSTOmsk Summer TimeAsiaUTC + 7 hours
OMSTOmsk Standard TimeAsiaUTC + 7 hours
PPapa Time ZoneMilitaryUTC – 3 hours
PDTPacific Daylight TimeNorth AmericaUTC – 7 hours
PETPeru TimeSouth AmericaUTC – 5 hours
PETSTKamchatka Summer TimeAsiaUTC + 12 hours
PETTKamchatka TimeAsiaUTC + 12 hours
PGTPapua New Guinea TimePacificUTC + 10 hours
PHOTPhoenix Island TimePacificUTC + 13 hours
PHTPhilippine TimeAsiaUTC + 8 hours
PKTPakistan Standard TimeAsiaUTC + 5 hours
PMDTPierre & Miquelon Daylight TimeNorth AmericaUTC – 2 hours
PMSTPierre & Miquelon Standard TimeNorth AmericaUTC – 3 hours
PONTPohnpei Standard TimePacificUTC + 11 hours
PSTPacific Standard TimeNorth AmericaUTC – 8 hours
PSTPitcairn Standard TimePacificUTC – 8 hours
PTTiempo del PacíficoNorth AmericaUTC – 8 hours
PWTPalau TimePacificUTC + 9 hours
PYSTParaguay Summer TimeSouth AmericaUTC – 3 hours
PYTParaguay TimeSouth AmericaUTC – 4 hours
QQuebec Time ZoneMilitaryUTC – 4 hours
RRomeo Time ZoneMilitaryUTC – 5 hours
RETReunion TimeAfricaUTC + 4 hours
SSierra Time ZoneMilitaryUTC – 6 hours
SAMTSamara TimeEuropeUTC + 4 hours
SASTSouth Africa Standard TimeAfricaUTC + 2 hours
SBTSolomon IslandsTimePacificUTC + 11 hours
SCTSeychelles TimeAfricaUTC + 4 hours
SGTSingapore TimeAsiaUTC + 8 hours
SRTSuriname TimeSouth AmericaUTC – 3 hours
SSTSamoa Standard TimePacificUTC – 11 hours
TTango Time ZoneMilitaryUTC – 7 hours
TAHTTahiti TimePacificUTC – 10 hours
TFTFrench Southern and Antarctic TimeIndian OceanUTC + 5 hours
TJTTajikistan TimeAsiaUTC + 5 hours
TKTTokelau TimePacificUTC + 13 hours
TLTEast Timor TimeAsiaUTC + 9 hours
TMTTurkmenistan TimeAsiaUTC + 5 hours
TVTTuvalu TimePacificUTC + 12 hours
UUniform Time ZoneMilitaryUTC – 8 hours
ULATUlaanbaatar TimeAsiaUTC + 8 hours
UTCUniversal Time CoordinatedUniversalUTC
UYSTUruguay Summer TimeSouth AmericaUTC – 2 hours
UYTUruguay TimeSouth AmericaUTC – 3 hours
UZTUzbekistan TimeAsiaUTC + 5 hours
VVictor Time ZoneMilitaryUTC – 9 hours
VETVenezuelan Standard TimeSouth AmericaUTC – 4:30 hours
VLASTVladivostok Summer TimeAsiaUTC + 11 hours
VLATVladivostok TimeAsiaUTC + 11 hours
VUTVanuatu TimePacificUTC + 11 hours
WWhiskey Time ZoneMilitaryUTC – 10 hours
WASTWest Africa Summer TimeAfricaUTC + 2 hours
WATWest Africa TimeAfricaUTC + 1 hour
WESTWestern European Summer TimeAfricaUTC + 1 hour
WESTWestern European Summer TimeEuropeUTC + 1 hour
WESZWesteuropäische SommerzeitAfricaUTC + 1 hour
WETWestern European TimeAfricaUTC
WETWestern European TimeEuropeUTC
WEZWesteuropäische ZeitEuropeUTC
WFTWallis and Futuna TimePacificUTC + 12 hours
WGSTWestern Greenland Summer TimeNorth AmericaUTC – 2 hours
WGTWest Greenland TimeNorth AmericaUTC – 3 hours
WIBWestern Indonesian TimeAsiaUTC + 7 hours
WITEastern Indonesian TimeAsiaUTC + 9 hours
WITACentral Indonesian TimeAsiaUTC + 8 hours
WSTWestern Sahara Summer TimeAfricaUTC + 1 hour
WSTWest Samoa TimePacificUTC + 13 hours
WTWestern Sahara Standard TimeAfricaUTC
XX-ray Time ZoneMilitaryUTC – 11 hours
YYankee Time ZoneMilitaryUTC – 12 hours
YAKSTYakutsk Summer TimeAsiaUTC + 10 hours
YAKTYakutsk TimeAsiaUTC + 10 hours
YAPTYap TimePacificUTC + 10 hours
YEKSTYekaterinburg Summer TimeAsiaUTC + 6 hours
YEKTYekaterinburg TimeAsiaUTC + 6 hours
ZZulu Time ZoneMilitaryUTC

Timezones by regions