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Time zone abbreviations

What EST, PST, GMT, CET, IST and other time zone abbreviations mean, and their UTC offsets.

AbbreviationNameOffset
HSTHawaii Standard TimeUTC−10
AKSTAlaska Standard TimeUTC−9
AKDTAlaska Daylight TimeUTC−8
PSTPacific Standard TimeUTC−8
MSTMountain Standard TimeUTC−7
PDTPacific Daylight TimeUTC−7
CSTCentral Standard TimeUTC−6
MDTMountain Daylight TimeUTC−6
CDTCentral Daylight TimeUTC−5
ESTEastern Standard TimeUTC−5
ASTAtlantic Standard TimeUTC−4
EDTEastern Daylight TimeUTC−4
NSTNewfoundland Standard TimeUTC−3:30
ADTAtlantic Daylight TimeUTC−3
ARTArgentina TimeUTC−3
BRTBrasília TimeUTC−3
NDTNewfoundland Daylight TimeUTC−2:30
GMTGreenwich Mean TimeUTC±0
UTCCoordinated Universal TimeUTC±0
WETWestern European TimeUTC±0
BSTBritish Summer TimeUTC+1
CETCentral European TimeUTC+1
WATWest Africa TimeUTC+1
WESTWestern European Summer TimeUTC+1
CATCentral Africa TimeUTC+2
CESTCentral European Summer TimeUTC+2
EETEastern European TimeUTC+2
SASTSouth Africa Standard TimeUTC+2
ASTArabia Standard TimeUTC+3
EATEast Africa TimeUTC+3
EESTEastern European Summer TimeUTC+3
MSKMoscow TimeUTC+3
GSTGulf Standard TimeUTC+4
PKTPakistan Standard TimeUTC+5
ISTIndia Standard TimeUTC+5:30
NPTNepal TimeUTC+5:45
ICTIndochina TimeUTC+7
WIBWestern Indonesia TimeUTC+7
AWSTAustralian Western Standard TimeUTC+8
CSTChina Standard TimeUTC+8
PHTPhilippine TimeUTC+8
SGTSingapore TimeUTC+8
JSTJapan Standard TimeUTC+9
KSTKorea Standard TimeUTC+9
ACSTAustralian Central Standard TimeUTC+9:30
AESTAustralian Eastern Standard TimeUTC+10
ACDTAustralian Central Daylight TimeUTC+10:30
AEDTAustralian Eastern Daylight TimeUTC+11
NZSTNew Zealand Standard TimeUTC+12
NZDTNew Zealand Daylight TimeUTC+13

Some abbreviations are shared: CST is Central Standard Time in North America and China Standard Time in Asia; IST can be India, Irish or Israel Standard Time; AST can be Atlantic or Arabia Standard Time. When it matters, write the UTC offset too.

See also: world clock · time zone converter · day and night map