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Time Zone Abbreviations – Time Zones in North America

Time zone codes and names for standard and daylight time in North America

AbbreviationTime zone name Other names Offset
ADT Atlantic Daylight Time HAA UTC -3
AKDT Alaska Daylight Time UTC -8
AKST Alaska Standard Time UTC -9
AST Atlantic Standard Time AST, HNA UTC -4
AT Atlantic Time UTC -4:00 / -3:00
CDT Central Daylight Time HAC UTC -5
CST Central Standard Time CST, HNC UTC -6
CT Central Time UTC -6:00 / -5:00
EDT Eastern Daylight Time HAE, EDT UTC -4
EGST Eastern Greenland Summer Time UTC +0
EGT East Greenland Time UTC -1
EST Eastern Standard Time ET, HNE UTC -5
ET Eastern Time UTC -5:00 / -4:00
GMT Greenwich Mean Time UTC +0
HDT Hawaii-Aleutian Daylight Time UTC -9
HST Hawaii Standard Time UTC -10
MDT Mountain Daylight Time HAR UTC -6
MST Mountain Standard Time HNR UTC -7
MT Mountain Time UTC -7:00 / -6:00
NDT Newfoundland Daylight Time HAT UTC -2:30
NST Newfoundland Standard Time HNT UTC -3:30
PDT Pacific Daylight Time HAP UTC -7
PMDT Pierre & Miquelon Daylight Time UTC -2
PMST Pierre & Miquelon Standard Time UTC -3
PST Pacific Standard Time PT, HNP UTC -8
PT Pacific Time UTC -8:00 / -7:00
WGST Western Greenland Summer Time UTC -2
WGT West Greenland Time UTC -3


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