Time Zone Boundary Lines in the United States

United States Time Zone Map

United States Time Zone Boundary Map

The United States uses nine standard time zones. From east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10).

Time Zone Boundaries in the United States

CODE UNITED STATES TIME ZONE BOUNDARIES UTC OFFSET
AST ATLANTIC STANDARD TIME UTC - 4
EST EASTERN STANDARD TIME UTC - 5
CST CENTRAL STANDARD TIME UTC - 6
MST MOUNTAIN STANDARD TIME UTC - 7
PST PACIFIC STANDARD TIME UTC - 8
AKST ALASKA STANDARD TIME UTC - 9
HAST HAWAII-ALEUTIAN STANDARD TIME UTC - 10
WST SAMOA STANDARD TIME UTC - 11
CHST CHAMORRO STANDARD TIME UTC +10

Boundary Line Between Eastern and Central Zones
Boundary Line Between Central and Moutain Zones
Boundary Line Between Mountain and Pacific Zones

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