USA // Time Zones // Philately // Computer Software Services

US Postage Stamps // Philatelic Project // US Time Zones

US Standard Time Zones
The United States are splitted into six standard time zones. Eleven states are located in two time zones. The US island territories and the independent COFA^[4] states areas are located in seven additional standard time zones. UTC (Coordinated Universal Time) is equivalent to GMT (Greenwich Mean Time).
From East to West:	Dual time zone states:	US Island Territories:	*Independent COFA^[4] States:*
Eastern (UTC -5/4)^[1] Central (UTC -6/5)^[1] Mountain (UTC -7/6)^[1,2] Pacific (UTC -8/7)^[1] Alaska (UTC -9/8)^[1] Hawaii-Aleutian (UTC -10/9)^[1,3]	Eastern/Central (Michigan, Indiana, Kentucky, Tennessee, and Florida) Central/Mountain (North Dakota, South Dakota, Nebraska, and Kansas) Mountain/Pacific (Idaho and Oregon)	Atlantic (UTC -4) (Puerto Rico, US Virgin Islands) Samoa (UTC -11) (American Samoa) Chamorro (UTC +10) (Guam, Northern Marianas)	Marshall Islands (UTC +12) (Republic of the Marshall Islands) Pohnpei (UTC +11) (Federate States of Micronesia, States of Pohnpei and Kosrae) Chuuk/Yap (UTC +10) (Federate States of Micronesia, States of Chuuk and Yap) Palau (UTC +9) (Republic of Palau)
^[1] Daylight saving time (DST) begins each year on the second Sunday in March at 02:00 a.m. local time. Clocks must be moved ahead one hour when DST goes into effect. The changeover back to standard time (ST) occurs on the first Sunday in November at 02:00 a.m. local time. Clocks must be moved back one hour. Some people remember which way to move their clocks using the phrase, "spring forward, fall back". ^[2] Arizona does not observe DST, except the Navajo Indian Nation in the Northeast. ^[3] Aleutian Islands only; Hawaii does not observe DST. ^[4] Compact Of Free Association with the United States.

Hawaii (no DST) - Aleutian Time (HST/HDT)
Hawaiian Archipelago and
Aleutian Islands (Alaska)

Alaska Time (AKST/AKDT)

Pacific Time (PST/PDT)

Mountain Time (MST/MDT)
Arizona/non-Navajo, no DST

Central Time (CST/CDT)

Eastern Time (EST/EDT)

Red lines mark the time zone boundaries, grey lines mark the state borders, and blue bars mark states located in two time zones.

Arizona does not observe Daylight Saving Time, except the Navajo Indian Nation in the Northeast.

Please click here to learn more about Indiana's time zone history.

Please click here for printable map.

US Island Territiories - Current Local Time
No Daylight Saving Time observed

Atlantic Standard Time
(AST)
US Territories of
Puerto Rico and US Virgin Islands

Samoa Standard Time
(SST)
US Territory of American Samoa
[View map]

Chamorro Standard Time
(ChST)
US Territories of the
Northern Marianas and Guam
[View map]

Independent island states in free association with the USA - Current Local Time
No Daylight Saving Time observed

Marshall Islands Time
(MHT)
Republic of the Marshall Islands
[View map]

Pohnpei Time
(PONT)
Federate States of Micronesia
(States of Pohnpei and Kosrae)
[View map]

Chuuk and Yap Time
(CHUT/YAPT)
Federate States of Micronesia
(States of Chuuk and Yap)
[View map]

Palau Time
(PWT)
Republic of Palau
[View map]

modified