The continental United States (the 48 contiguous states) is divided into 4 time zones. Eastern Time (EST/EDT) Central Time (CST/CDT).
Hawaii-Aleutian Time Zone
The Hawaii-Aleutian Time Zone derives its name from two areas: Hawaii and the Aleutian Islands in Alaska. These two areas do not use daylight saving time.
Alaska Time Zone
The Alaska Time Zone encompasses almost the entire state of Alaska. Standard time is observed in this time zone by subtracting 9 hours from UTC (UTC-09:00) and 8 hours during DST (UTC-08:00).
Pacific Time Zone
The Pacific Time Zone (PT) encompasses the western states of the US, western Mexico, and western Canada. The standard time within this zone is observed by subtracting 8 hours from UTC (UTC-8). During DST, an offsite time of UTC-7 is used. PST is one hour ahead of Hawaii and Alaska Time Zones, and at least one hour behind the other time zones.
Mountain Time Zone
The Mountain Time Zone (MT) observes standard time by subtracting 7 hours from UTC (UTC-07:00) and 6 hours during DST (UTC-06:00). In the US, this time zone is generally known as Mountain Time (MT).
To learn more about many time zones refer to:
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