Time Zones in the United States
Time zones in the United States are defined by federal law federal law 15 USC §260. There are currently six standard time zones covering the United States. There are an additional four standard
time zones covering territories of the United States. In the continental United States there are four Standard Time Zones.
Daylight Saving Time in the United States
Daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. local time ( "spring forward and fall back"). In the spring clocks are moved forward from 2:00 a.m. to 3:00 a.m. and in fall they are moved back from 2:00 am to 1:00 am
Areas of the United States that do not Observe Daylight Savings Time (DST)
There are several areas of the United States that do not observe Daylight Savings time. In the contiguous United States, the majority of the state of Arizona
remains on Mountain Standard Time
throughout the year.
The exception to this is the Navajo Nation which covers portions of Northeast Arizona and does observe daylight savings time (Mountain Daylight Time).
Annette Island and the settlement of Metlakatla in Alaska
do not observe daylight savings time or Alaska Time. Instead Metlakatla follows Pacific Standard Time
all year round.
Future DST Start and End Dates for the United States
|Start Date||End Date|
|Sunday ,March 10 , 2013||Sunday ,November 3 , 2013|
|Sunday ,March 9 , 2014||Sunday ,November 2 , 2014|
|Sunday ,March 8 , 2015||Sunday ,November 1 , 2015|
|Sunday ,March 13 , 2016||Sunday ,November 6 , 2016|
|Sunday ,March 12 , 2017||Sunday ,November 5 , 2017|
|Sunday ,March 11 , 2018||Sunday ,November 4 , 2018|
|Sunday ,March 10 , 2019||Sunday ,November 3 , 2019|
States With Multiple Time Zones
There are several states that are divided by two time zones: