Most of Arizona and Hawaii don't use DST. In addition the uninhabited atolls of Baker Island (AoE) and Wake Island (WAKT) add to the time zone count, making 11 the total number of time zones in the US.Īlmost all states in the US use Daylight Saving Time (DST). There are 9 official time zones according to the law. The time zones in the law are defined by their offset from Coordinated Universal Time (UTC). Code, Title 15, Chapter 6, Subchapter IX - Standard Time. Time zones in the USA are defined in the U.S. Since 1967, the US Department of Transportation (DOT) has been responsible for governing time zones in the country. The US was divided into 4 standard time zones on November 18, 1883, and jurisdiction for the zones was given to the Interstate Commerce Commission (ICC). Time Zones Being Used in Dependencies of United States Offset They will become active again after the next clock change as Daylight Saving Time begins or ends. The above time zones are used during other parts of the year. Time Zones Not Currently Being Observed in United States Offset Note: Local time in these time zones changes when Daylight Saving Time begins and ends. In practice, this means that the local time in these time zones changes when DST begins and ends. For example, Eastern Time (ET) refers to Eastern Standard Time (EST) or Eastern Daylight Time (EDT), depending on which is currently in use. The time zones in the contiguous US are often referred to by their generic name, without making a difference between standard time and Daylight Saving Time designations. Find the exact time difference with the Time Zone Converter Time Difference Calculator which converts the time difference between places and time zones all over the world. Generalized Time Zones in United States Time Zone Abbreviation & Name Get the time at any given coordinate on Earth, calculate time zone conversions. Since Howland Island and Baker Island constitute the world's westernmost landmasses in relation to the International Date Line, making them the last places on Earth where any date exists, they are sometimes assigned a theoretical 12th time zone called Anywhere on Earth (AoE). As neither Hawaii nor the 5 dependencies use Daylight Saving Time (DST), there are only 6 corresponding DST time zones. In addition, Alaska, Hawaii, and 5 US dependencies all have their own time zones. The contiguous US has 4 standard time zones. However, adding the time zones of 2 uninhabited US territories, Howland Island and Baker Island, brings the total count to 11 time zones. There are 9 time zones by law in the USA and its dependencies. Time Zones Currently Being Used in United States Offset Business Date to Date (exclude holidays).The International Date Line runs between Tonga and American Samoa note that each has the exact same time, but they are exactly one day apart. The starting time for UTC (Coordinated Universal Time), formerly known as GMT (Greenwich Mean Time) begins in Greenwich, England it is displayed in the center column below, and it never observes daylight saving time, or (DST)Īnd be the first to see our $100 geography quiz hints, geography facts, latest maps, ( time changes), travel news, photos, videos and much more Firefox and Safari, still display it as GMT. Some sources refer to it as UTC/GMT, and some browsers, I.E. The worldwide standard for coordinated universal time is now abbreviated as UTC. View the selected places on the Interactive Daylight Map, compare time between locations or time zones Time Zone Converter. current dates and times around the world shown below- Time now in world cities and GMT/UTC time difference (offset) Current time in major world cities.
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