Map of time zones in usa

You are free to use our US time zone map for educational and commercial uses. Attribution is required. How to attribute? This US time zone map displays the six designated time zones of the United States.

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Map of time zones in usa

A time zone is an area which observes a uniform standard time for legal , commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude , because it is convenient for areas in frequent communication to keep the same time. Time zones are defined as one or two offsets from Coordinated Universal Time UTC , and if two offsets are used the days when the offset changes. Some time zones switch between offsets throughout the year due to daylight saving time DST. Areas of extreme latitude are more likely to use DST. DST is usually used for about half of the year, typically by adding one hour to local time during spring and summer. When DST is in effect, approximately during spring and summer, their UTC offset is increased by one hour except for Lord Howe Island , where it is increased by 30 minutes. The apparent position of the Sun in the sky, and thus solar time , varies by location due to the spherical shape of the Earth. This variation corresponds to four minutes of time for every degree of longitude , so for example when it is solar noon in London , it is about 10 minutes before solar noon in Bristol , which is about 2. The Royal Observatory, Greenwich , founded in , established Greenwich Mean Time GMT , the mean solar time at that location, as an aid to mariners to determine longitude at sea, providing a standard reference time while each location in England kept a different time.

December 26, This US time zone map displays the six designated time zones of the United States. Main article: ISO

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There are 9 time zones by law in the USA and its dependencies. However, adding the time zones of 2 uninhabited US territories, Howland Island and Baker Island , brings the total count to 11 time zones. The contiguous US has 4 standard time zones. In addition, Alaska , Hawaii , and 5 US dependencies all have their own time zones. 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. 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. In practice, this means that the local time in these time zones changes when DST begins and ends. Note: Local time in these time zones changes when Daylight Saving Time begins and ends. The above time zones are used during other parts of the year.

Map of time zones in usa

Pacific time. Fri Mar Mountain time. Central time. Eastern time.

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By about , almost all inhabited places on Earth had adopted a standard time zone, but only some of them used an hourly offset from GMT. Saint Pierre and Miquelon. Arizona Colorado Montana. Search for: Search. That works when having telephone or internet meetings. Kolkata , India This is a great website to show to my clients who travel to Europe and beyond. Web servers presenting web pages primarily for an audience in a single time zone or a limited range of time zones typically show times as a local time, perhaps with UTC time in brackets. Past Present Future Eternity. In Google Calendar , calendar events are stored in UTC although shown in local time and might be changed by a time-zone changes, [46] although normal daylight saving start and end are compensated for similar to much other calendar software. This is a great website to show to my clients who travel to Europe and beyond.

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More internationally oriented websites may show times in UTC only or using an arbitrary time zone. Retrieved November 11, Retrieved January 27, DST never observed. Retrieved December 1, Archived from the original on August 19, August 6, Archived from the original on November 30, Main article: List of time zone abbreviations. July Archived from the original on February 13, Retrieved December 5,