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Time-zone
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. Each time zone is defined by a standard offset from Coordinated Universal Time (UTC). The offsets range from UTC−12:00 to UTC+14:00, and are usually a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such as in India and Nepal. Some areas in a time zone may use a different offset for part of the year, typically one hour ahead during spring and summer, a practice known as daylight saving time (DST). List of UTC offsets In the table below, the locations that use daylight saving time (DST) are listed in their UTC offset when DST is ''not'' in effect. When DST is in effect, approximately during spring and summer, their UTC ...
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Indian Standard Time
Indian Standard Time (IST), sometimes also called India Standard Time, is the time zone observed throughout the Republic of India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military and aviation time, IST is designated E* ("Echo-Star"). It is indicated as ''Asia/Kolkata'' in the IANA time zone database. History The Indian Standard Time was adopted on 1 January 1906 during the British era with the phasing out of its precursor Madras Time (Railway Time), and after Independence in 1947, the Union government established IST as the official time for the whole country, although Kolkata and Mumbai retained their own local time (known as Calcutta Time and Bombay Time) until 1948 and 1955, respectively. The Central observatory was moved from Chennai to a location at Shankargarh Fort in Allahabad district, so that it would be as close to UTC+05:30 as possible. Daylight Saving Time (DST) was used brief ...
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Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and is the effective successor to Greenwich Mean Time (GMT) in everyday usage and common applications. In specialised domains such as scientific research, navigation, and timekeeping, other standards such as Universal Time, UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French name, ''temps atomique international''), which is a weighted average of hundreds of atomic clocks worldwide. UTC is within about one second of mean solar time at 0° longitude, the currently used prime meridian, and is not adjusted for daylight saving time. The coordination of t ...
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Daylight Saving Time
Daylight saving time (DST), also referred to as daylight savings time, daylight time (Daylight saving time in the United States, United States and Daylight saving time in Canada, Canada), or summer time (British Summer Time, United Kingdom, Summer time in Europe, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time. The standard implementation of DST is to set clocks forward by one hour in spring (season), spring or late winter, and to set clocks back by one hour to standard time in the autumn (or ''fall'' in North American English, hence the mnemonic: "spring forward and fall back"). Overview As of 2023, around 34 percent of the world's countries use DST. Some countries observe it only in some regions. In Canada, all of Yukon Time Zone, Yukon, most of Time in Saskatchewan, Saskatchewan, and parts of Nunavut, Ontario, British Columbia and Quebec do not ...
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Time In California
The Pacific Time Zone (PT) is a time zone encompassing parts of western Canada, the western United States, and western Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time ( UTC−08:00). During daylight saving time, a time offset of UTC−07:00 is used. In the United States and Canada, this time zone is generically called the Pacific Time Zone. Specifically, time in this zone is referred to as Pacific Standard Time (PST) when standard time is being observed (early November to mid-March), and Pacific Daylight Time (PDT) when daylight saving time (mid-March to early November) is being observed. In Mexico, the corresponding time zone is known as the ''Zona Noroeste'' (Northwest Zone) and observes the same daylight saving schedule as the United States and Canada. The largest city in the Pacific Time Zone is Los Angeles, whose metropolitan area is also the largest in the time zone. The zone is two hours ahead of the Hawaii� ...
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Time In Alaska
Alaska is officially covered by two time zones - the Alaska Time Zone and the Hawaii–Aleutian Time Zone. The Hawaii–Aleutian Time Zone is used for the Aleutian Islands west of 169°30′W (Islands of Four Mountains, Andreanof Islands, Rat Islands and Near Islands), and the rest of the state uses the Alaska Time Zone. The entirety of Alaska observes daylight saving time. The town of Hyder, because it essentially is a single town split by the border between the United States and Canada, unofficially observes Pacific Time including DST ( UTC−08:00, DST UTC−07:00) like its neighbor Stewart, British Columbia, with the exception of the U.S. Post Office (because it is a federal facility). History As part of Russian America, Alaska used the Julian calendar and followed the same day of the week as Asia, using the date of the eastern hemisphere. In 1867, Alaska became a United States territory (through the Alaska Purchase) and began using the Gregorian calendar, aligning with the ...
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World Time Zones
This is a list representing time zones by country. Countries are ranked by total number of time zones on their territory. Time zones of a country include that of dependent territories (except Antarctic claims). France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties). Many countries have daylight saving time, one added hour during the local summer, but this list does not include that information. The UTC offset in the list is not valid in practice during daylight saving time. See also * Lists of time zones *List of UTC time offsets This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during sta ... * Time zone abolition References {{DEFAULTSORT:Time zones by country, List of Geography-related lists Geograph ...
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Nepal Time
Nepal Standard Time (NPT) is the time zone for Nepal. With a time offset from Coordinated Universal Time (UTC) of UTC+05:45 all over Nepal, it is one of only three time zones with a 45-minute offset from UTC.The others are Chatham Island Standard Time, with an offset of UTC+12:45, and the unofficial Australian Central Western Time, with an offset of UTC+08:45. Calculation NPT is an approximation of Kathmandu mean time, which is 5 hours, 41 minutes, and 16 seconds ahead of UTC. The standard meridian passes through the peak of Gaurishankar mountain about east of Kathmandu. History Nepal used local solar time until the year 1920, in Kathmandu UTC+05:41:16. In 1920, Nepal adopted Indian Standard Time Indian Standard Time (IST), sometimes also called India Standard Time, is the time zone observed throughout the Republic of India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. I ..., UTC+05:30. In 1986 ...
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Time In Idaho
The U.S. state of Idaho is covered by two time zones, as described below. All locations observe daylight saving time. The Pacific Time Zone ( UTC−08:00, DST UTC−07:00) covers an area roughly coterminous with the Idaho Panhandle or North Idaho: * Benewah County * Bonner County * Boundary County * Clearwater County *Kootenai County (includes Coeur d'Alene) * Latah County (includes Moscow) * Lewis County *Nez Perce County (includes Lewiston) * Shoshone County *Portion of Idaho County north of the Salmon River *The towns of Burgdorf and Warren An easy way to distinguish the line is that it essentially follows the line that divides Washington and Oregon. Idaho counties east of Washington observe Pacific Time, and Idaho counties east of Oregon observe Mountain Time. The Mountain Time Zone ( UTC−07:00, DST UTC−06:00) covers the rest of the state. History The 1918 Standard Time Act put most of Idaho into the Pacific Time Zone – only the very eastern parts were ...
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Marquesas Islands
The Marquesas Islands ( ; or ' or ' ; Marquesan language, Marquesan: ' (North Marquesan language, North Marquesan) and ' (South Marquesan language, South Marquesan), both meaning "the land of men") are a group of volcano, volcanic islands in French Polynesia, an overseas collectivity of France in the southern Pacific Ocean. Their highest point is the peak of Mont Oave, Mount Oave () on Ua Pou island, at 1,230 m (4,035 ft) above sea level. Archaeological research suggests the islands were colonized in the 10th century AD by voyagers from West Polynesia. Over the centuries that followed, the islands have maintained a "remarkably uniform culture, biology and language". The Marquesas were named after the 16th-century Spanish Viceroy of Peru, the García Hurtado de Mendoza, 5th Marquis of Cañete, Marquis of Cañete (), by navigator , who visited them in 1595. The Marquesas Islands constitute one of the administrative divisions of French Polynesia, five administrative di ...
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Andreanof Islands
The Andreanof Islands (, ) are a group of islands in the Aleutian Islands in southwestern Alaska, United States. They are located at about 52° North and 172°57' to 179°09' West. Geography The Andreanof Islands are located between Amchitka Pass and the Rat Islands group to the west, and Amukta Pass and the Islands of Four Mountains group to the east. The islands extend about 275 miles (440 km). The total land area of all islands (including the Delarof Islands) is 1,515.349 sq mi (3,924.737 km2). The total population was 412 persons as of the 2000 census, the vast majority in the city of Adak on Adak Island. Islands The Delarof Islands are a subgroup of the Andreanof Islands group as well as the westernmost islands in the group. The largest islands in the group are, from west to east, Gareloi Island, Tanaga Island, Kanaga, Adak Island, Kagalaska Island, Great Sitkin Island, Atka Island, Amlia, and Seguam Island. The islands are usually foggy and treele ...
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Gambier Islands
The Gambier Islands ( or ) are an archipelago in French Polynesia, located at the southeast terminus of the Tuamotu archipelago. They cover an area of , and are made up of the Mangareva Islands, a group of high islands remnants of a caldera along with islets on the surrounding fringing reef, and the uninhabited Temoe atoll, which is located 45 km (28 mi) south-east of the Mangareva Islands. The Gambiers are generally considered a separate island group from Tuamotu both because their culture and language (Mangarevan language, Mangarevan) are much more closely related to those of the Marquesas Islands, and because, while the Tuamotus comprise several chains of coral atolls, the Mangareva Islands are of volcanic origin with central high islands. Administratively, the Gambier Islands are inside the Communes of France, commune of Gambier (commune), Gambier, which also includes several atolls in the Tuamotu Archipelago. The town hall (''mairie'') of the commune of Gambier is located o ...
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Alaska
Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the northernmost, westernmost, and easternmost (the Aleutian Islands cross the 180th meridian into the eastern hemisphere) state in the United States. It borders the Canadian territory of Yukon and the province of British Columbia to the east. It shares a western maritime border, in the Bering Strait, with Russia's Chukotka Autonomous Okrug. The Chukchi and Beaufort Seas of the Arctic Ocean lie to the north, and the Pacific Ocean lies to the south. Technically, it is a semi-exclave of the U.S., and is the largest exclave in the world. Alaska is the largest U.S. state by area, comprising more total area than the following three largest states of Texas, California, and Montana combined, and is the seventh-largest subnational division i ...
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