Iam sorry, but what exactly is your question? lol
2006-09-27 12:25:09
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answer #1
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answered by Island Queen 6
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International Date Line
The International Date Line around 180°This article is about the line dividing time zones; see Dateline for other meanings, including the television program.
The International Date Line (IDL), also known as just the Date Line, is an imaginary line on the surface of the Earth opposite the Prime Meridian which offsets the date as one travels east or west across it. Roughly along 180° longitude, with diversions to pass around some territories and island groups, it corresponds to the time zone boundary separating +12 and -12 hours GMT (UT1). All lines of longitude meet at the poles.
The first date-line problem occurred in association with Magellan's circumnavigation of the globe. The surviving crew returned to a Spanish stopover sure of the day of the week, as attested by various carefully maintained sailing logs. Nevertheless, those on land insisted the day was different. Although now readily understandable, this phenomenon caused great excitement at the time, to the extent that a special delegation was sent to the Pope to explain this oddity to him.
For the most part, the International Date Line follows the meridian of 180° longitude, roughly down the middle of the Pacific Ocean. However, because the date to the east of the line is one day earlier than that to the west of the line, the line deviates to pass around the far east of Russia and various island groups in the Pacific, no country wanting to have, at least during ordinary daytime hours, its citizens functioning on two different dates. Thus, the two largest deviations from this meridian both occur to keep the date line from crossing nations internally.
In the north, the date line swings to the east through Bering Strait and then west past the Aleutian Islands in order to keep Alaska (part of the United States) and Russia on opposite sides of the line and their territories due north and south of each other in concert with the date of the rest of each respective country. In the central Pacific, the date line was moved in 1995 to extend around, rather than through, the islands of the Republic of Kiribati. As a British colony, Kiribati was centered in the Gilbert Islands, just west of the International Dateline. Upon independence in 1979, the new republic acquired the Phoenix and Line Islands from the United States and the country found itself straddling the date line. Government offices on opposite sides of the line could only communicate on the four days of the week when both sides experienced weekdays simultaneously. A consequence of this time zone revision was that Kiribati, by virtue of its easternmost possession, uninhabited Caroline Atoll at 150°25'W, started on its territory the year 2000 before any other country on earth, a feature which the Kiribati government capitalized upon as a potential tourist draw. However, even into the 21st century, many mapmakers (including Google Maps [1]) are not aware of this Kiribati dateline shift and continue to represent the International Date as a straight line in the Kiribati area.
In the South Pacific, the dateline swings east such that various islands administered by New Zealand (which lies west of 180°) are on the same date with New Zealand.
The International Date Line can cause confusion among airline travelers. The most troublesome situation usually occurs with short journeys from west to east. For example, to travel from Tonga to Samoa by air takes approximately two hours. Thus, if a person leaves at noon on Tuesday, they will arrive at 2 p.m. on Monday. Meanwhile, someone in Samoa inquiring about the departing flight may be told there is no flight until the next day. There could also be problems with the traveler having to repeat Monday. Journal entries and photographs may end up out of sequence, and there could be errors in a person's medication schedule. In addition, those making connecting flights might choose the wrong date for the reservation. There was an interesting story about a sportsman who the day before his birthday took off from the USA to Australia for the 2000 Summer Olympics. When the plane landed it was the day after his birthday.
2006-09-27 19:28:52
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answer #6
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answered by mysticideas 6
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The international date line, which is at longitude 180 degrees (exactly opposite the prime meridian). The only thing is that it differs from east to west (as if they were different time zones).
2006-09-27 19:19:42
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answer #7
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answered by eyanyo13 3
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