International Dateline

mw-headline" id="Géographie class="mw-editsection-bracket">[a class="mw-editsection-visualeditor" href="/w/index.php?title=International_Date_Line&veaction=edit&section=1" titl : mw-headline" id="Géographie class="mw-editsection-bracket">[a class="mw-editsection-visualeditor" href="/w/index.php?title=International_Date_Line&veaction=edit&section=1" titl : "Change section=1" page : Changer la section : Geography ">Change U| U| U / W / index.php?title=International_Date_Line&action=edit&section=1" Title="Change section: geography">change source]>>

International Date Line (IDL), also known as the date line, is an fictive line on the earth's face that runs from the North to the South in the Pacific. This effect is due to the fact that the states on the west side of the International Date Line (inside or outside East Asia) have the timezone 10-12 hrs more than Greenwich.

Also, the east of the country (Alaska/Hawaii and other areas) has the timezone 9-12 hrs less than Greenwich. So, when crossing the line, the clock needs to be set 20-24 hrs according to the timezone. New Zealand is twelve-hour ahead of Greenwich Mean and Hawaii ten-hour behind Greenwich Mean is.

For journeys from New Zealand to Hawaii, the watches must be shifted back about 22hrs. The International Date Line follows the 180° long ocean midway meridion for some years. In order not to pass through any nation, it crosses the far eastern part of Russia and other Pacific archipelago.

The dateline turns eastwards through the Bering Strait in the northern direction and then westwards past the Aleuts to stop Alaska and Russia on opposite sides of the line. It bypasses the Kiribati area by swaying far to the eastward side and almost reaches the 150 degrees south.

The South Pacific date line moves eastwards, so Wallis and Futuna, Fiji, Tonga and the New Zealand Kermadec Islands have the same date, but Samoa is one date before. It can cause disorientation for air travellers. Most of the time, the most difficult situations occur during brief trips from western to eastern direction.

For example, the flight from Tonga to Samoa will take about two hour, but will require the passenger to cross the International Date Line so that they will be arriving the next morning before departure. A few of the timezone settings for true airline flights are: Alaska, Siberia 21hrs, New Zealand Cook Islands 22hrs and Samoa Tonga 24hrs.

When travelling around the world in an aircraft from the East to the west (the same way as Magellan), one hr per 15 degrees of intersection should be deducted, loosing 24 hr for one round of the Earth; however, when travelling across the International Date Line (from East/West), 24 hr is added.

Therefore, the International Date Line must be complied with in connection with the Earth's timezones: the net adaptation to your own clock is zero. Three different observation periods are performed simultaneously for two hrs a week at 10:00-11:59am. For example, at 10:15 a. m. on Thursday in Samoa on Wednesday, 11 h. behind Samoa, and 00:15 a. m. on Friday in Kiritimati (separated from Samoa by the IDL), 14 h. before it is.

In the first lesson (UTC 10:00-10:59) this phenomena affects populated areas, while in the second lesson (UTC 11:00-11:59) it affects only an unoccupied nautical timezone 12 h behind it. The date line initially ran along the 180 degree martian. It is a relatively good option as there is usually no country there.

Viewed from the northeast, one of the first places where the mainland is crossed by the Chukchi Peninsula, which belongs to Russia. Many archipelagos exist in the Pacific. Those groups are among states that do not want some island on one side of the International Date Line, and the other one.

You have therefore chosen to move the date line so that all of your island are in the same timezone. An example of this are the Aleuts, which are located on both sides of the 180 degree mermanidian. There' s a bulge in the western border. New Zealand has some small archipelagos situated at 180° north.

The decision was made that they should have the same date as New Zealand, so that the date line would run eastwards of the maridion. The state of Kiribati consists of many small islets scattered over a large part of the Pacific; the meridion crosses the state. Since the state needed the same date across its entire territories, the date line was moved eastward, the largest move that took place in 1995.

Therefore, they agreed that they wanted the same date, the same dateline in the western part of the state.