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(See § Cartographic practice and convention below.) A person who goes around the world from east to west (the same direction as Magellan's voyage) would gain or set their clock back one hour for every 15° of longitude crossed, and would gain 24 hours for one circuit of the globe from east to west if they did not compensate by setting their clock forward one day when they crossed the IDL.In contrast, a west-to-east circumnavigation of the globe loses an hour for every 15° of longitude crossed but gains back a day when crossing the IDL.One of our aims is to do just that, not just by putting people in touch with awesome and gorgeous gingers, but also by creating a dialogue through our blog, marketing efforts and endorsements.We also encourage good chat and banter on our busy Facebook page. Teasing, ginger jokes and unfortunately even outright bullying are too commonplace.An ability to laugh at oneself is very important (and redheads usually have a great sense of humour), but at the same time there should be a balance of positive publicity towards redheads that will cancel out the nastiness aimed at us by the ignorant few.At the equinoxes, the first place to see daylight would be the uninhabited Millennium Island in Kiribati, which is the easternmost land located west of the IDL.
These various deviations generally accommodate the political and/or economic affiliations of the affected areas. The IDL remains on the 180° meridian until passing the equator.The International Date Line (IDL) is an imaginary line of navigation on the surface of the Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next.It passes through the middle of the Pacific Ocean, roughly following the 180° line of longitude but deviating to pass around some territories and island groups. (Times are approximate, since time zone boundaries generally do not exactly coincide with meridians.Kiribati's easternmost islands, the southern Line Islands south of Hawaii, have the most advanced time on Earth, UTC 14 hours.South of Kiribati, the IDL returns westwards but remains east of 180°, passing between Samoa and American Samoa.Proceeding from north to south, the first deviation of the IDL from 180° is to pass to the east of Wrangel Island and the Chukchi Peninsula, the easternmost part of Russian Siberia. Two US-owned uninhabited atolls, Howland Island and Baker Island, just north of the equator in the central Pacific Ocean (and ships at sea between 172.5°W and 180°), have the latest time on Earth (UTC−12 hours).(Wrangel Island lies directly on the meridian at 71°32′N 180°0′E, also noted as 71°32′N 180°0′W.) It then bends considerably west of 180°, passing west of St. The IDL circumscribes Kiribati by swinging far to the east, almost reaching the 150°W meridian.The IDL must therefore be observed in conjunction with the Earth's time zones: on crossing it in either direction, the calendar date is adjusted by one day.For the two hours between and UTC each day, three different calendar dates are observed at the same time in different places on Earth.All nations unilaterally determine their standard time zones, applicable only on land and adjacent territorial waters.This date line can be called de facto since it is not based on international law, but on national laws.