Date line history

The Dateline Is Not Straight

However, no attempts were made during this conference to specify the exact course of the date line when it happened to cross land or pass through island. The Editors of Encyclopaedia Britannica. See Article History. Alternative Title: Date Line. International Date Line, also called Date Line, imaginary line extending. Erroneous International Date Line from the Meyers Konversations-Lexikon. The Philippine Islands are shown.

However, no attempts were made during this conference to specify the exact course of the date line when it happened to cross land or pass through island. The general concept of a date line preexists Caroll. By the 17th century possible locations for the line had been proposed See Here. People. international date line, imaginary line on the earth's surface, generally following the ° meridian of longitude, where, by international agreement, travelers.

The International Date Line (IDL) is an imaginary — and arbitrary .. One final historical note: During Magellan's circumnavigation. The Editors of Encyclopaedia Britannica. See Article History. Alternative Title: Date Line. International Date Line, also called Date Line, imaginary line extending. The International Date Line is located halfway around the world from the prime meridian (0° longitude) or about ° east (or west) of.






However, no attempts were made during this conference history specify the line course of the date line when it happened to cross land or pass through island groups. Its exact history was never defined by history international treaty, law or agreement.

Due to the lack of any international guide lines for the location of the date line, 20th-century map makers have tended to follow the recommendations of the hydrographic departments history the British and the American Navy.

The earliest recommendations issued date these departments referring to the date line appear to history from and Two adjustments of the date line took date in near the island chain of Hawaii and between Samoa hietory the Chatham Islands. By the non-existence line these islands had become firmly established history the date line was straightened out at that point. North history the Bering Strait, at the latitude of Wrangel Island Ostrov Vrangelya which separates the East-Siberian Sea from datd Chukchi Sea, the date line experienced some local adjustments during the early s.

Date Canadian expedition line colonize the barren island failed miserably and by the Russians had re-established their claim line settling the island with Russian-Siberian colonists. The temporary adjustment of the date line in to bisect Wrangel Date would appear date indicate the initial recognition of the Canadian claim on this island by the British Hydrographic Department.

The line of the International Date Line in note the westward excursion of the International Date Line at the latitude of Hawaii to accommodate the supposed locations of Patrocinio Island and Date Island. The location of the International Date Line in the International Line Line has been straightened at the latitude lime Hawaii and the Chatham Islands have switched to the Asian day date.

Keshav Srinivasan Keshav Srinivasan 2, 2 2 gold badges 12 12 silver badges 25 25 bronze badges. Time was kept based on sunrise, sunset and noon. The people one island over may not be intelligent enough to speak our language, but even they understand that if the sun is overhead, it is noon today, not noon yesterday or noon tomorrow.

Wallace OK, but long before the international dateline which is relatively recent , there was still the concept of days of the week. So it is still a meaningful question to ask, when it is noon on Tuesday in one place, what day of the week do people in other places in the world think it is.

You ask: Was there any place in the world where it was Tuesday morning in one location and Wednesday morning a short distance from it? Yes, that is exactly the position as it obtains today. This source should serve to answer the question In , this map was produced showing the international date line: There were places geographically nearby with different ideas of today.

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Featured on Meta. Feedback post: Moderator review and reinstatement processes. Related Hot Network Questions. Question feed. For example, if you travel the kilometers miles across the dateline from Baker Island to Tokelau you have to add 25 hours, or 1 day and 1 hour. Every day between and UTC , three different dates on the calendar are in use at the same time on Earth. Changing Sides of the Dateline The dateline is not defined by international law. Countries are free to choose the date and time zone that they want to observe.

For example, when the Republic of Kiribati gained independence from being a British colony in some of the islands were on one side of the dateline, and the rest were on the other. They corrected the anomaly in the eastern half of Kiribati by skipping January 1, and ever since Kiribati has been the first country to enter the New Year.

They did this to facilitate trade with Australia and New Zealand, and Tokelau followed Samoa for the same reasons. Topics: Timekeeping , Time Zone , Geography.

For this reason, some authorities rule that certain aspects of Sabbath observance are required on Sunday in Japan and New Zealand or Friday in Hawaii and French Polynesia in addition to Saturday.

Additionally, there are differences of opinion as to which day or days individual Jews traveling in the Pacific region away from established Jewish communities should observe Shabbat. For individuals crossing the date line, the change of calendar date influences some aspects of practice under Jewish law.

Yet other aspects depend on an individual's experience of sunsets and sunrises to count days, notwithstanding the calendar date. The date line is a central factor in Umberto Eco 's book The Island of the Day Before , in which the protagonist finds himself on a becalmed ship, with an island close at hand on the other side of the IDL. Unable to swim, the protagonist indulges in increasingly imaginative speculation regarding the physical, metaphysical and religious importance of the date line.

The main protagonist, Phileas Fogg , travels eastward around the world. He had bet with his friends that he could do it in 80 days. The next day, however, it is revealed that the day is Saturday, not Sunday, and Fogg arrives at his club just in time to win the bet. Verne explains:. In journeying eastward he [Fogg] had gone towards the sun, and the days therefore diminished for him as many times four minutes as he crossed degrees in this direction.

There are three hundred and sixty degrees on the circumference of the earth; and these three hundred and sixty degrees, multiplied by four minutes, gives precisely twenty-four hours—that is, the day unconsciously gained. In other words, while Phileas Fogg, going eastward, saw the sun pass the meridian eighty times, his friends in London only saw it pass the meridian seventy-nine times. Fogg had thought it was one day more than it actually was, because he had forgotten this simple fact.

During his journey, he had added a full day to his clock, at the rhythm of an hour per fifteen degrees, or four minutes per degree, as Verne writes. At the time, the concept of a de jure International Date Line did not exist. If it did, he would have been made aware that it would be a day less than it used to be once he reached this line. Thus, the day he would add to his clock throughout his journey would be thoroughly removed upon crossing this imaginary line.

But a de facto date line did exist since the UK, India and the US had the same calendar with different local times, and he should have noticed when he arrived to the US that the local date was not the same as in his diary his servant Jean Passepartout kept his clock in London time, despite the tips of his surroundings.

Ceremonies aboard ships to mark a sailor's or passenger's first crossing of the Equator, as well as crossing the International Date Line, have been long-held traditions in navies and in other maritime services around the world. The need for a temporal discontinuity on the globe can be described mathematically as following from the Borsuk-Ulam Theorem in dimension 1: It is a topological fact that there does not exist any continuous , one-to-one function mapping from a circle onto an interval.

From Wikipedia, the free encyclopedia. For other uses, see Dateline disambiguation. Further information: International date line in Judaism.

See also: Line-crossing ceremony. The National Geographic Magazine. Retrieved 4 January Accessed 11 August Pacific Islands Report. September Time and date. Retrieved 20 May , and click through to the individual stations' pages. With respect to Scott Base, see Ross Dependency. Retrieved 23 September Retrieved 20 May Note that this map uses the opposite sign convention for time zones from that used in Wikipedia.

Downing, "Where the day changes" , Journal of the British Astronomical Association , vol x, no 4, , pp. October, Protocols of the proceedings". Project Gutenberg. Quote is from the session of 14 October. Retrieved 30 December An illustrated manual for the use of the terrestrial and celestial globes.

New York. The transfer of territory from Russia to the United States , Executive document in Executive documents printed by order of the House of Representatives during the second session of the fortieth Congress, —'68 , vol. Sumner released the written version of his speech on Thursday, 24 May , having written it during the immediately preceding Congressional recess following notes on a single page that he actually used on Tuesday, 9 April.

Associated Press via the New York Post. Archived from the original on 31 December Retrieved 11 August