The International Date Line around the antimeridian (180° longitude). The International Date Line (IDL) is the line extending between the South and North Poles that is the boundary between …

The International Date Line is a consequence of the worldwide use of timekeeping systems arranged so that local noon corresponds approximately to the time at which the sun crosses …

Dec 31, 2011 · It has been recognized as a matter of convenience and has no force in international law. Without the International Date Line travelers going westward would discover …

“There is no International Date Line. The theoretical line is 180° from Greenwich, but the line actually used is the result of agreement among the commercial steamships of the principal …

History of the International Date Line from 1844 to present map presentation arranged by World Time Zone (WorldTimeZone map may not be used or reproduced without permission or credit …

Jun 16, 2024 · The international date line, shown here as a yellow line, defines the boundary between calendar dates. The international date line, established in 1884, passes through the …

Historical positions of the International Date Line from 'Notes on the History of the Date or Calendar Line,' in The New Zealand Journal of Science and Technology, Vol. XI, pp. 385–388.

Oct 11, 2025 · A detailed guide to understanding the International Date Line (IDL), why it exists, why it isn't straight, and what happens when you cross it.

Erik de Put (Erycius Puteanus, 1574 - 1646) published a work in 1632 in which he argued for the adoption of a prime meridian running through Rome. The meridian opposite to that of Rome he …

Sep 21, 2025 · Learn about the International Date Line, its history, and how it affects global timekeeping and travel. Understand why the line exists, its anomalies, and its significance in …