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The international date line, explained | Live Science

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The international date line is an imaginary line that runs north-south across the Pacific Ocean from the North Pole to the South Pole.

An illustration of the International Date Line. (Image credit: Dan Heim.) Jump to category: Why the IDL is important What happens when you cross it? How the IDL began Why isn't it straight? Universal Coordinated Time Additional resources Share Copy link Facebook X Reddit Pinterest Flipboard Share this article Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter The international date line (IDL) is an imaginary line that runs along the Earth's surface from the North Pole to the South Pole in the middle of the Pacific Ocean. When you cross

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