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Geography

The Significance of the International Date Line in Global Timekeeping

Quick fact

The International Date Line is not a straight line; it zigzags around island nations to keep entire countries on the same date, and it is a political convention as much as a geographical one.

Why this is interesting

If you travel east across the Pacific Ocean, you might suddenly 'lose' a day. But go west, and you can gain one back. How is that possible without a time machine?