Diomede Islands are separated by two miles and 21 hours
Big Diomede and Little Diomede are a pair of islands in the Bering Strait that sit just two miles apart yet exist in entirely different calendar days.
The International Date Line runs directly between these two islands, creating a staggering 21-hour time difference despite their close proximity. Big Diomede belongs to Russia and sits on the western side, while Little Diomede is an American territory to the east.
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