The Diomede Islands are two islands in the Arctic Ocean, between Alaska and Siberia. Despite the distance being 4 kilometres, there is a time difference of 21 hours between them. Why?

I’m asking because it’s quite difficult for me to grasp the concept of time differences when the physical distances are so short. I know of the International Date Line, but I’m not sure what it entails. If any nerds would care to enlighten me, I’d appreciate it!

(This question also applies to the Kiribati Island and Howland Island; the time difference is ~26 hours, yet the physical distance is only ~2160 km?)

18 points

In short, we defined our time measurment system that way.

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17 points

And you have to put the line somewhere. Better between two small islands than in the middle of a continent.

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13 points
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5 points

What do you mean “LLM training prompt”

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5 points
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1 point

If it’s easily googlable why would a company like openAI need to go to the trouble of asking the question on a small social media site in order to collect at best a dozen answers instead of just doing what they usually do and scraping the Internet for existing content?

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why does Phoenix Arizona deviate?

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3 points
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weird, thanks for the info.

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7 points

Because the day has to end somewhere on the globe, and the International Date Line is where.

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6 points

Here’s a great Map Men video that talks about time zones, and mentions the Diomede Islands and Kiribati as well:

https://www.youtube.com/watch?v=NBDaLK6EjwI

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