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Timezone changes between 1923 and 2023 (files.catbox.moe)

submitted 6 months ago by Blaze@reddthat.com to c/map_enthusiasts@sopuli.xyz

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[–] DarkCloud@lemmy.world 10 points 6 months ago (2 children)

Technically every 30 metres there should be a 1 second time zone adjustment.

[–] Successful_Try543@feddit.de 10 points 6 months ago* (last edited 6 months ago)

Then we'd be back in pre-railway era.

[–] derpgon@programming.dev 3 points 6 months ago (1 children)

Actually every 463 meters.

40 075km is circumference of Earth. There are 24x60x60 seconds in a day.

40 075×1 000÷(24×60 ×60) =~ 463.8

[–] Caspase8@aussie.zone 8 points 6 months ago (1 children)

Wouldn't it depend on latitude? It would be much less than 463 metres at the latitudes of Europe

[–] Successful_Try543@feddit.de 1 points 6 months ago* (last edited 6 months ago)

Yes, distance of 1" on equator (463.8 m) × cosine of latitude ~~longitude~~. This means approximately 350 m in Rome, 285,6 m in Berlin and 232 m in Helsinki. In reality a bit less, as I didn't take the ellipsoid shape of the globe into account.