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Just a note, that with polar night comes a) long winter with sun and snow, and b) polar day.



Further, polar night in Tromsø ends around 21st of January, while the midnight sun starts around 21st of May - that's roughly 17 weeks going from the sun not rising, to the sun not setting - more than an hour of difference, week to week on average (0-24 hours, in 17 weeks).

[ed: of course, the change isn't linear: https://www.timeanddate.com/sun/norway/tromso ]




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