This forum answer included these cool graphs and a good explanation.
this post was submitted on 16 Sep 2023
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Today I learned
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Having grown up north of the arctic circle, this is a common fact of life. In mid summer, the sun never completely sets before it rises again. Blows my mind that this change are too subtle to notice closer to the equator.
And here at the equator it’s the opposite. Our days are almost always 12 hours long. They only vary by an hour or so throughout the year. Same temperature all year too.
And night/morning comes fast. When I've been to places near the equator, it always catches me off-guard. I'm used to daylight only beginning to dim, and thinking, "ah, I need to account for it being dark outside in a couple hours".
Not so near the equator, sunlight just turns off abruptly.
it would be interesting to see these graphs on the same y-axis scale to show the relative time differences between latitudes.