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Arizona Has Nested Daylight Savings Time
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this post was submitted on 06 Nov 2026
137 points (98.6% liked)
Mildly Interesting
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An extraterrestrial visiting Earth would scratch its head in wonder.
What makes you think we have heads?
If they have a home planet that rotates and also has a tiled axis, they probably have their own time weirdness. If entities are on different sides of the planet from each other and want to use "small numbers" for time everywhere, they'll probably be doing something similar.
As sensible as it would be to use a single clock for a planet, it isn't really person compatible. It's why the US still uses Fahrenheit for temperatures. Celsius is more sensible, but for a person 0=cold and 100=injury and death is too wide. Fahrenheit's 0=cold and 100=uncomfortable is appealing.
That probably explains why so many people and countries have adopted Fahrenheit ๐
Probably not because they would have seen our tilted axis on the way in.
That still doesn't explain what's happening in Arizona.
You have to have more darkness at some point in the day during winter, there's no getting around it. Arizona just made a choice to have darker mornings in lieu of no clock changes.
And to be fair they are further south so the daylight isn't quite as scarce as it is in more northern states. I think getting rid of the clock changes makes a bit more sense the further south you go.
I can see the argument for DST or no DST. I can even sort of see the argument for DST matching the economic powerhouse a few hundred miles away. But there is nothing in planetary physics to justify 3 different time zone usages in such a small area, with major cities being on a different one than all the area around them, or for one quadrant to be (mostly) different from the rest of it.
Moreover, there is only a 2 hour shift of sunrise/sunset from the peak of summer to the depths of winter. That's barely enough to justify the hassle of DST in my opinion.
Timezones should be diagonal lmao
And change over the year!
You can see the timezone difference in that second map! And the white line at the north of the Nordics going up and down! This is so fascinating, what's the source?
https://www.reddit.com/r/dataisbeautiful/comments/k0segs/sunsetsunrise_times_in_europe_summerwinter_oc/
Thanks!