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by jasode 2423 days ago
>one of the best arguments for standard time all year around! [...], this time will be in sync with their circadian rhythm. And this can be guaranteed best with standard time.

To clarify because of possible imprecision around the word "standard". I think what you're saying is that circadian regularity is best achieved with "unchanging" time instead of "standard" time.

There's Standard (capital 'S') time where the high point of the sun roughly at ~12pm. And then there's Daylight Saving time where the high sun is roughly at ~1pm. A circadian rhythm can be compatible with either of those systems if it's kept the same all year long.
1 comments
Riesling 2423 days ago
Sorry for being imprecise, but I actually meant Standard Time (as in noon at about 12pm). Our circadian rhythms are not as flexible as many people think. There are many studies showing that people sleep less if the sun sets later, causing a net sleep loss with related health problems.
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tbabb 2423 days ago
> if the sun sets later

The sun sets when it sets. We are choosing what clock label to put on that moment.

Getting up an hour earlier and thinking of the same clock position as "later in the day" is exactly the same as using DST— except clock noon and solar noon won't be permanently misaligned.

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taeric 2423 days ago
You know solar noon is not necessarily noon. Right? Pretty sure it changes throughout the year, too. If so, that seems more an argument for dst. I'll check in a bit. Someone may just know, though.
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kgwgk 2422 days ago
Solar noon changes a bit through the year, but the range is just half an hour: https://www.sundials.co.uk/eot
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taeric 2422 days ago
Odd, this would seem to be a data point for DST being just half an hour.

That said, that chart is suspicious for not having jumps for DST. How does that work?

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kgwgk 2421 days ago
DST doesn’t have anything to do with the oscillation of the true noon at any location by +/-15 minutes around the year (that cycle is not even summer/winter).
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taeric 2421 days ago
How? Noon literally shifted by an hour per last night. So there should be a jump in the chart. Not a smooth line. A jump.
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