[tz] Daylight saving and heart attacks

Alan Mintz alan.mintz at gmail.com
Mon Jun 24 23:31:18 UTC 2019

Another example of other, perhaps overshadowing influences, is Muslim
prayer times. For example, at 47.5 degrees north latitude, in Seattle, WA,
US: [https://www.salahtimes.com/usa/seattle]

   - On the June solstice (2019-06-21), the first prayer was at 03:11 PDT
   (UTC-7; 2 hours before sunrise) and the last prayer was at 23:11 (2 hours
   after sunset), 20 hours later.
   - On the prior December solstice (2018-12-21), the first prayer was at
   06:20 PST (UTC-8; 1.5 hours before sunrise) and the last prayer was at
   17:55 (1.5 hours after sunset), just 11.5 hours later.

On Mon, Jun 24, 2019 at 3:48 PM Phake Nick <c933103 at gmail.com> wrote:

> Spanish people life cycle is an obvious modern example for that
> 在 2019年6月24日週一 23:29,Paul Gilmartin via tz <tz at iana.org> 寫道:
>> > On Jun 24, 2019, at 1:33 PM, Paul Eggert wrote:
>> > To my mind the more-concerning health effects of daylight-saving time
>> occur not during the twice-yearly transitions, but during the time that DST
>> is in effect - which is the whole year when a location uses "permanent
>> DST". Unfortunately these effects have not been studied as much, although
>> experts are warning us that these effects are worrisomely negative …
>> The most likely consequence of "permanent DST” is that people will
>> recognize that winter mornings are too dark and health is affected and,
>> over decades, adjust their hours of activity, nullifying the effect.
>> There’s a precedent.  Reading The Parable of the Workers in the Vineyard
>> (Matthew 20:1-16 (KJV)), it appears that the modern timekeeping convention
>> is 6 hours in advance of the convention at the time of that writing.  Yet
>> people don’t begin their activities at 0100, take their siesta
>> ("6th-hour")
>> break at 0600, or retire at 11:00.  We have adjusted to the hours of
>> daylight, regardless of how they’re numbered.
Alan Mintz <Alan.Mintz at gMail.com>
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