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Re:RFC 3339 vs. ISO 8601 by dijit on Sunday September 07, 2025 @04:15AM (#45156378)
No, timezones don’t change but they are swapped out by countries, offsets and timezones are an n:1 mapping. Multiple timezones represent the same offset, but those offsets are immutable.

CEST will always be +2 UTC (unless something really changes politically).

DST just marks that Sweden changes from CEST to CET from October to May.

Re:RFC 3339 vs. ISO 8601 by KronisLV on Sunday September 07, 2025 @04:32AM (#45156451)
At that point, just give me

  2025-09-07T11:30:31.304[Europe/Riga]
the machine can figure out the current offset and GMT itself because in any given time in the year I have no idea without looking it up.
Re:RFC 3339 vs. ISO 8601 by umanwizard on Sunday September 07, 2025 @07:04AM (#45157136)
That’s wrong or at least not normally how the term “time zone” is used. We would typically say that Sweden is in one time zone whose offset changes twice a year.
Re:RFC 3339 vs. ISO 8601 by dijit on Sunday September 07, 2025 @08:14AM (#45157502)
so CEST is what?
Re:RFC 3339 vs. ISO 8601 by umanwizard on Sunday September 07, 2025 @01:52PM (#45160524)
An offset from UTC.

Wikipedia calls it "the standard clock time observed during the period of summer daylight-saving in those European countries which observe Central European Time (CET; UTC+01:00) during the other part of the year."

Note the word "zone" does not appear in the above.

Re:RFC 3339 vs. ISO 8601 by yencabulator on Monday September 08, 2025 @04:30PM (#45173551)
Re:RFC 3339 vs. ISO 8601 by rocqua on Monday September 08, 2025 @02:58AM (#45165352)
There is the timezone "Amsterdam". That isn't a fixed offset.