[iso1631]

ISO 8601 only allows timezones as offsets, not as locations.

If it allowed "Africa/Cairo" instead of "+0200" that would be fine.

> they could hypothetically (if you want to be literal-minded about it) change the law to make DST happen on absolutely any day of the year or not at all.

That's the whole point - that's why you store future date/times with the location, not the offset, and not in UTC

[phiresky]

There's an extension to ISO8601 that fixes this and is starting to become supported in libraries:

    2019-12-23T12:00:00-02:00[America/Sao_Paulo]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...