Re: 23.0.50; on Windows, M-x display-time-world shows the same, incorrect, time for all cities

[Jason Rumney]

Eli Zaretskii wrote:
> I don't see on my system that TZ is only read on startup.  The
> attached simple test program demonstrates that TZ can be changed
> during the program's run with expected results, at least on my XP SP2
> box.
>   
You're right. I was testing using 3 letter timezones, as per the
Microsoft docs. But in fact it needs 3 letters + offset (+ optionally 3
letters for DST). I suspect from past experience with MS libraries
though, that the DST changeover dates will not be handled properly.