🚀 go-pugleaf

"Dennis Jones" <nospam@nospam.com> wrote in message
news:42cec603$1@newsgroups.borland.com...
> Hi,
>
> So, I have two questions:
>
> 1) How does one get timezone information about OTHER timezones?
> 2) Assuming it is possible to get the source/target timezone information,
> what do you do when you are running on an OS that doesn't have
> TzSpecificLocalTimeToSystemTime?

I found my own answers:

1) HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\TimeZones
2) Source code from WINE

But a new problem arises:

Several timezones have the same offset from UTC, but have differing rules
for dealing with standard/daylight times.  So, if your sole piece of
information about a timezone is its offset from UTC, you have an ambiguity
for which there is no resolution.  For instance, if you have -0700, there is
no way to know if that refers to Mountain Standard Time (which adjusts for
daylight savings) or US Mountain Standard Time (Arizona, which does not
adjust for daylight savings).  Sigh.

- Dennis