[tz] isstd and isgmt effect

[Paul Eggert]

Jason Johnson wrote:
> I'm writing some software that deals with dates and I parse Olson files to
> get time zone information.  In the tzfile man page, both entries say that
> they are used for handling POSIX-style environmental variables?
>
> Does that mean that I can ignore those values and assume the transition
> times are just UAT?

Sorry, I don't understand your question.  For starters, I don't know what "UAT" 
is.  Perhaps you could clarify by giving a specific example.