See http://www.twinsun.com/tz/tz-link.htm which points to free source code
and a much larger database at ftp://elsie.nci.nih.gov/pub/


----- Original Message -----
From: "John Korb" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, June 03, 2002 4:03 PM
Subject: [HP3000-L] TZTAB questions


> Time zones are my latest headache.
>
> I need to have some programs handle data from multiple times zones,
> automatically determining whether Daylight Savings Time is in effect, and
> automatically taking Daylight Savings Time into account (or ignoring it).
>
> Were it not for places which don't recognize daylight savings time
> (Arizona, part of Indiana, Hawaii, Puerto Rico) I wouldn't have to worry
> about daylight savings times, but these areas don't switch to daylight
> savings time, and thus need to be accommodated.
>
> I know I can find out what the time is in Hawaii (or other non-local time
> zones) from the shell by:
>
> shell/iX> TZ="HST10"
> shell/iX> date +%H
> 09
>
> but I need find the hour (in the target time zone) from within a SPLASH!
or
> Business Basic program and I need to find it fast (the shell is at least
an
> order of magnitude too slow).
>
> Question 1:
> Is TZTAB replaced by patches or when a new version of MPE is installed?
> Since some of the time zones I need to accommodate are not listed in the
> TZTAB file, I'll need to add entries for them.  If there is a significant
> risk that the TZTAB file will be replaced by HP, I'll need to make sure my
> customized file "replaces" the HP file on a daily basis before
> production.  However, I'll also need to capture the new HP supplied file
> when it appears.
>
> Question 2:
> Is there a C library procedure (or Intrinsic that I've missed) that I can
> call from SPLASH! (or Business Basic) that lets me pass a TZ value to it
> (ex. "EST5EDT" or "HST10"), and it returns the current hour (24 hour
> format) in the specified time zone?
>
> Thanks for your help!
>
> John
>
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