Re: Converting local time to another time zone

[rick baird <rick.baird@xxxxxxxxx>]

Chuck and Carsten - PERFECT.

I tried to google it, but came up empty at first attempt.

Thanks to you both, and Scott too.  That's exactly what I needed!

On Thu, Apr 11, 2013 at 4:37 AM, Flensburg, Carsten <Flensburg@xxxxxxxxxx>wrote:

> Hey Rick,
>
> You can use the Retrieve Time Zone Description (QWCRTVTZ) API to
> retrieve a list of all time zones on the system as well as the
> associated time zone information:
> http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/apis/qwcrtvtz.htm
>
> -Carsten
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rick baird
> Sent: 10. april 2013 23:09
> To: Midrange Systems Technical Discussion
> Subject: Converting local time to another time zone
>
> hey all,
>
> I'm writing a service program where I will convert local time to another
> time zone - or vise versa and return it. Basically, I need to know what
> time it is somewhere else (a predefined remote location), or what time
> it is locally based on a time in another time zone.  Yes, this will
> include areas that do not observe daylight savings time.
>
> I will store the time zone for each individual remote location in a file
> and retrieve the local time zone from system value QTIMZON.  Once I do
> that, I can do the time math, provided I know the UTC offset.
>
> My questions are these:
>
> Is there an api I can use (V5R4 and lower) to retrieve the list of valid
> time zones listed in the WRKTIMZON?
>
> Can I somehow retrieve the UTC offset for a particular time zone?
> According to the help, this offset does not self adjust for daylight
> savings time, so are the dates the time zone springs forward and back
> stored somewhere?  How does the operating system know how to spring
> forward and back? Is that only stored for local time, or by time zone?
>
> I'm hoping to not have to store the time zones, offsets and DST dates
> myself if I can help it, but if that's the best way to go, then I need
> to get started on that.
>
> Thanks!
>
> Rick
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