On Thu, 2005-11-10 at 08:31 -0500, Charles Mills wrote:
> I'm engaged in an internal dispute about best practice for the TOD clock:
> should it be set to universal time (or whatever GMT is now called) with the
> appropriate local offset, or alternatively, to local time (with an offset of
> zero)?

Yes, definitely set it to GMT.  This makes semiannual DST changes a
snap.  And your Unix environment wants GMT.

===

Slightly OT but an interesting thing I just noticed: our MVS console
reports the following time in response to a "D T" command:

        IEE136I LOCAL: TIME=08.46.20 DATE=2005.314  GMT: TIME=13.44.27 
DATE=2005.314

We're in the U.S. eastern time zone, five hours offset from GMT.  You'll
notice that my local time isn't exactly five hours offset from the TOD
clock -- this is because the TOD clock drifts over time (we don't have
an ETR) and we adjust the local offset every week to compensate.

I just noticed that in a Unix shell, the time is apparently derived as a
hardcoded five-hour offset from the TOD clock:

        # date                      
        Thu Nov 10 08:44:27 EST 2005

So it ~appears~ that the Unix environment (or at least the "date"
command) doesn't use the CVTTZ (or CVTLDTO) offset.

Maybe this is aparable?  Or do I have a configuration error?

-- 
David Andrews
A. Duda and Sons, Inc.
[EMAIL PROTECTED]

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