@John, am I correct that if they are west of Greenwich (the Americas, 
basically) they've got a real problem if the TOD clock is set to local time and 
they want to "make it right"? Basically, they have to let the box sit idle for 
five or more hours so that actual UTC time catches up to their previous TOD 
clock setting, and DB2 does not step all over itself?

If OTOH they are in the UK or east of Greenwich (EMEA, Asia) then things are 
much simpler: just set the TOC clock correctly, set the timezone, and go, 
correct?

Charles

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of John McKown
Sent: Tuesday, November 08, 2016 6:17 AM
To: [email protected]
Subject: Re: Time Change Problem #1398

On Tue, Nov 8, 2016 at 7:52 AM, Christopher Brown <[email protected]> wrote:

<snip > 

If you have no timezone parameter in the CLOCK member, then the local time will 
be set to the "UTC" time as shown in the above message.​

Your client is wallowing in the deep, dark past. DB2 logs run off of the TOD 
clock (usually set to UTC) and pays _no_ attention to the local time.
The same with IMS. CICS does pay attention to the local clock, but a simple 
CEMT PERFORM,RESET command will fix that right up. Or simply recycle the CICS 
region (likely what your client does if they run CICS<shudder>). UNIX processes 
are "who knows" but given what you've said, I'd think it likely the client 
doesn't do much with UNIX.

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