If you have z machines which are capable of STP then there is an option to 
automatically change the time at the appointed hour since it is using NTP as 
well.

___________________________________________
Jim Petersen
MVS - Lead Systems Engineer
Home Depot Technology Center
1300 Park Center Drive, Austin, TX 78753
www.homedepot.com
email:[email protected]
512-977-2615 direct
512-977-2930 fax
210-859-9887 cell phone


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of 
Chase, John
Sent: Tuesday, March 29, 2011 8:05 AM
To: [email protected]
Subject: Re: Summer Time, "state of art"

> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Petersen, Jim
>
> It isn't the operating system that has the problem.   It is the poorly
written application programs
> which do not use the GMT time for their time stamps in whatever data
records they are recording.
> Instead, way back when, they decided to use LOCAL time and then do
computations on that LOCAL time
> field against CURRENT LOCAL time which gets them into trouble during
the FALL BACK time change.

z/OS still requires "manual" updating of the TIMEZONE parm (at minimum)
at each time change.  The other systems with which I'm familiar all do
that automatically.

    -jc-

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