This OMVS program will retrieve the UTC/local time offset from MVS. It will return the offset in a manner compatible for use with the TZ shell variable.
The following example will set the TZ variable to the UTC/Local offset from MVS.
In etc/profile or $HOME/.profile: export TZ=CET`/usr/local/bin/parmtz`
Sourcecode is distributed in distribution file parmtz.zip