One thing to keep in mind is that GMT (Greenwich Mean Time) does not do
DST (Daylight Savings Time). So the QUTCOFFSET on IBM i will be one value
at one time of the year, and another value at another time of the year.
IBM i is right. You can take GMT, use the QUTCOFFSET and calculate your
However Windows is a stupid pinhead. They don't change UTC offset. You
just have to "know". This causes some real multiplatform server issues in
IBM Collaboration (aka Lotus Sametime).