I had this oven installed 6 months ago, the first time.  I set the clock.  Within a couple of hours, the clock resets on its own to 6 hours ahead.  After multiple visits and replacement parts, they finally installed a new oven.  And now, the same thing is happening.  I'm finding it hard to believe that I am the only one with this issue, unless it is user error and there is a time zone setting which I have not found (and the GE technician didn't find either).  Can anyone assist?