The Trouble with Time

Maybe all you faithful readers out there can help Jeni and I out by settling an argument we've been having over the last couple moments.  It has to do with the concept of time.  For the sake of an example, let's say you have a 1:00 pm appointment.  You would like to change this appointment.  If you "move it up" 30 minutes, what time is the appointment?  What if you "push it back" 30 minutes?  We both use "push it back" and "move it up" in opposite ways.  I won't tell you which one thinks which way, just that I'm confident my way is the right way.  Please leave a comment about which way you see it and help us settle this once and for all.