Logbook Pro gives you total control of the time zone handling in your application. Time zones are only relevant for "OOOI" fields (Out, Takeoff "Off", Landing "On", and In). Data is always stored in UTC, the time zone is for input and display only.
...
Settings/Synchronization also provides a time zone option to allow you to control what time zone the values use when sent to Logbook Pro Desktop. Logbook Pro Desktop is not time zone aware so set the times accordingly (UTC recommended) for use in Logbook Pro Desktop.