The editing areas have emacs bindings set up on them.  Tabbing from one of the time edit boxes will move focus to the next box; shift-tab will move you out of the description editing box.  Meta-return in any of the editing boxes is equivalent to clicking on enter.

   There is a preferences option which affects the interpretation of times you enter.  Assume daytime assumes any hour you enter from 8 to 7 that doesn't have an AM or PM on the end to be in the range 8AM-7PM.  If assume daytime is not selected, then 24-hour format is assumed for times without AM/PM.  (AM/PM is not case sensitive; only A/P are required.)

   The edit menu is totally nonfunctional.