Somehow a bunch of stuff has gotten onto my calendar and I just want
to start over. anyone know how to delete everything on it?
Hit cmd-opt-F when in calendar view, to bring up the 'advanced find' window.
Do a Find for events whose subject contains "a" OR subject does not contain
"a" - this will find every event (there may be a custom view already created
called 'all events', which you could use instead).
Select an event, then do a 'select all' and hit the delete key. All events
will be deleted.