When I change the rate for a particular date, I like to add a "Private Note" to the dates about why (Commencement, festival, whatever.) Or sometimes I need to block off dates - repairman is coming, friends staying there for a visit at the "friend" rate ($0), etc., and I'll add a note about it.
I'm co-hosting properties for two other hosts (who are also co-hosting each others' properties.) If I add a note to the calendar, can they see it? And vice versa? Or is it so private that you can only see notes you added yourself?