There a bunch of posts about this but they don't add up since they are separate. They are also listed as Enhancements. THIS IS DEFINITELY A BUG.
I have been fighting with this lack of calendar function literally for years.
Anyone who runs repetitive classes needs this - for instance running the same class each month for four weeks, so starting in the first week of the month and ending on the fourth week, being able to schedule months in advance.
It should also block off the calendar for the instructor before anyone registers for the class.
PLEASE FIX THIS!!!!!