Limit the calendar, ie prevent the user scrolling forward beyond a certain date. All of my work is seasonal, I like to have my product page as summer, winter etc. For example, in my winter page if I could stop people scrolling beyond the end of April that would be handy.
..or..
Limit the rates displayed. Another solution would be to specify only "winter rate" is displayed for a given calendar. That's quite powerful as I could have different rates for each different course.
This is possible now of course, all I need to do is add more "rooms" or properties for each course type and it would work. But, I'd rather not for the obvious reason that each room costs extra per month! And, the room/property rules would all be the same so I'd need to maintain multiple versions which always leads to oversights.
Obviously, beds24 isn't a course booking system but it's quite close for my purposes