Hah... I had thought of it, but I remember thinking, who would ever want that? Touche! :)
It wouldn't be too hard. For right now, though, I'd just make a few duplicate entries to get you through the next couple years until I can get in there and do it. Part of what makes it time consuming is updating the javascript of the CMS interface to have new UI elements. But I'll get it in there at some point.
I'm also considering requiring dataobject manager for the EventCalendar now. What does everyone think?