I'm interested in this as well. Our organization is developing courses that will be deployed many times over, with a different calendar range applied in each iteration. Not only will the course start date change, but the duration of the course will change as well.
We are developing routines that will automatically update various dates in the course, and plan on contributing that code to the community. While we are not currently using the weekly format, the idea of editing the weekly course dates is very similar to what we are wanting to do.
Is anyone doing this? Does anyone have an interest in being able to do this? We want to build on anything already existing, as well as steering our development in ways that would be useful to others.
-dave