With a large number of changes going on over the next few months, creating notifications every time there's going to be a long intermission is going to quickly become unmanageable.
For the time being at least, you should be prepared for the fact that any intermission might be longer than normal without notice. By "longer than normal" I generally mean "about 30 minutes" but it might be anything from ten minutes to a couple of hours (very very rarely) depending on what we're doing at the time.
Thanks for your patience and understanding.
PS. Tonight's intermission will almost certainly be longer than normal.