In the hallway outside of the kids’ rooms, there hangs a calendar.
I bought it in a teachers’ supply section of an office store. It was designed to hang on a bulletin board so that you could use staples or thumbtacks to hang it up.
This hangs on the hall wall. We use tape. I tried to use that sticky gum stuff so that it wouldn’t rip the base or the numbers, but Johnathan ate it.