I really only want two things out of a wall calendar: the ability to write on it, and a fresh picture every month. I'm sure someone has a non-overlapping set o

I really only want two things out of a wall calendar: the ability to write on it, and a fresh picture every month. I'm sure someone has a non-overlapping set of needs for a wall calendar, involving displaying some numbers that let you synchronize the weekday and month day, with a bit of squinting. They'll love this!