Ok - this sounds like such a basic question and I would have thought at my age I would have (and probably should have) seen how other people hang their calendars (think monthly calendar on the back of the kitchen door) without them getting destroyed during the year and the key bit of information here is if the calendar only has a punched hole to hang by.
I'm not talking about calendars that are spiral bound and have a metal hanger built in. I'm talking about the others that just have a really small hole to hang it by. Do you start hanging by a string and keep adding string each month?
How do those sorts of calendars hang properly so you can change from month to month?