I know I should probably have put this up at the first of the year, but really, you can do this any time of the year. It's easy to put up!
Yes, I use my fridge as a calendar. It's also a great place to put chores for the kids, or just reminders . I went to Ikea and purchased a box of dry erase pens. To clean the fridge I use rubbing alcohol, and rub it off with a paper towel.
That's how easy and simple it is!