I am obsessed with my new Marta Stewart Everette Magnetic Monthy Dry ERase Reusable Calendar! It helps me keep all my important dates and appointments in one place is a Stylish reusable calendar that looks great with my decor. It's beautifully made with a woodgrain frame, mounting hardware, two magnets, and a dry-erase marker. I love that it's reusable, simply wipe it clean with a dry cloth.  Measurements are 18" X 18". 
I highly recommend the Martha Stewart Everette Magnetic Monthly Calendar Dry Erase Board.