I purchased this Martha Stewart Everette Magnetic Dry Erase Monthly Calendar a while ago to mark important dates throughout the week and weekend and to record our monthly business plans.
I mounted it in my office so we can see everything, and it was so easy to hang.
This was delivered with a wood frame and requires two screws to be drilled into the wall.

Additionally, the board itself is magnetic, which is a huge plus. It has an additional cork board on the side where I can pin any important notes, and the squares are the ideal size for writing anything I need. 
Overall, I'm really enjoying using this and find it really helpful for time management.