January is just odd, and has nothing but a guy with ski's on.
April isn't clear at all.
July doesn't show anything that makes sense. If it's supposed to be something to do with 4th July, I can't understand it at all.
August is just odd, I have no idea why he's in a school. (I don't know when you generally go back to school, but for me atleast, we return to school in september after the Summer Holiday)
September just looks stupid because you're just showing the Twin Towers. I have no idea what that's supposed to represent, but you don't get too many calendars that specifically show something that would be considered tragic.
October doesn't look spooky at all.
December looks horrible and has nothing christmasey about it, which is what you were going for.
They're not very good, I'm afraid.