Rackham's Fairy Tales 2012 Wall Calendar is one of my top picks for a 2012 calendar. This is also a great way to get small prints of Rackham's work. If you don't write on the calendar, these also resell well once out of print for that very reason. The prices on older ones are quite fascinating although I am not tempted to sell my own copies.
Here's an image of the back so you can see all 12 images. If my memory serves me well, some of these come from Arthur Rackham's Book of Pictures which is being rereleased next month by Dover, but I will give that book its own post soon.