Colorado-based artist and Etsy seller SeeChangeDesign has a neat and stylish poster to help you keep track of the days next year. This 12"x18" Space Invaders-inspired calendar invites you to cross off alien sprites from the bottom up, each group of colored enemies representing a month.

As Technabob points out, it's not the most practical way to manage your schedule, as there's not enough room to mark future appointments/events. Also, you're going to have a devil of a time hitting the UFO for bonus points when it flies across the top screen, behind over two dozen rows of aliens.

The poster is printed on matte heavyweight paper and is on sale for $19 ($7 shipping in the U.S. and $12 in Canada). You can see more photos of the Space Invaders 2011 calendar after the break.