Space Invaders 2011 Calendar
The whole year is shown on one sheet, measuring 12 inches by 18 inches with each row of space invaders representing two weeks. Each alien is numbered with the date and you can cross them out with a marker pen when the date has passed, which is supposed to replicate zapping them as you would in the old arcade game.
The calendar costs $19 (around £12.30) from SeeChangeDesign on Etsy.
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