Keep Calm and Carry On was initially created as a motivational poster by the British government. The poster was printed right before World War II and was intended to raise the morale of the British residents. It was buried in history for years until the early 2000s when a British shop owner found the old poster and began printing them again. It has since gained popularity and has had an array of spin-offs including this zombie version. Perfect for any fan of the horror genre.