The Topless Mayan Calendar

The Topless Maya Calendar! Mildly titillating end-of-the-world-sploitation! "Printed on genuine coffee stained paper, assembled by the weathered hands of a bearded man in a windowless room and tied together with bits of twine. Get yours before time runs out."

Not strictly historically accurate, but somehow captures the sexual tension inherent in virgin sacrifice. Via Digging the Dirt.