The Mayan calendar ends in December 21, 2012 and at the same time predicted the end of the world. The Native Americans, Egyptians, and the I Ching predicted the same date and year to be the end of the world. The uncanny part of this? All of these civilizations had no contact with each other. All of them predicted the same day and the same year that 2012 would mark the end of the world.
Now your customers can countdown to the end of the world. The clock is 4 inches wide by 2.5 inches high. Once the clock reaches Dec 21, 2012, well it does not matter once it reaches that because the world will be over. BUT just in case the world does not come to an abrupt end, it can be reset to start counting again or used as an ordinary desk clock!