13/13/13

For a thousand years, man has been adding a day to the calendar every 4 years and, in doing so, violated mankind's interpretation of the Mayan Calendar's prediction that the world would end in 2012. On the 13th day of the 13th month of the new millennium, survivors confront a world of demons. On 13-13-13, the entire human race, except for those born on a leap year, goes insane. Those born on a leap year are stuck to battle the demons.