Person #1: "At least things should calm down over Christmas."
Person #2: "Before then. After all, the world's going to end on the 21st."
Person #1: "Again? ... Wait, if the world's ending on the 21st, why are we still here at work?"
Manager: "Because today's only the 10th!"
Manager: "Look, if the world ends on the 21st you can stay home."