NBC News:

More than 30 Michigan schools closed for the holidays two days early, in part because the Mayan calendar predicts the world will end on Friday, an official said.

Matt Wandrie, superintendent for Lapeer Community Schools, said doomsday “rumors” are running rampant in several districts, adding to fears raised by last week’s school shooting in Newtown, Conn.

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He noted that Twitter was lighting up with posts with sentiments like: “Friday would be a great day to go out w/ a bang.”