Out With the Old, In With the Nude.

Girly calendars are a tradition as old as cave-paintings and primitive mathematics, although for the last half-century or so, Playboy has rocketed the art form to a consistent state of magnificence.

Nerve.com is supplying a preview of the 2009 Playboy Calendar, which can be purchased for a mere ten bucks at PlayboyStore.com.

Jayde Nicole -- the 2008 Playmate of the Year and Miss December 2009 -- is just the year-end capper on a stunning stroker's dozen of Playboy centerfolds who light up the previous months.

Talk about bold lang syne!