User blog comment:Kittyfire/Random Topic Blogging!/@comment-3188056-20111222224712/@comment-5151799-20111223002647

The "12th annual family Christmas special" thing was added to reference how other Christmas specials open with "Welcome to the such-and-such annual so-and-so Christmas special/parade/whatever." It isn't really their age. Dan & Swampy even said that they don't want to reveal P&F's age as they feel it's best for viewers to imagine it themselves.