Penguins (as with certain other apparently-common Xmas Jumper designs) are not the first thing we’d have associated with Christmas… The closest association we can make is that penguins live in cold temperatures (it’s either the North Pole or the South Pole – whichever Polar Bears don’t live in), and it’s cold around Christmas-time. Nevertheless, there are a bunch of Christmas Jumpers featuring penguins with Santa Hats, and that’s just fine.