Lots of ugly Christmas sweaters, instructions for making your own, plus ugly Christmas sweater suits!

The twelve beards of Christmas — decorating ideas.

In the Christmas in Other Cultures category, here’s a Klingon Christmas carol. Also, Sweden’s bizarre tradition of watching Donald Duck (Kalle Anka) cartoons on Christmas Eve and why Japan is obsessed with Kentucky Fried Chicken on Christmas.

Before Seinfeld: the origins of Festivus, plus my favorite Festivus song.

Some excellent animated Christmas-lights displays.

How NORAD’s Santa tracker works.

ICYMI, Friday’s links are here and include fetching-challenged dogs, a gallery of animals trying to stay warm, some history and science of poinsettias and mistletoe, and a set of funny warming labels.