Third Friday in December - National Ugly Christmas Sweater Day encourages everyone to wear the ugliest sweater they have - bells, lights, whistles & all.
On December 25th, Christmas is observed around the world. Also known as Christmas Day, the annual celebration is a derivative of the Old English Crīstesmæsse which means Christ's Mass.
Christmas Eve on December 24 kicks off a series of holiday traditions. Some are ancient practices with a modern spin, while others date back hundreds of years.