National Ugly Christmas Sweater Day is celebrated worldwide every third Friday of December. Launched in 2011 by a group of ugly Christmas sweater enthusiasts, the holiday encourages people to wear the ugliest Christmas sweaters they can find to embrace the festive spirit. Participants often search for or create their own hideous sweaters using various decorations like tinsel, bells, and fairy lights. The day promotes lighthearted fun, allowing individuals to dress and behave sillily without judgment. In addition to wearing their sweaters, people can share the experience with family and friends by hosting ugly sweater parties or taking festive photos. The holiday also supports charitable causes, with the official charity being Save the Children’s “Make the World Better with a Sweater” campaign.