Fun fact: VLC video player displays a Santa Hat during the Christmas season on Linux, Mac, Windows, BSD, and Unix from December 18th to January 1st. If you no longer want to see the Santa Hat (or it bothers you), here's how you can remove it from VLC https://www.cyberciti.biz/faq/delete-remove-santa-hat-in-vlc-player-in-windows-linux-macos/