Magnetic Refridgerator Christmas Tree and Ornaments Advent Countdown Calendar Spread holiday excitement throughout the house with the Magnetic Countdown Calendar. This calendar puts a new spin on the traditional advent calendar and gets everyone in the Christmas spirit as it keeps them informed of how long they have to wait until the big day. Put the 5-piece tree together on your refrigerator, dishwasher, or other large magnetic surface. Then decorate the tree with an ornament each day, starting with the first of December and ending on the 25th with the star for the top. 16" x 13-1/2".