Black and gray image of a castle in front of the number '10' written in blue, pink, red, and orange stripes. The center of the number 0 is solid yellow, resembling a sun. Blue text below the image with black Mickey Mouse logo inside the letter 'D' on a white background.
The Magic Kingdom, part of Walt Disney World in Orlando, FL, celebrated its 10 year anniversary in 1981. This anniversary was celebrated from October 1, 1981 to September 30, 1982 when the new Epcot park opened. The celebration included a special parade, performers, and a Main Street Birthday Party show in front of Cinderella's Castle.
Source: Travel/USA Today (2011). Celebrating Four Decades of Walt Disney World.