Holly was at Walt Disney World during Christmastime, 1979, and sent a postcard to her class. She was really rubbing it in when she tells them it's Monday, and she is at Disney World while the rest of her schoolmates are apparently in school! Classic.
The next card was never sent, and I'm not sure of the date.
Strike Up the Band! "Drum Major Mickey Mouse leads the Walt Disney World Band down Main Street U.S.A. in one of the musical group's daily performances." This leads one to believe that, at least at one point during the day, you'll see Mickey Mouse leading the band. I am not sure if this ever happened, but I'd like to see it.
No matter what time of year you visit Walt Disney World, it's hard NOT to have a good time!