Nothing to do with Christmas. Before moving to Charlotte, NC in 1979, I lived in "upstate" New York near Rhinebeck, NY were the [link|http://www.oldrhinebeck.org/|Old Rhinebeck Aerodrome] is located. The Old Rhinebeck Aerodrome was and appears to still be a living museum of sorts. Back then on summer weekends, Cole Palen dressed as the [link|http://www.theaerodrome.com/aces/germany/richthofen1.html|Red Baron] would fly a [link|http://www.theaerodrome.com/aircraft/germany/fokker/dri.html|Fokker tri-plane] and a fellow named David Fox would fly a [link|http://www.theaerodrome.com/aircraft/gbritain/sopwith/camel.html|Sopwith Camel] and have dog-fight. Davis Fox had a small Snoopy figurine in model airplane attached to the top of his helmet. Disregarding the summer season, they played the song over the PA system.
The Fokker was painted red and had a Maltese cross to match that of the Red Baron. Both planes had rotary engines where the crankshaft is fixed and the engine (with attached propeller) rotates.