- December 1, 1973
- December 2, 1973 (This strip is adapted in It's Your First Kiss, Charlie Brown)
- December 3, 1973
- December 4, 1973
- December 5, 1973
- December 6, 1973
- December 7, 1973
- December 8, 1973
- December 9, 1973 (The fourth reference to Citizen Kane in Peanuts. This strip is referenced in the one from October 8, 1995)
- December 10, 1973
- December 11, 1973 (The gag of Lucy being hit with a typewriter is used in The Peanuts Movie)
- December 12, 1973
- December 13, 1973
- December 14, 1973
- December 15, 1973
- December 16, 1973 (Beethoven's birthday. This strip is adapted in Race for Your Life, Charlie Brown)
- December 17, 1973
- December 18, 1973
- December 19, 1973
- December 20, 1973 (Beginning of a storyline that was later adapted as the segment "The Play" of the 1985 The Charlie Brown and Snoopy Show episode "Sally's Sweet Babboo")
- December 21, 1973
- December 22, 1973
- December 23, 1973
- December 24, 1973
- December 25, 1973
- December 26, 1973
- December 27, 1973 (This strip is adapted in Someday You'll Find Her, Charlie Brown)
- December 28, 1973
- December 29, 1973
- December 30, 1973
- December 31, 1973
