- December 1, 1967
- December 2, 1967
- December 3, 1967
- December 4, 1967
- December 5, 1967
- December 6, 1967
- December 7, 1967
- December 8, 1967
- December 9, 1967
- December 10, 1967
- December 11, 1967
- December 12, 1967
- December 13, 1967
- December 14, 1967
- December 15, 1967
- December 16, 1967 (Beethoven's birthday, the third time Schroeder forgets it)
- December 17, 1967 (This strip is adapted in the episode "Nobody Likes Me" from the 2014 French TV series Peanuts)
- December 18, 1967
- December 19, 1967
- December 20, 1967
- December 21, 1967
- December 22, 1967
- December 23, 1967
- December 24, 1967
- December 25, 1967
- December 26, 1967
- December 27, 1967
- December 28, 1967
- December 29, 1967
- December 30, 1967
- December 31, 1967
