- December 1, 1988
- December 2, 1988
- December 3, 1988
- December 4, 1988 (This strip is adapted in It's Christmastime Again, Charlie Brown)
- December 5, 1988
- December 6, 1988 (This strip is used on the page for December 12 of the Dayspring Peanuts A Year's Worth of Smiles and Blessings Desk Calendar)
- December 7, 1988
- December 8, 1988
- December 9, 1988
- December 10, 1988
- December 11, 1988 (This strip is used on the page for February 1 of the Dayspring Peanuts A Year's Worth of Smiles and Blessings Desk Calendar)
- December 12, 1988
- December 13, 1988 (This strip was reprinted on December 26, 1997)
- December 14, 1988 (This strip was reprinted on December 27, 1997)
- December 15, 1988 (This strip was reprinted on December 29, 1997)
- December 16, 1988 (Beethoven's birthday)
- December 17, 1988 (This strip was reprinted on December 30, 1997)
- December 18, 1988 (This strip was reprinted on December 7, 1997)
- December 19, 1988
- December 20, 1988
- December 21, 1988
- December 22, 1988
- December 23, 1988 (This strip and the following two strips are adapted in It's Christmastime Again, Charlie Brown)
- December 24, 1988
- December 25, 1988
- December 26, 1988
- December 27, 1988
- December 28, 1988 (This strip was reprinted on November 29, 1997)
- December 29, 1988
- December 30, 1988
- December 31, 1988
← November 1988 | January 1989→ |