- December 1, 1998
- December 2, 1998
- December 3, 1998
- December 4, 1998
- December 5, 1998
- December 6, 1998
- December 7, 1998
- December 8, 1998
- December 9, 1998
- December 10, 1998
- December 11, 1998 (Sally develops a new philosophy)
- December 12, 1998
- December 13, 1998
- December 14, 1998
- December 15, 1998
- December 16, 1998
- December 17, 1998 (Beginning of a storyline that was later adapted in I Want a Dog for Christmas, Charlie Brown)
- December 18, 1998 (Rerun wants to name the dog Rover, possibly a reference to one of Snoopy's brothers in Snoopy's Reunion)
- December 19, 1998
- December 20, 1998 (The final time that Sally calls Linus her Sweet Babboo. This strip is adapted in Charlie Brown's Christmas Tales)
- December 21, 1998
- December 22, 1998
- December 23, 1998
- December 24, 1998
- December 25, 1998
- December 26, 1998
- December 27, 1998
- December 28, 1998
- December 29, 1998
- December 30, 1998
- December 31, 1998