- December 1, 1983
- December 2, 1983 (This strip is adapted in It's Christmastime Again, Charlie Brown)
- December 3, 1983 (The day that the episode "It's That Team Spirit, Charlie Brown" from The Charlie Brown and Snoopy Show first aired)
- December 4, 1983 (This strip is adapted in the segment "Friends" from The Charlie Brown and Snoopy Show episode "Snoopy's Robot")
- December 5, 1983
- December 6, 1983
- December 7, 1983
- December 8, 1983
- December 9, 1983
- December 10, 1983 (The day that the episode "Lucy Loves Schroeder" from The Charlie Brown and Snoopy Show first aired)
- December 11, 1983
- December 12, 1983
- December 13, 1983
- December 14, 1983
- December 15, 1983 (Beginning of a storyline which was later adapted in It's Christmastime Again, Charlie Brown and as the segment "The Play" of the 1985 The Charlie Brown and Snoopy Show episode "Sally's Sweet Babboo")
- December 16, 1983 (The first reference to Harold Angel)
- December 17, 1983
- December 18, 1983 (This strip is adapted in the segment "Snoopy's Trick" from The Charlie Brown and Snoopy Show episode "Peppermint Patty's School Days" and in the shorts "Hissez le menu" and "Don't Worry, Charlie Brown" from the 2014 French TV series Peanuts)
- December 19, 1983
- December 20, 1983
- December 21, 1983
- December 22, 1983
- December 23, 1983
- December 24, 1983 (Harold Angel's first appearance. Ending of a storyline which was later adapted in It's Christmastime Again, Charlie Brown)
- December 25, 1983
- December 26, 1983
- December 27, 1983
- December 28, 1983
- December 29, 1983
- December 30, 1983 (This strip is adapted in Happy New Year, Charlie Brown!)
- December 31, 1983
← November 1983 | January 1984 → |