- January 1, 1978
- January 2, 1978 (Beginning of a storyline that was later adapted in She's a Good Skate, Charlie Brown. The third reference to Mr. Frick)
- January 3, 1978
- January 4, 1978
- January 5, 1978
- January 6, 1978
- January 7, 1978
- January 8, 1978 (This strip is adapted in the episode "A Hard Winter" from the 2014 French TV series Peanuts)
- January 9, 1978 (Marcie does not appear without glasses again until the strip from February 16, 1980)
- January 10, 1978
- January 11, 1978
- January 12, 1978
- January 13, 1978
- January 14, 1978
- January 15, 1978
- January 16, 1978 (This strip is adapted in She's a Good Skate, Charlie Brown)
- January 17, 1978
- January 18, 1978 (Beginning of a storyline adapted in the segment "Sally at School" of the 1983 The Charlie Brown and Snoopy Show episode "Chaos in the Classroom")
- January 19, 1978
- January 20, 1978
- January 21, 1978
- January 22, 1978
- January 23, 1978
- January 24, 1978
- January 25, 1978
- January 26, 1978
- January 27, 1978 (Ending of a storyline adapted in the segment "Sally at School" of the 1983 The Charlie Brown and Snoopy Show episode "Chaos in the Classroom")
- January 28, 1978
- January 29, 1978
- January 30, 1978
- January 31, 1978
| ← December 1977 | February 1978 → |