- September 1, 1969
- September 2, 1969
- September 3, 1969
- September 4, 1969
- September 5, 1969
- September 6, 1969
- September 7, 1969
- September 8, 1969
- September 9, 1969
- September 10, 1969
- September 11, 1969
- September 12, 1969
- September 13, 1969
- September 14, 1969
- September 15, 1969
- September 16, 1969
- September 17, 1969
- September 18, 1969
- September 19, 1969
- September 20, 1969
- September 21, 1969 (This strip is adapted in the episode "A Day with Snoopy" from the 2014 French TV series Peanuts)
- September 22, 1969
- September 23, 1969
- September 24, 1969 (The final apperance of José Peterson)
- September 25, 1969
- September 26, 1969
- September 27, 1969 (The day that It Was a Short Summer, Charlie Brown first aired)
- September 28, 1969 (Football gag for 1969)
- September 29, 1969
- September 30, 1969