- September 1, 1955
- September 2, 1955
- September 3, 1955
- September 4, 1955
- September 5, 1955
- September 6, 1955
- September 7, 1955
- September 8, 1955
- September 9, 1955
- September 10, 1955
- September 11, 1955
- September 12, 1955
- September 13, 1955
- September 14, 1955
- September 15, 1955 (Linus speaks to another character in a full sentence for the first time)
- September 16, 1955
- September 17, 1955
- September 18, 1955
- September 19, 1955
- September 20, 1955
- September 21, 1955
- September 22, 1955
- September 23, 1955
- September 24, 1955
- September 25, 1955 (The gag in the title panel is recycled from the Li'l Folks strip from June 26, 1949)
- September 26, 1955
- September 27, 1955
- September 28, 1955
- September 29, 1955
- September 30, 1955