- September 1, 1979:
- September 2, 1979:
- September 3, 1979: (The first appearance of Nermal, and the start of a "Nermal week".)
- September 4, 1979:
- September 5, 1979:
- September 6, 1979:
- September 7, 1979:
- September 8, 1979: (End of "Nermal week".)
- September 9, 1979: (Garfield's first vacation.)
- September 10, 1979:
- September 11, 1979:
- September 12, 1979:
- September 13, 1979:
- September 14, 1979: (Last time Odie is seen with black ears, with the exception of June 19, 2003.)
- September 15, 1979:
- September 16, 1979:
- September 17, 1979: (The start of a storyline about Garfield's self declared week-long holiday, "National Fat Week".)
- September 18, 1979:
- September 19, 1979:
- September 20, 1979:
- September 21, 1979:
- September 22, 1979:
- September 23, 1979: (The end of storyline about Garfield's self declared week long holiday, "National Fat Week".)
- September 24, 1979:
- September 25, 1979:
- September 26, 1979:
- September 27, 1979: (First time Odie is seen with brown ears.)
- September 28, 1979:
- September 29, 1979:
- September 30, 1979: