- May 1, 1979
- May 2, 1979
- May 3, 1979
- May 4, 1979
- May 5, 1979
- May 6, 1979
- May 7, 1979
- May 8, 1979
- May 9, 1979
- May 10, 1979
- May 11, 1979
- May 12, 1979
- May 13, 1979
- May 14, 1979
- May 15, 1979 (This strip is adapted as the segment "Song" in It's an Adventure, Charlie Brown)
- May 16, 1979
- May 17, 1979
- May 18, 1979
- May 19, 1979
- May 20, 1979
- May 21, 1979
- May 22, 1979
- May 23, 1979
- May 24, 1979
- May 25, 1979
- May 26, 1979
- May 27, 1979
- May 28, 1979
- May 29, 1979
- May 30, 1979 (Snoopy first appears as Blackjack Snoopy, the World Famous River Boat Gambler)
- May 31, 1979
| ← April 1979 | June 1979 → |