- May 1, 1965 (This strip is adapted in Charlie Brown's All-Stars)
- May 2, 1965
- May 3, 1965
- May 4, 1965 (The first reference to the Daisy Hill Puppy Farm Beginning of a storyline that was later adapted in Snoopy's Reunion)
- May 5, 1965 (The first reference to Snoopy having several siblings)
- May 6, 1965
- May 7, 1965
- May 8, 1965
- May 9, 1965
- May 10, 1965
- May 11, 1965
- May 12, 1965
- May 13, 1965
- May 14, 1965
- May 15, 1965
- May 16, 1965
- May 17, 1965 (This strip is adapted in Charlie Brown's All-Stars)
- May 18, 1965
- May 19, 1965
- May 20, 1965
- May 21, 1965
- May 22, 1965
- May 23, 1965
- May 24, 1965 (Start of a series of strip that is adapted in He's Your Dog, Charlie Brown, the 1983 The Charlie Brown and Snoopy Show episode "Snoopy: Man's Best Friend" and the episode "L'amour du risque" from the 2014 French TV series Peanuts)
- May 25, 1965
- May 26, 1965
- May 27, 1965
- May 28, 1965
- May 29, 1965
- May 30, 1965
- May 31, 1965
| ← April 1965 | June 1965 → |
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