- June 1, 1980 (This strip is adapted in the segment "Kite Flying" from The Charlie Brown and Snoopy Show episode "Linus and Lucy")
- June 2, 1980
- June 3, 1980 (This strip is adapted in Why, Charlie Brown, Why?)
- June 4, 1980
- June 5, 1980 (This strip is adapted as the short "A New Best Friend" from the 2014 French TV series Peanuts)
- June 6, 1980
- June 7, 1980
- June 8, 1980
- June 9, 1980
- June 10, 1980
- June 11, 1980
- June 12, 1980
- June 13, 1980
- June 14, 1980
- June 15, 1980
- June 16, 1980
- June 17, 1980
- June 18, 1980
- June 19, 1980
- June 20, 1980
- June 21, 1980
- June 22, 1980
- June 23, 1980
- June 24, 1980
- June 25, 1980
- June 26, 1980
- June 27, 1980 (This strip is adapted for the end credits of The Peanuts Movie)
- June 28, 1980
- June 29, 1980
- June 30, 1980
| ← May 1980 | July 1980 → |