- June 1, 1968
- June 2, 1968
- June 3, 1968
- June 4, 1968
- June 5, 1968
- June 6, 1968
- June 7, 1968
- June 8, 1968
- June 9, 1968
- June 10, 1968
- June 11, 1968
- June 12, 1968
- June 13, 1968
- June 14, 1968
- June 15, 1968
- June 16, 1968
- June 17, 1968 (This strip is adapted in It Was a Short Summer, Charlie Brown)
- June 18, 1968 (Sophie, Clara, and Shirley make their first appearances)
- June 19, 1968
- June 20, 1968
- June 21, 1968
- June 22, 1968
- June 23, 1968 (This strip is adapted in A Boy Named Charlie Brown and the segment "The Blanket" from The Charlie Brown and Snoopy Show episode "You Can't Win, Charlie Brown")
- June 24, 1968
- June 25, 1968
- June 26, 1968 (Peppermint Patty is called "sir" for the first time, not by Marcie but by Sophie)
- June 27, 1968
- June 28, 1968
- June 29, 1968
- June 30, 1968
| ← May 1968 | July 1968 → |