- April 1, 1978
- April 2, 1978
- April 3, 1978
- April 4, 1978
- April 5, 1978
- April 6, 1978
- April 7, 1978
- April 8, 1978
- April 9, 1978
- April 10, 1978
- April 11, 1978
- April 12, 1978
- April 13, 1978
- April 14, 1978
- April 15, 1978
- April 16, 1978
- April 17, 1978
- April 18, 1978
- April 19, 1978
- April 20, 1978
- April 21, 1978
- April 22, 1978
- April 23, 1978 (This strip is adapted in the episode "Not My Day" from the 2014 French TV series Peanuts)
- April 24, 1978 (Start of a series of strips which were later adapted as the episode "La belle et la bête" from the 2014 French TV series Peanuts and as the segment "Sally and Snoopy" of the 1983 The Charlie Brown and Snoopy Show episode "Linus and Lucy")
- April 25, 1978
- April 26, 1978
- April 27, 1978
- April 28, 1978
- April 29, 1978
- April 30, 1978
| ← March 1978 | May 1978 → |