- April 1, 1977 (The final appearance of Austin)
- April 2, 1977 (End of a storyline that was adapted as the "Kite" segment in It's an Adventure, Charlie Brown and the final appearance of Milo)
- April 3, 1977
- April 4, 1977
- April 5, 1977
- April 6, 1977
- April 7, 1977
- April 8, 1977
- April 9, 1977
- April 10, 1977 (The fifth time that Snoopy appears as the Easter Beagle in the strip. This strip is adapted in the segment "Snoopy's Story" from The Charlie Brown and Snoopy Show episode "Sally's Sweet Babboo")
- April 11, 1977
- April 12, 1977
- April 13, 1977
- April 14, 1977
- April 15, 1977
- April 16, 1977
- April 17, 1977 (The first time that Lucy is seen in a sweatshirt and trousers. This strip is adapted in the segment "Rainy Day" of the 1983 The Charlie Brown and Snoopy Show episode "It's That Team Spirit, Charlie Brown")
- April 18, 1977
- April 19, 1977
- April 20, 1977
- April 21, 1977
- April 22, 1977
- April 23, 1977
- April 24, 1977
- April 25, 1977
- April 26, 1977
- April 27, 1977
- April 28, 1977
- April 29, 1977
- April 30, 1977
| ← March 1977 | May 1977 → |