- April 1, 1957
- April 2, 1957
- April 3, 1957
- April 4, 1957
- April 5, 1957
- April 6, 1957
- April 7, 1957 (This strip is adapted in Happiness Is a Warm Blanket, Charlie Brown)
- April 8, 1957
- April 9, 1957
- April 10, 1957
- April 11, 1957
- April 12, 1957
- April 13, 1957 (This strip is one of many adapted into the few minutes of animated segments in the TV Documentary of "A Boy Named Charlie Brown" from 1963.)
- April 14, 1957
- April 15, 1957
- April 16, 1957
- April 17, 1957
- April 18, 1957
- April 19, 1957
- April 20, 1957
- April 21, 1957
- April 22, 1957
- April 23, 1957
- April 24, 1957
- April 25, 1957
- April 26, 1957
- April 27, 1957
- April 28, 1957(This strip is adapted in It's Arbor Day, Charlie Brown)
- April 29, 1957
- April 30, 1957
| ← March 1957 | May 1957 → |
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