- April 1, 1981
- April 2, 1981
- April 3, 1981 (Ending of a storyline that was later adapted in the segment "The Pelicans" of the 1985 The Charlie Brown and Snoopy Show episode "Snoopy's Brother Spike")
- April 4, 1981
- April 5, 1981 (Peppermint Patty gives a book report on Hans Brinker, or The Silver Skates)
- April 6, 1981
- April 7, 1981
- April 8, 1981
- April 9, 1981
- April 10, 1981
- April 11, 1981
- April 12, 1981
- April 13, 1981
- April 14, 1981
- April 15, 1981
- April 16, 1981
- April 17, 1981
- April 18, 1981
- April 19, 1981
- April 20, 1981
- April 21, 1981 (This strip is adapted in the segment "The Team" from The Charlie Brown and Snoopy Show episode "Chaos in the Classroom")
- April 22, 1981
- April 23, 1981 (Franklin's only appearance of 1981 and his last until March 14, 1983)
- April 24, 1981
- April 25, 1981
- April 26, 1981
- April 27, 1981
- April 28, 1981 (The day that It's Magic, Charlie Brown first aired)
- April 29, 1981
- April 30, 1981
← March 1981 | May 1981 → |