- April 1, 1989
- April 2, 1989
- April 3, 1989
- April 4, 1989
- April 5, 1989
- April 6, 1989
- April 7, 1989
- April 8, 1989
- April 9, 1989
- April 10, 1989
- April 11, 1989
- April 12, 1989
- April 13, 1989
- April 14, 1989
- April 15, 1989 (This strip is used on the page for September 14 of the Dayspring Peanuts: A Year's Worth of Smiles and Blessings Desk Calendar)
- April 16, 1989
- April 17, 1989
- April 18, 1989 (The day that the episode "The Smithsonian and the Presidency" from This Is America, Charlie Brown first aired)
- April 19, 1989
- April 20, 1989
- April 21, 1989
- April 22, 1989
- April 23, 1989
- April 24, 1989 (This strip and the following strip are adapted in the episode "Always Right" from the 2014 French TV series Peanuts)
- April 25, 1989
- April 26, 1989
- April 27, 1989
- April 28, 1989
- April 29, 1989
- April 30, 1989
| ← March 1989 | May 1989→ |