- April 1, 1960 (This strip is adapted in Good Grief, Charlie Brown: Peanuts, with Lucy replacing Violet)
- April 2, 1960
- April 3, 1960 (This strip is adapted in the segment "Rainy Day" from The Charlie Brown and Snoopy Show episode "It's That Team Spirit, Charlie Brown". Lucy replaces Shermy)
- April 4, 1960
- April 5, 1960
- April 6, 1960
- April 7, 1960
- April 8, 1960
- April 9, 1960
- April 10, 1960
- April 11, 1960
- April 12, 1960
- April 13, 1960
- April 14, 1960
- April 15, 1960
- April 16, 1960
- April 17, 1960 (This strip is adapted in A Charlie Brown Celebration, in the segment "Piano" of the 1983 The Charlie Brown and Snoopy Show episode "Snoopy's Football Career", in Happiness is a Warm Blanket, Charlie Brown and in the episode "Just for Love" from the 2014 French TV series Peanuts)
- April 18, 1960
- April 19, 1960
- April 20, 1960
- April 21, 1960
- April 22, 1960
- April 23, 1960
- April 24, 1960 (This strip is adapted in the segment "The Team" from The Charlie Brown and Snoopy Show episode "Chaos in the Classroom")
- April 25, 1960 (Peanuts merchandise bearing the "Happiness is.." phrase became very popular in the 1960s)
- April 26, 1960
- April 27, 1960
- April 28, 1960
- April 29, 1960
- April 30, 1960
