September 1, 1973 September 2, 1973 September 3, 1973 (This strip was published on the day of the debut of Heathcliff )September 4, 1973 September 5, 1973 September 6, 1973 September 7, 1973 September 8, 1973 September 9, 1973 September 10, 1973 September 11, 1973 (Miss Othmar , who was previously fired in the strip from February 28, 1969 , is evidently rehired. This strip is adapted in the 1988 TV special, Snoopy!!! The Musical September 12, 1973 (This strip is adapted in the segment "Peppermint Patty" from The Charlie Brown and Snoopy Show It's That Team Spirit, Charlie Brown ")September 13, 1973 (This strip and the following strip are adapted in the segment "Sally and Snoopy" from The Charlie Brown and Snoopy Show Linus and Lucy ")September 14, 1973 September 15, 1973 September 16, 1973 September 17, 1973 September 18, 1973 September 19, 1973 September 20, 1973 September 21, 1973 (This strip would be used in the 2014 French TV series Peanuts as a bumper and also would be adapted as well as the following strip in the segment "Woodstock" from The Charlie Brown and Snoopy Show Snoopy's Cat Fight ")September 22, 1973 September 23, 1973 September 24, 1973 (Beginning of a storyline that was later adapted as the segment "Peppermint Patty" of the 1983 The Charlie Brown and Snoopy Show Lucy vs. the World ")September 25, 1973 September 26, 1973 September 27, 1973 September 28, 1973 September 29, 1973 September 30, 1973
