Boo Boo’s Birthday is an instrumental jazz tune written by Thelonious Monk for his daughter Barbara, whose nickname Boo-Boo inspired the title. It was recorded on December 21, 1967—the first and only time Monk recorded the piece—and released in May 1968. The track is a medium-tempo piece that showcases Monk’s distinctive piano voice and sits in his late 1960s output. The original publication was handled by Thelonious Music Corp and Nell-Tone; since its release, the tune has been recorded by many artists, including Joe Henderson, Fred Hersch, and Miles Okazaki.