Days and Nights Waiting is a Keith Jarrett composition that gained fame through the Charles Lloyd Quartet. It’s described as an lively early Latin jazz tune built on a 32-bar AABA form, with II–V harmonies that give soloists wide improvisational freedom. The best known recording is the Charles Lloyd Quartet live at the Montreux Jazz Festival in 1967, featuring Keith Jarrett, Jack DeJohnette and Ron McClure. The piece appears in The Jazz Real Book as number 83, and it also shows up on Jarrett related releases such as Le Virtuose Du Piano.