"Summer Night" is a popular song composed by Harry Warren with lyrics by Al Dubin in 1935. It emerged during Warren's extraordinarily prolific period as a Hollywood film composer, when he was co-writing more hit songs than any of his contemporaries and earning three Academy Awards for Best Song. The tune was first recorded by Russ Morgan's orchestra in 1936. Written as a moderate-tempo romantic ballad in the style typical of the Great American Songbook, the composition features a lyrical melody moving through carefully crafted harmonic changes across a 48-bar form, longer than the standard 32-bar structure. A defining harmonic detail appears in bar seven, where Warren wrote the melody on a pitch that establishes a particular relationship to the relative major, giving the passage a distinctive color. While "Summer Night" never achieved the popularity of Warren's most celebrated songs, it found an enduring place in the jazz repertoire thanks in large part to Miles Davis's influential 1963 recording on the album Quiet Nights with Victor Feldman, Ron Carter, and Frank Butler. Davis radically reinterpreted the composition by replacing the original duple meter with a slow three-quarter time feel and reharmonizing the crucial seventh bar as a major seventh chord, fundamentally transforming the tune's character. Chick Corea also became closely associated with the piece, performing it as early as 1968 in a trio setting while working as accompanist for Sarah Vaughan at the Riviera Hotel in Las Vegas. The tune's flexible harmonic structure has proven receptive to such varied reinterpretations, sustaining its modest but durable presence in the jazz canon.