Kathy's Waltz was composed by Dave Brubeck for the 1959 album Time Out, recorded by the Dave Brubeck Quartet for Columbia Records. The tune was inspired by Brubeck watching his young daughter Catherine dance playfully around a room, and its title preserves a misspelling of her name introduced by Columbia Records on the original pressing. The composition opens in 4/4 time, evoking the child's jumping steps, before shifting into waltz time and then layering both meters simultaneously, creating a distinctive polyrhythmic texture that sets it apart from conventional jazz waltzes. This metrical superimposition pairs thematically with the preceding track Three to Get Ready, which alternates between triple and quadruple meter rather than combining them. The rhythmic experimentation reflects Brubeck's broader creative interests during this period, shaped in part by exposure to non-Western meters encountered during a State Department-sponsored tour of Eurasia. While not as widely recognized as Take Five or Blue Rondo a la Turk, the tune remains a valued part of the Time Out repertoire, an album that earned gold certification in 1963 and eventually went double platinum. The original recording on Time Out, featuring Paul Desmond on alto saxophone and Brubeck on piano, stands as the definitive version, with the tune rarely covered independently outside of Brubeck-related performances.