Day Dream is a jazz ballad composed primarily by Billy Strayhorn in 1940, with shared credits going to Duke Ellington and lyricist John Latouche under the publishing conventions of the era. Strayhorn wrote the piece at Ellington's New York home while the Ellington Orchestra was touring Europe, crafting the melody specifically for alto saxophonist Johnny Hodges, whose sensuous, gliding tone became inseparable from the composition. The tune was first recorded in 1941 by a small group led by Hodges with Strayhorn himself at the piano. Its lush, flowing melody unfolds over deceptively complex harmonic progressions that distinguish it within the standard ballad repertoire, creating an intimate, dreamlike atmosphere that rewards close listening. The harmony is rich with chromatic movement and non-standard chord changes that reflect Strayhorn's sophisticated ear, resisting easy categorization while remaining deeply expressive. Day Dream holds a respected place in the jazz standard canon, though it is somewhat overshadowed by Strayhorn's more famous works such as Take the A Train, Lush Life, and Chelsea Bridge. Notable recordings include Hodges's original 1941 session, Ella Fitzgerald's version on her 1957 Duke Ellington Song Book with a new Strayhorn arrangement, Strayhorn's own solo piano performance on The Peaceful Side in 1961, and the Hodges feature on Ellington's Grammy-winning tribute album And His Mother Called Him Bill.