Opened at the Imperial Theatre on November 8, 1934. Ran 76 performances, to about January 1935. Say When is an American musical with music by Ray Henderson, lyrics by Ted Koehler, and a musical book by Jack McGowan. Directed by Bertram Harrison, the production opened on Broadway at the Imperial Theatre where it ran from November 8, 1934, through January 12, 1935 for a total of 76 performances. Wiki link