When's Your Birthday?
- Blwyddyn: 1937
- Gwlad: United States of America
- Genre: Comedy
- Stiwdio: RKO Radio Pictures
- Allweddair: horoscope, astrology
- Cyfarwyddwr: Harry Beaumont
- Cast: Joe E. Brown, Marian Marsh, Fred Keating, Edgar Kennedy, Maude Eburne, Suzanne Kaaren