You may remember back on KEN P.D. SNYDECAST #160: Scratch Fever Dana expressed his desire to follow in Benny's footsteps when it comes to mentioning his age.
Jack Benny famously always said he was 39 years old no matter how old he was. Here's a great clip of Jack Benny receiving a "singing telegram" on his birthday.
And here is a FULL episode of The Jack Benny Show from 1947 entitled "Jack's Birthday Party":