I wonder if any other date on the calendar boasts a trio of birthday's with the combined stature in American music of Bing Crosby, Pete Seeger & James Brown. It's also the birthday of Niccolo Macchiavelli, but pretty much no Hollywood notable beyond Bing.
(actually IMDb has Bing Crosby's birthday as yesterday, but Allmusic has it as today. Mike did you always think you shared your day with Bing? Who's wrong?)