So the oranges finally got him. Near miss outside that produce store, back in late '45 / early '46, with the poster for the January 11 Madison Square Gardens fight between Jake LaMotta and Tommy Bell looking on. But nine years later, those homicidal fruits were still waiting for him. (Or was it the pesticide? Was the grandkid in on the hit?)
The bigger question: when was the old guy born? The tombstone says April 29, so that's got to count for something. But back in 1941, according to The Grandfather Part II, his sons were celebrating his birthday on December 7. "What do ya think of the nerve of them Japs? Them slanty-eyed bastards, huh? Droppin' bombs on our own backyard on Pop's birthday here?"
I don't think Francis Ford Coppola was the kind of director to get too bogged down with dates. If you track these things, it seems that Sonny's toll-booth incident should be happening in 1948, maybe 1949. But he's listening to a ballgame on the radio: Bobby Thomson's Shot Heard Round The World, which occurred October 3, 1951. I figure they wanted a ballgame to play, that particular bit of audio was readily available (the radio call was released as a record, and sold a huge number of copies), so they used it.