Well, if we really want to get into inconsistencies on that date: Vito's birthdate, accoding to his tombstone in GF, was April 29, 1887. How'd it get moved to Dec. 7 in the flashback scene? Probably so FFC and Puzo could write a comic line for Fredo: "Japs didn't know it was Pop's birthday."
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.