At the end of the movie in the flashback, they talk about the Japanese attack on Pearl Harbor happening "on Pop's birthday". The Pearl Harbor attacks were on December 7, but according to his tombstone, in The Godfather
, Vito's date of birth is April 29. See more
The godfather was born Vito Andolini, in the town of Corleone in Sicily. In 1901 his father was murdered for an insult to the local Mafia chieftain. His older brother Paolo swore revenge and disappeared into the hills, leaving Vito, the only male heir, to stand with his mother at the funeral. He was nine years old.
[gunshots and screams
[subtitled from Italian
They've killed the boy! They've killed young Paolo! They've killed your son Paolo!