(at about 1h 2m) When Uncle Nito is explaining the time difference between Italy and where they are, he concludes that 3:00 in the morning where they are translates to 9:00 at night in Italy. That's an 18-hour time difference, which would be inaccurate between anywhere in the U.S. and Italy, which is six hours ahead of NYC and nine hours ahead of Los Angeles.
This story is supposedly set in the 1920s, yet the fashions and hairdos are strictly from 1951.