Purl Harbour even existed in 1941.
Pearl Harbor was attacked Dec 7,1941
"At 6:00 a.m. on 7 December, the six Japanese carriers launched a first wave of 181 planes composed of torpedo bombers, dive bombers, horizontal bombers and fighters. Even as they winged south, some elements of U.S. forces on Oahu realized there was something different about this Sunday morning."
history.navy.mil/faqs/faq66-1.htm