Showing the events of the Sunday morning attack, the priest at Mass (at Kaneohe, I believe) announces incorrectly that it is the 1st Sunday of Advent. Actually it was the 2nd Sunday of Advent.
Despite what is claimed in the film, the Japanese did not lose 50 planes in the attack and the second wave was not "beaten" off by the Americans. The Japanese lost just 29 planes and the second wave returned to their carriers as scheduled after completing their mission.