The announcements today said classes start Aug 10, but as to summer programs they announced they're considering "allow[ing] the return of a very small number of students in July, mainly those whose summer work is preparatory for the fall semester." That means football training kicking off July 6th, baby!
Completely unfounded guesses: (A) Culver still happens before the start of the school year, (B) a more reasonable travel schedule heading into the Navy game in Annapolis, (C) a home opener on the 12th against Arkansas, and (D) the Pac-12 schools go conference only, which would mean the season ends on 11/21.