The release date will make a LOT more sense once we have the final game in our hands. Essentially, November 10th is the 240th anniversary of the US Marines, and this fact is hugely significant to the main story, as well as the overarching theme of the game. There have already been literally dozens of clues shown in the information released so far that supports this fact. Think American Revolutionary War.

EDIT: This was discussed at length after the date was originally announced back at E3.

careful Gk that info could overload peoples cerebral cortex im sry everyone i keep telling him that not his fault for trying murder people with info.

https://www.youtube.com/watch?v=ymSEibHKOgothis is you GK lol

They can always wait until the year 2077 to release it.

The most recent clue to back up the connection with the Marine Corps was https://bethesda.net/#en/events/game/fallout-4-behind-the-score-with-inon-zur/2015/09/22/30 from the official soundtrack. Other massive clues include the historical significance of the setting, the military background of our protagonist couple, the multiple references shown in concept art, the http://i.imgur.com/ki9gQVv.jpg seen in the Museum of Freedom that was released by Bethesda on July 4th... The list goes on. The founding of the Marine Corps was highly significant in the eventual outcome of the American Revolutionary War, and this very clearly forms the foundation of the entire game.