Day One:
I will assume the last time Naruto slept was on the boat before it arrived at Turtle Island. Everything that happened -- from trying to ask Killer Bee's help taming the Ninetails and then defeating his hate at the Falls of Truth before going inside the temple and confronting the Ninetails -- happened in one day. Naruto began his trek to the battlefield that day and ran with Killer Bee through the night.
Day Two:
Naruto collides with "Tobi" in the morning. Naruto's clones help the army clear the different fronts of Zetsu clones. Madara-zombie resurrects, finishes and arrives at the Naruto-Obito confrontation after dusk.
Day Two-Night: Ten-tails, Shinobi Alliance, etc.
Day Three: Dawn, the fight is over everybody says goodbye. Naruto's birthday, Sasuke and Naruto fight through the day and then sleep through the night after being wounded and paralyzed.
Day Four: They wake up and Sasuke stops being a douche.