In my time there were several different days...here's a few in no particular order:
1) Fly your ass off days back at the squadron. 2 or 3 day a week fly rate. Unfortunately, that usually meant you were FCF'ing. Which...could suck the life out of you depending on which card, or more importantly, which crew you were part of.
2) Fly your ass off at sea. 4 days a week...Most Epic day of my career: woke up at some ungodly hour and launched right at the ass crack of dawn as the carrier was pulling up next to us. Logged...LOGGED...11.6 hours of VERTREP that day. Amazing day.
3) Fly your ass off at a training command at least 5 days a week...at least...we were flying weekends a lot for cross country flights but here's the run down: a highly sophisticated form of torture in which you watch an endless supply of kids wearing white helmets make the same mistakes in the same order in the same manner. Then you fix them with the same solution...repeat...endlessly. BUT, you're flyin!
With the exception of being between deployments at my first squadron, every fly day was 8-12 hour days depending on the event. I do remember I did three check rides in 1.5 hours once which made for a 5 hour day. Time flys when you're not downing studs. When were at home guard, if you weren't flying, outta the office by 3 pm.
Sprinkle in there: eat lightning, crap thunder, golf, get hammered with the best fuckin' people on the planet, go to SERE, study, study,study some more...in fact that never stops..., look cool, be cool, fly to Air Shows sign auto graphs and take pictures (even we helo guys got a little hero worship now and then) with every shape of human you can imagine, kiss babies, get kissed. CLosest thing you'll ever be to a super hero: A military Pilot at an Air Show on a Military Base. Preferably and Air Force base as they have better golf courses and hotter women.
This one time on cruise, we went a week without a flight...I slept in my rack for 28 hours straight (piss breaks of course and my buds got me some mid rats). I had to get up because my back was about to go out due to excessive rack ops.
Those were the days!