Well, if you're on a boat, you pretty quickly become a night person. I did my one stint and switched from an early up, early to bed physical labor type to a rise at 10:00, go to sleep at 3:00 individual, right quick.
(It served me well enough when in the Army, although the getting up early was a bit of a pain. As vehicle commander, I always took the worst stint of the guard pull every night, the horrendous (for most) 2:00 AM to 4:00 AM. Even wrapped up in a sleeping bag for warmth (at night, it got very cold in the mountains in the Central Highlands of RVN), I could stay wide awake for the full two hours.)
Since we musicians (for the most part) are providing entertainment for others, that entertainment is generally scheduled for the evening hours (when everyone else is "at leisure"). So, it behooves one (says the on-line pedant) to become an evening person toute suite.