I don't sleep too well, so I usually go to be around 1 and wake up around 5 or 6.

Once a month, I'll work all Friday, until about 1.00 A.M. Go home. Go to sleep. Wake up at 3 A.M., get up, drive back to the site, load up my stock, and drive to the market where I'll sell my crops and whatnot until late afternoon.

(SPOILER)Then I do sleep all night long, which, I must add, is AWESOME!