Skyman: "thats right,!!! in an airline you wake up at 3 am to be at 5 at the airport, at 6 or 630 u take off.
if u can not do a sim session at 0200,do another job.
usually a sim has to turn 24h a day. I know an air france pilot on the a320 who go to the sim at 0200."
absolutely true and I have done enough 0400hrs departures in my time to know what it feels like.
It is a fact of life that at 0200 - 0600ish you are not at your best unless you are an owl or possum. You are also under training and paying for the privilege rather than on-line and being paid.
Trained is one thing, training is something else and the pressures are different. If you want, they can also give you a two hour delay for flow control and lose your bags, to make it more realistic!
Regardless of what we think, JAR FCL specifies "not at anti-social hours" - but each to their own and spend your money where you wish.