I'm in US, I've shifted to trading at night, it suits me well, catch the Asia and Europe markets. Since forever, it's easier to stay up later than to wake up at the same time in the morning; waking up earlier, headache, fog, nausea, end-of-the-world feeling, it's like a hangover even though no drinking the night before. Forget Halloween -- Daylight Savings Day in Spring (move clock forward 1 hour) is the day of horror for me.
I try to wake up at noon but unfortunately it's creeping towards 12:30 now. Morning activity, then I'm ready for the day by 3:30 pm, still 1 and half hours of normal business time to take care of stuff like doctor's appt's, customer service, bank, etc; they usually leave messages at 10:00 am or so; if I'm lucky everything can be done through email or the website so no need to actually go somewhere or talk to someone.
I don't miss social life. I used to do such years ago, but one day honestly realized I did not enjoy it very much. I only hung out with friends because society programs one to think that's what you're supposed to do. Everybody has their own level in this regard, but very few have the insight or introspection to figure out what their individual level is.
I'm fully awake and hit peak productivity by midnight, then, try to go to bed by 2:00 am, but it's creeping towards 2:30 - 3:00 now. I wish I had more then 2 hours of "full-on mood" and didn't have to try to sleep immediately afterwards. I think I would be well suited to a deep space mission, where there is no day-night difference, or I could reprogram the clocks.