Shifting sleep patterns is impossible for many people. I have to wake up at 7am for the last 5 years or so, and it's always a torture. I have to force myself t

Shifting sleep patterns is impossible for many people. I have to wake up at 7am for the last 5 years or so, and it's always a torture. I have to force myself to go to bed at 11pm to tolerate it. When I can afford to wake up at 10am, I am bright and happy and can go to bed at 3am easily. And there is nothing particularly "normal" in waking up early.