"[C]an one change one's chronotype from evening to morning?"
I used to be a night owl, but I eventually synced to my wife's morning schedule. When I had no other structure (school, work) I found that I had a 26 hour day, which would precess through a normal day over time.
Mine was about 28 hours. It was great fun, I made lots of progress with lucid dreaming when I was giving my body whatever sleep schedule it dictated, and I got to know all the great all night diners. But setting appointments was troublesome; involving projections of when the precession would next overlapping a waking period with normal business hours.
I've also found scheduling to be the biggest issue with a daily rhythm != 24hr. Mine's about 28hr as well.
Fortunately I work for a small bayesian-oriented marketing research co (15 employees, I am #6) with some very accommodating founders.
The biggest hurdle is making sure I keep the team up to date on when I plan to be at work/working from home. It's not always easy to forecast my sleep schedule.
I used to be a night owl, but I eventually synced to my wife's morning schedule. When I had no other structure (school, work) I found that I had a 26 hour day, which would precess through a normal day over time.