This drift happened to me too, mostly because the most interesting things for me were happening later in the day, I would read some engrossing book, code someth

This drift happened to me too, mostly because the most interesting things for me were happening later in the day, I would read some engrossing book, code something or watch / play. The moment I put an interesting thing to do right after I woke up (martial arts training) my internal clock started going the other way. If I don’t intentionally stay up late, my clock will drift and I would get up earlier and earlier ... its weird and fascinating at the same time.