[sinder22]

if you're body is used to wake up at a certain time for a while and then you change this timezone you might wake up before the timer. You're body is just used to wake up at that time and you will automaticly wake up around that time. and it also could be a sign that you're body have had enough sleep, not everyone needs 8+ hours.

This is normal for workers who example work alot and then have freetime, they wake up everyday at same time and then suddenly they have freetime and can sleep longer but the body is used to wake up at that time.