For the last several weeks my body clock has been sending me to bed early and getting up early, way before the sun rises in fact.
My body clock is exceptionally strong and I will wake at the same time day after day, regardless of what time it is. If I want to change my body clock literally the only way is to stay up all night and day and reset it entirely.
The upside of getting up so early in the morning is I get to the office very early and get a couple of hours solid work done before anyone else comes in.
It's also really nice to look out the window and watch the day grow from pitch black to light.