...and then you fall asleep again, and then you wake up later on and the clock is 1-3 hours earlier than you last checked?
I've experienced this numerous times, mainly on weekends, during intervals of about 1-2 months every now and then.
During my experiences I never was late for anything besides maybe a tv show that I wanted to watch and I was too late so I'd sleep again... Then I'd wake up and watch it after a few minutes of being freaked that the clock was earlier than what I thought I saw.
It was probably just drousy delusions, but if I woke up late and realize I was late for something, is it possible to go back in time a couple hours after I go back asleep? Kind of like satisfying my subconcious disappointment?