I guess it's sort of my fault. I went to sleep at 8 pm. I ended up waking up at 4 am. I did do my daily routine of showering and other stuff. I put a load of laundry in and painted my nails clear. If I get called into work today, I'll be ready. I might go to the gym again and workout my lower body for 1.5 hrs. It's what I love to do on my days off. Most mornings I'm up between 4 am- 6 am. Do you wake up early on your days off?
I've had to get up (almost) every day at 7.30 for nearly 40 years, so my brain has evolved an alarm clock circuit that wakes me up at that time whether I need to go to work or not! Fortunately, my career - which is entirely different to the job I do in order to be able to pay bills and eat once in a while - keeps me busier on days off than when I'm at work, so it comes in handy.