In my times of anxiety and depression, I would be awake until 5:30am every day. It was the magic hour where suddenly I'd feel it was "safe" to go to sleep, and I would be able to do so easily at that time. Obviously I was not working. It was just the most comfortable time for some reason. Like nothing bad could happen if I waited until then to sleep? I was like that all my life. I hope you can turn your sleep hours around @PintoBean . Maybe it will just happen at some point.