Been up since 4:30 here. That is pretty typical. Sometimes it is 3:30, 2:30, once when I went to bed early it was midnight. This morning one of my cats woke me up. They are on a diet and with my weird sleeping patterns, he is used to having breakfast by then, and he was hungry! But often I wake them up.
When I wake up early like that, I know from past experience that I may as well get up and sew, get on the computer, do housework or something, as I can't get back to sleep for at least four hours anyway. Thankfully, I'm retired now, so can take a long nap later in the day. It was no fun when I was working and had this problem perpetually.
Truth is, I was born on the wrong planet. One with twelve hour days would fit my body clock much better. Four hours sleep, eight hours up. Yep, that would work out just perfect.