Am a night owl, always have been. School was awful, bc. of early hours. Now able to sleep as needed-don't have a schedule at all. Sunrise makes me sleepy, but nighttime can be darkly unsettling. So I don't sleep any regular hours-on average, over the span of a month, I follow a 25-hour clock. I go to sleep and wake up 1 hour later than the previous day/night. It can be very random-seeming & unpredictable, on a day-to-day basis. In general, I get sleepy 18 hours after I woke up, though it's difficult to fall asleep even when I'm tired. Sleep whenever I can manage it, bc. I feel restless & worried & uncomfortable intentionally attempting to go to sleep.
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*"I don't know what it is, but I know what it isn't."*