My wives (I was a widower for a while) have always had owl tendencies, so I stay up later than I'd do otherwise. But I still sleep nights. Natural cadence, sleep about 11:30 to 7:30. Adjusted for spouse, 12:30 or 1 to about 8 or 8:30 now that I'm retired. Given free reign, I think my wife would stay up until 2 or 2:30. I've worked an all-night shift, midnight to 8 a.m., so I know that's not prime time for me. A family member is a well-published novelist and memoirist, and she started writing when she couldn't sleep. I think most of her work is written before 7 a.m.