Ask HN: What is your sleep cycle?

Ask HN: What is your sleep cycle?
8 by duch | 5 comments on Hacker News.
My sleep cycle is fucked (3-8AM) and I spend most of my time in the office (10AM-6PM) half asleep. Every couple of days, come home early to get a couple of hours of sleep in the evening. I find myself very productive in the night, after 11 PM (reading/programming), but I'm now resolved to change my sleep cycle to an optimal one. I was wondering what your sleep cycle is, and how do you maintain it over time. It would be great if you can answer, - What is your typical sleep cycle? How many hours of sleep do you need to feel fresh in the morning? - Is it different over the weekend? Do you find it difficult to switch back to "normal" cycle on Mondays? - Do you think your sleep cycle is optimal for you? If you can change it, what would it be? - Are you productive at night or are you a morning person? - Your best productive hours?