I just bothered with that. Also, I'm actually the most active at 10 PM and I do have some posts that were made during 1 AM. I am baffled that I have not ever posted during 8 AM, though, but whatever.
9pm apparently, makes the most sense really. Also somewhat surprisingly, I have more posts at midnight than I do at 6am, 9 am or 1pm, that seems weird.