Hey, uh, thanks for the answer... I didn't see the little curly bracket the first time I looked.

Less than 7, since he probably leaves an arbitrary amount of time for reflection and answering "What good have I done today?" while he lies in bed.

I think that would fall under "examination of the day"

The left side I think purposely doesn't have defined borders to refer to a general area. So I would actually assume that the contemplation would intermix with examination of day and sleep. It's also between 9, and 10 o' clock.

Plus, he can't possibly fall asleep at 10 o' clock sharp.