What are they like?

How would they look like? 

Would they be something like fences or lines drawn in a box?

Perhaps it's something like a late Sunday morning, or may be an incoming schedule. 

Some might think they are like the burn out or the man in his mid life crisis. The mother of three with bags under her eyes. The student driven to their last drop of energy as Finals approach. The young woman reading until 5 in the morning to finish homework. The director of an organization partaking of late nights. A cry on a cross.

Or may be they look more like a week. Perhaps limits bear a resemblance to the waning minutes of the sixth day, and the soon beginning of a seventh day.