[Steve_Seattle]

I would think that our bodies have some sense of time; not clock time, but cycles of time involving hunger, thirst, activity, and sleep.

About 15 years ago, I was involved in an accident and had a concussion. I was able to answer all of the medics questions except the ones about time, which reinforced for me that clock time and calendar time are somewhat artificial.

[the OlLine Rebel]

Circadian rhythm.

According to child sleep expert Dr. Ferber, our natural cycle is closer to 25 hours, not 24.

So we get offset after a while.