Why do we lose track of time when we sleep?

Question

Is every living thing experiencing it the same as humans?

In: 4

Answer 1

I lose track when I’m inside my room which has neither a clock nor windows to allow sunlight so, I don’t think sleeping is the determining factor here

Answer 2

time doesnt exist, we created it, hence why your body doesnt know about it without some external items to remind you constantly.