I wonder if it's known how time perception works at the fundamental level.
For example, to count accurately a minute/hour, do we have to keep track of the time passed counting in our minds or observing our enviroment? In the same way we can't know how much distance we've really travelled if there is no reference frame, if we were totally isolated, would we measure time accurately?
Or we could have some internal clock which helps us to measure time. I think that one problem to test this is that things like hunger, sleep, etc. could also work as clocks, so we can't be totally isolated.
For example, Richard Feynman though that every person could count a minute with some error, but the error will always be the same.