Hmm, I would not say that a change in state = time, but that a state changes at some point in time where the state is current for the period of time (start to e

Hmm, I would not say that a change in state = time, but that a state changes at some point in time where the state is current for the period of time (start to end) in which some measurable attribute of an object does not change. The standard for measuring time is based on planetary movement etc, so its really all about observing change as it happens, and the sequence of those changes. If the universe was devoid of matter, it would mean there would be no us. And since time is a human concept, that concept would not exist :)