The Real Nature of the Concept of Time

What we call "time" is in fact a method by which we compare one moment to another. For example, when a person taps an object, he hears a particular sound. If he taps the same object again, he hears another sound. Believing that there is an interval between the two sounds, he calls this interval "time." Yet when he hears the second
noise, the first one he heard is no more than an imagination in his mind, merely a bit of information in his memory. Aperson formulates his perception of time by comparing the "present" moment with what he holds in memory. If he doesn't make this comparison, he can have no perception of time either.
Renowned physicist Julian Barbour defines time in this way: Time is nothing but a measure of the changing positions of objects. A pendulum swings, the hands on a clock advance. Briefly, time comes about as a result of comparisons of data
stored in the brain. If man had no memory, his brain could not make such interpretations and therefore, he would never form any perceptions of time. One determines himself to be thirty years old, only because he has accumulated information pertaining to those thirty years. If his memory did not exist, then he could not think of any such preceding period and would experience only the single "moment" in which he was living.

from:www.harunyahya.com