Time is simply blocks or slices of reality, added on top of one another. Writes C. D. Broad’s in his theory of time in 1923:
[…] such a theory as this accepts the reality of the present and the past, but holds that the future is simply nothing at all. Nothing has happened to the present by becoming past except that fresh slices of existence have been added to the total history of the world […] The sum total of existence is always increasing, and it is this which gives the time-series a sense [direction] as well as an order.
C. D. Broad, Scientific Thought: A Philosophical Analysis of some of its fundamental concepts