How about this : Time is a continuous process of change of matter, ie, the time is a concept that serves us so we can concentrate in a continuous motion, in relation to past, present and future events, provided that it is present, the reference point.
Time does not flow in all systems, for all observers, just as fast (experimentally verified fact,as stated above), so that indeed there is some sort of "flow" of time.
Things change. It is a fact. And it is this change, we call the stream of time.
Let me provide a modified analogy from the book of Brian Greene, "The fabric of the universe", and the fact that the basis of OTR's is a wonderful feature.
Imagine that you are now, at this moment, sitting in a comfy chair and read, for example, Kant's "Critique of Pure Reason."
At the same time I also sit on the other side of the galaxy, staring into space and not thinking about anything.
If there was some miracle telescope and you and I could see each other,noted that it is, in the same period of time.
And we would agree that now is right now.
At one point I get up from a chair, sit in a space vehicle and start to drive/drift/whatever, away from you, in certain speed,in order to purchase a sports betting ticket, on the match between (insert football teams here).
Depending on the speed of my suspension, from you,my present would become your past, or vice versa, you'd be there in my future.
For me it was a reality and the moment that you have long passed that correlated with my current present.
And vice versa.
If the sportsbook was in your direction and I'd moved to you, and not from you.
Then it would be my present, coincided with your future.
It implicitly suggests that the past, present and future constitute one whole and that every moment of the whole forever and ever, exist.