I have a lot of thoughts on Time, But I've found that one flaw I have is, I possess a lot of confidence and zero shame or patience, Sometimes I assume people will want my input before I even stop to consider that maybe they don't.
So, I apologize if this was addressed to someone specifically, I didn't mean to butt in. Time has a lot of definitions, What happened yesterday is gone and what will happen tomorrow seems yet to transpire.
To be honest, I've done a lot of speculation on time, I believe Someday, Time will be considered a fundamental force closely tied in with Gravity and electromagnetism. This is an important realization because of the way Spacetime curves around objects of mass.
I believe Time as we perceive it is simply limited by our own ability to perceive it. As Thomas suggests, I believe all of time from beginning to end is a "finished whole" That is to say, Time, Past present and future is like a Quantum system. It's all there, It's all in play at all times, But we "experience" it in a very limited way, I believe Time could be spherical or at the very least "Not Flat, Because I believe the only thing that prevents us from experiencing the past present and future all at once, is a simple gravitational horizon.
This Horizon prevents us from experiencing the past and the future all at once, And so we progress through time Frame by frame. But, Time does possess a different meaning for how the word is used,
What time is it? Not this Time. Time and time again. We need our social measurements and perceptions of time for our daily lives, But what we call time isn't what time truly is, This curvature of time, Creates this horizon that forces us to experience time in the way we do.
But that's just my take on the issue. but, We don't fully understand Gravity, Not really, To be truthful and in the same turn, We don't fully understand time.