I call it “time” like everyone else! 😂
But I think in fullest understanding of physics long in the future, physicists will say time is not real. Same for gravity. They’re both rooted in human experience and its hard to comprehend a model without them.
All the galaxies that we observe don’t behave according to gravity, gravity is too weak to hold any galaxy together as it rotates, so people invented dark matter as a fudge to preserve the theory of gravity at galactic scale.
In our hearts we know gravity is not right, the same applies for time.
There is no universal reference for time, unlike energy which has the universal reference point of absolute zero.
Even the speed of light, which we think of as distance and time, is in reality means the photon just has a single energy level in its quantum field.
We have a Euclidian experience and all of our models are still anchored in that. It’s extremely difficult to escape because it requires tremendous abstraction.
A fish would have a lot of difficulty discovering / inventing fire. We have the same challenge trying to understand reality.
Picture below essentially shows Newtonian and Einsteinian limits. But there’s obviously more beyond this. 
