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Actually, in a universal sense, there's no such thing as time except as a method of measuring distances. Time as we frame it is merely a convenience.

Well by that standard there's no such thing as space except as a method of measuring distances. There's no such thing as matter except as a way of measuring mass and no such thing as mass except as a way of measuring energy.

There is time, there is space.

They form a single 4 dimensional fabric of "spacetime" and within this spacetime is this stuff we call mass/energy.

We move through time at the speed of causality, i.e. the speed of light. When we move through space we trade motion through time for motion through space and vice versa. This is the cause of time dilation as we approach the speed of light. It can be thought of as a type of inertial effect, like when you round a corner fast in a car.

You can think of time as being a negative curvature, that no matter which direction you turn, the only way to go is down. As long as you have mass. But if you are massless, then you are not effected by time at all. The entire universe would be a single instant.

Here's a fun video that sort of helps things click.