[bigthink.com]

This idea is only based on the definition of time being a measurement. If we are measuring motion it can only be done with two points of motion. in order to arrive at the idea of time dilation we need a third point which would essentially be a center of gravity.
Then we add a third dimension to time. Time is, under its current definition, simply a measurement of relative particles in motion.

But redefine time as being simply the concept that something is persisting.
It could be just space. The next obvious question should be, "Is anything persisting?". We think there is - but is there? We can't really tell unless we can make a measurement. If nothing is moving time could be zero or it could be infinite. We have no way of knowing. Thus time became a measure of motion.

An interesting question might be, "Could the speed of light be the refresh time of the universe?".