Gravity is the force that in a way “generates” time. Time and space are intertwined by gravity. Humans are taught to view time as a passage, a river, a flow; requiring one be here and then there. Or humans view it as a location mechanism, as though finding a coordinate on a graph.

Time is neither of those things, our lives are marked only by our experiences as decaying energy, perceptive to the combined forces within the universe.

My best answer is that perception is the force pushing us through time. Gravity, as a wave, is the force that binds certainty of position, to certainty of velocity(speed & direction), we can only absolutely certain of one of those two: a change in gravity can change the space in between the two points speed is measured over or it will mutate the velocity one is traveling.

Our relative perception of time is marked by how we decay during the journey between two points