The concept of time; as an eternal thing.

Change is the mechanism which is being observed; and change does not exist without the existence of matter. The observable universe; matter on fire; in its cyclic progression; is our basis for time.

Light; the photon of our visible spectrum; comes into existence. The photon is the matter; with its variable harmonic color expressions; due to their subtle mass variations. Because of the bow wave of the photon particles; and the star smoke; or pre-atomic dark matter dust; which is also ejected from the stars; the spin of the photons; is the motion of a static charged assembly.

Space-time has no basis in reality; there is only matter-time.

Empty space has nothing upon which to see or note a change. Only when light as a particle comes into existence does change become an observable reality. The creation of the photon particle coming into existence is a change, created. Therefore time is created by the photon particles coming into existence, ultimately instigating the assemblage of all matter which is observable as a changing progression.  

Time is being newly created; with every new photon particle. Time therefore is (endless) or forever; as long as light or photons of our visible spectrum are being ejected from the stars.