If there is no beginning to time, it follows that there is no beginning to relative rates of change...it is a possibility.
Is it possible for a real infinity to be completed?
It may already be complete in the form Eternalism;
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Eternalism is a philosophical approach to the ontological nature of time, which takes the view that all points in time are equally real, as opposed to the presentist idea that only the present is real, and the growing block universe theory of time in which past and present are real while the future is not.''
(Phys.org) —''The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity. The model may also account for dark matter and dark energy, resolving multiple problems at once.
The widely accepted age of the universe, as estimated by general relativity, is 13.8 billion years. In the beginning, everything in existence is thought to have occupied a single infinitely dense point, or singularity. Only after this point began to expand in a "Big Bang" did the universe officially begin.
Although the Big Bang singularity arises directly and unavoidably from the mathematics of general relativity, some scientists see it as problematic because the math can explain only what happened immediately after—not at or before—the singularity.
"The Big Bang singularity is the most serious problem of general relativity because the laws of physics appear to break down there," Ahmed Farag Ali at Benha University and the Zewail City of Science and Technology, both in Egypt, told Phys.org.''