You are assuming that 'time' has always existed. Ever hear of the "big bang". That is when God created 'time'. God indeed is eternal but eternity is a concept that man can not imagine since we exist in time and not outside of it.
Read on ahead of that part of my previous comment: If the Big Bang is when God “created” Time, then how is it possible for God to cause the change in the circumstances where it transitions from one without Time into one with it? If God’s realm is “timeless” then both these phases of reality are simultaneous because Time is the only demarcating entity of change and Time “doesn’t exist” until it is created.
By the way, recent discoveries in astronomy point to what is known as the Flat Universe, and this is one that allows a Cyclic Model to be feasible. Dark Matter and Dark Energy are other phenomena supporting such a model. So, there is no substantiating proof that Time “began” with the Big Bang - as if a prior Universe didn’t exist before it.