Is there an established theory (rather than the one I've just made up) that assumes God's ability to manipulate time?
It seems to me that if God had a viewpoint outside the laws of physics, he could cause the big bang and accelerate time (or go to sleep), place Earth at the point in time and space he chose, sleep some more, then place Adam and Eve at a suitable point in time.
Not a theory in the scientific sense, but I'd be surprised if the idea hadn't occurred to someone before. I've speculated on similar ideas myself.
What bothers me about these hypotheses is the requirement that God must intervene quite so often. If God created a Big Bang for the express purpose of creating Adam, why would God need to keep showing up every few hundred million years to tweak things? Wouldn't an earth just show up somewhere after a few billion years after the Big Bang?
Maybe God did spare himself some wait time by either accelerating time, or simply by not watching the pot boil. I cannot think of anyway we'd ever be able to detect time having magically accelerating in the distant past. So such speculations seem unlikely to become a scientific theory.