Then how come adjusments based exclusively on Einstein's theory are necessary to make GPS work? How come atom bombs, developed based on Einsten's theory, work? You don't know what you are talking about.
With the very existence of God as a premise, my perspective on physics has always been that it's a disciplined science that has evolved over centuries - dedicated to the ongoing understanding and characterization of the basic rules & laws set in place by God to govern the fundamental properties and interactions of matter and energy in His universe. Advanced modern science us just an ongoing attempt by God's most intelligent creations on this planet at understanding a tiny fraction of one corner of the mind of God and what he has created for us.
Aside from conjectures per modern theoretical physics on even more general governing theories beyond Einstein's General & Special Theories of Relativity, they are still the accepted governing theories on physics, applied on a daily basis to many real-world scientific & engineering problems (definitely NOT "debunked" as claimed in this thread).
If one were inclined to apply modern theoretical physics to the old/new earth theological debate, as understood by humans in our current time reference, circlecity and LikeARock, who is being tongue in cheek about "human years" vs. "God years," are absolutely in the right ballpark IMHO.
From relativity, the concept of time dilation - whether due to relative velocity or distance from a common/relative gravitational body (Earth - who knows how far "Heaven" is from Earth?), can absolutely explain the difference between a "day" as viewed/measured by an observer on the face of the Earth, vs. a "day" as viewed/measured by God. IF God (in Heaven) were moving at a velocity relative to Earth that was very near the speed of light, OR IF God (in Heaven) was extremely distant from the gravitational body represented by the Earth, then the relative differences in time could very well be quite extreme - per our modern understanding of space-time & the theories governing it.
In short, a "day" from God's perspective could, according to modern theoretical physics, very well equate to billions of years from the perspective of an observer on Earth. Einstein's theories - which are nothing more than humanity's current collective scientific understanding of God's rules governing space-time - actually explain everything. Moreover, how could the language of ancient Hebrew and the people of that time even begin to describe such concepts in the vocabulary and human understanding of that time? IMHO, the writers of the age did their best at translating the word of God into the language and understanding of the age they lived in.