First of all, it really doesn't matter to me at all. But, there are a couple of things I want to mention. The first is that we don't really know how long it was between 1. In the beginning God created the heavens and the earth, where the earth was without form and void and 2. When God said, "Let there be light." For all we know, it could have been billions of years.
The following are my own thoughts and not related to the Bible. Albert Einstein's "Theory of Relativity" is truly interesting. He said, and it has been scientifically proven that the faster a human travels, the slower he ages. If two twins were born, one stayed on earth and one went on a journey to the north star and back at the speed of light. The north star is about 35 light years from earth, so the journey to the north star would take 70 years. The twin would step off the rocket as a 70 year old, but his twin would have died over 1,000 years before.
Many theologians believe that those taken in the rapture, go all the way to the Third Heaven in the twinkling of an eye to be with Christ. That would be much faster than the speed of light. Think about it! If every soul that dies travels that fast to immediately be present with the Lord in Heaven, then it's possible that everyone that has ever died, even those 6,000 years ago, may only realize that one second of time has gone by, while at the same time, 6,000 years passed on the earth. To them, one second they are with Christ in Heaven, and one second later, they are with Christ standing on the Mount of Olives. Just food for thought.
I believe God can bend time anyway He wants to. My best suggestion to all is: Psalm 118:8. "It is better to trust in the Lord than to put confidence in man."