The following is from a conversation I had with a Catholic friend I like and admire:
You made a passing comment about the lack of uniform belief in a literal week about 6,000 years ago through church history, and of course I cannot deny this. But then, no church had a doctrine of transubstantiation for the first thousand years of church history, and most today still do not.
One must build a case for what the Bible does and does not teach by the Bible, not by popular vote.
As AiG answers this better than I could, I shall just do a little cut and paste action here to explain why this is not an argument against my position, but rather, the history behind this question is a case against the OEC position.

From AiG:
Is Genesis non-committal on the age of the earth, as Sproul and many other scholars today say? If so, why is it that throughout church history most of the church fathers came to a conclusion on how old the earth was? As early as 181 AD Theophilus of Antioch wrote, “All the years from the creation of the world [to Theophilus’s day] amount to a total of 5,698 years . . . .” Continue reading

Why even bring up Genesis 1 if not to show that they are following a divine example? Surely even these people, without the benefit of i-phones and a public school education, could count to seven, or understand the idea of taking a day off? In other sections of the OT when God refers to a six to one ratio, such as working the land for six YEARS and then letting it rest for one YEAR, He does not bring up the creation week. If it was merely a metaphor meant to illustrate a six to one/ work to rest, then why only bring it up when He is talking about DAYS but never other lengths of time? 





