I cannot agree more with this article on defining “Days” in Genesis 1.
Many individuals interpret the word “day” in Genesis 1 to mean a broad period of time. This is called Evolutionary Theology, which concludes that science is correct in the idea that the world is millions of years old and that Scripture needs to be reconciled to this belief.
Pastor Dave Jenkins points out that the problem is not in the exegetical definition of the Hebrew word, “Yom”, but in the attempt by others to synchronize the passage of Genesis 1 with the modern views of science.
Good article. Well worth reading.