Tassie_Rohan:I believe its around 6000 years - creationists follow the date set by some irish monk a few hundred years ago.
Not exactly. The various age estimates of man kind come from tracing through the lineage and time lines given in the Bible. I think that different theologians come up with slightly different numbers.
The book of Genesis certainly is not a cook book for the creation of a universe.
Gesesis 1:1 says that "In the beginning God created the heavens and the earth."
Genesis 1:2 continues "The earth was without form and void; and darkness was on the face of the deep. And the Spirit of God was hovering over the face of the waters."
It doesn't say when the heavens and the void formless earth were created nor does it give a very detailed definition of exactly what a void formless earth is. Genesis then goes on with the day by day account which starts with the creation of night and day.
I don't see a Biblical basis for an estimate of the actual age of the earth at all since the "void earth" and the heavens are given as a starting point.