There are 6 days of Creation and a day of rest.
In 2 Peter 3:8 a single day is like a thousand years with
the Lord. The context is the Second Coming.
We have 6000 years since Creation and a Millinneal Kingdom.
In Luke 3 we have Mary's geneology back to Adam. See my
13 Aug 2009 post for my research spreadsheet. The years
since Adam are about 6,000.
If you allow more than 6,000 years since Creation, then
you do not take the Bible literally.