Two posters in this thread so far have alleged that the young earth is Biblically literal. It isn't. As ICANT has correctly stated, Genesis 1 does not indicate how old the universe and the earth is.
Genesis 1 simply states that when they were created God did it. The determination of the 24 hour day was not established until day four when the sun and moon were created according to the literacy of the record.
BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.