Jason,
The challenges to YEC (young earth creationism) go beyond numerical days of Gen 1. See:
Is the young earth interpretation biblically sound? (Rich Deem)
There is evidence from OT that
yom with a numeric designation doesn't always indicate 24 hours:
Year
Four times in the Old Testament Yom is translated "year." In I Kings 1:1, "
David was old and stricken in years..." In 2 Chronicles 21:19, "
after the end of two years" and in the very next verse "
Thirty and two years old." Finally, in Amos 4:4, "
...and your tithes after three years." In each case, Yom represents years, not days.
Age
Eight times in the Old Testament Yom is translated "age." These range from sentences like "
stricken in age," meaning old age (Genesis 18:11 and 24:1; Joshua 23:1 and 23:2), and other times it says "
old age" (Genesis 21:2, Genesis 21:7). Genesis 47:28 refers to "
the whole age of Jacob," therefore yom here refers to an entire lifetime. In Zechariah 8:4, it says old men and women will sit in the streets of Jerusalem, "
each with cane in hand because of his age." (
source)
Therefore, we have biblical evidence that
yom with a number does not equate to a 24-hour period. 'Thirty and two years old' does not equate to 32 days of 24 hours.
Oz