In two places in the bible (Psalm 90:4 & 2 peter 3:8) it says that to God a thousand years is like a day, and a day is like a thousand years. When the bible is talking about time, we need to know who's perspective that time is. Also be mindful how often the bible reminds man that we were formed from dust.
but with that being said, it is by no means a requirement for salvation to believe one way or the other.
in conclusion a day isnt a day consitantly in man's standards either. Even we know today that our "day" isn't the the universal day for all existance. If one of us stood on saturn a day would not be 24 hours, but instead would be 10 hours 40 minutes at least that's what textbooks say, i've never been there .
I agree with imyourobgyn on on thing, i dont think that God has a huge preference when the Redskins play the Cowboys.