What we call a day is when The Earth revolves once and it appears that the sun has risen and set. But that's just a matter of perception. God did not create the sun until the fourth "day". So, whatever a "day" was before than can only be known to and understood by God.
But feel free to enlighten me if the case is otherwise. It's been only in the last three years or so that most of what I have been taught in church and by my fellow Christians about God in the previous 35 years or was wrong. If I am wrong about this, please set me straight.
you pretty much nailed it as I see it. time and space for that matter is a construct of god. God is outside of “time” so to speak.