God's view of time =/= man's view of time.
Psalm 90:4 - A thousand years in your sight are like a day that has just gone by, or like a watch in the night.
You're talking about an eternal being ... and then something constructed by finite minds. It is beyond understanding.
As for resting, it had a purpose. He rested on the seventh day, and then in turn, humans spend the seventh day to give thanks to God and rest themselves. What if it was a means to an end?
Interesting stuff.
How many days was noah on the ark?
How many days did Moses wonder in the desert?
How many days was Jonah in the whale?
How many days passed between Jesus' death and his resurrection?
How come only THIS time period gets the excuse of really not meaning what it says?