Creation is the beginning of God’s Revelation of himself, in which his reality is manifested to us to even explain our very own existence.
God’s act of creation is not a historical event that happens within time, but it is instead a metaphysical reality describing the universe’s dependence on God’s eternal act of creating, which transcends time.
After all time as we know it is only introduced on the Fourth “Day” of God which we really have no mechanism for measurement in context of our understanding of time