There is no time before creation. There is only eternity, and time can make no intrusion into eternity, no creature can by its existence or nonexistence add something or take away something from eternity. Already Augustine said very accurately, “Without doubt the world did not come into existence in time, but with time” (De Civitate Dei [The City of God], 10.6).

Geerhardus Vos, Reformed Dogmatics, 223.