Genesis begins with the phrase: "In the beginning when God created the heavens and the earth." The word "beginning" is always defined by us in relation to time. So we must conclude that God "created the heavens and the earth" at the beginning of time. For God to do this God must have been apart from time, existing outside of time.
The Gospel of John begins, "In the beginning was the Word, and the Word was with God, and the Word was God." Should we read the non-stated phrase, "who was with God apart from the beginning," into this sentence or is the God, who is the Son of God, a person of time? Was God the Son begotten of God the Father at the beginning of the beginning or apart from that event, when time did not exist?