From The Openness of God:

However, timelessness presents many difficulties from a theological standpoint. First, it is hard to form any idea of what timelessness might mean, since all of our thinking is temporally conditioned. A timeless being could not make plans and carry them out. Second, it creates problems for biblical history, which portrays God as One who projects plans, experiences the flow of temporal passage and faces the future as not completely settled. How can a timeless God be the Creator of a temporal world? Why is God described as being involved in temporal realities? Third, it seems to undermine our worship of God. Do we not praise God, not because he is beyond time and change but because he works redemptively in time and brings about salvation? Fourth, if God did not experience events as they transpire, he would not experience or know the world as it actually is. If God’s eternity were timeless, God could not be related to our temporal world. In actual fact, though, the biblical symbols do not speak of divine timelessness but of God’s faithfulness over time. Though we wither and die, God abides and is not threatened or undone by time. We need an understanding of God’s eternity that does not cancel or annihilate time but stands in a positive relation to it, which is for us not against us.