Description: This thesis critically examines Paul Helm's defense of God's timeless existence, rooted in the classical medieval view, within the broader framework of divine immutability. By analyzing the doctrines of incarnation and creation, it explores whether Helm and other eternalists are justified in asserting that God is atemporal. The central inquiry focuses on the compatibility of divine timelessness with the concept of strong immutability, arguing that while Helm's account of divine eternity is coherent, it relies on an untenable doctrine of strong immutability. The thesis further contends that it is possible for Christian theism to maintain God's immutability without necessitating absolute mutability or immutability in all respects.