Can God go back in time?

Answer 1

Of course He can. God is not subject to nature - nature is subject to God. For an example of God making time reverse see Isaiah 38:7. One of the many reasons that people come to erroneous conclusions concerning creation, God's abilities, and God's word is that we are "naturally" minded and see things from a naturalistic viewpoint. Nature itself is not natural; It couldn't have come about by natural means anymore than chocolate cake can come about without the involvement of people. Imagine how long random chance would take to create chocolate cake - it wouldn't happen. So why do people believe that something as complex, and sophisticated as the variety of life that we are a part of, can happen by accident? Because they are so naturally minded that they can't see the forest for the trees; or in this case can't see God because they can't see past the creation. God can and does interject himself into "our" natural world anytime He decides to. Lord help us to forget about our own ego and agenda long enough to embrace the infinite genius and love that comes only from You!

Answer 2

God (as usually understood in Christian theology) is eternal and exists outside time; he created time and so existed before time (which is a bit hard to understand). He therefor does not experience the flow of time as we do, instead he experiences all time simultaneously from beginning to end. Without the flow of time, there is no "go back" or "go forward" in time.

For other religions view of their god(s) and time, I am unable to comment.