At what point in eternity did God create the universe?

God is outside of time, so there can be no "quantification" given to answer this question. He is completely and utterly outside and independent of the universe, so the question itself is impossible to answer. The question is asking for a "time point" in a realm where there is no time. The only way to put it is this: God is eternal and He created us at the beginning of time, because time started with the universe. It's important to remember that we can never comprehend this though, because we will never be outside of time even when we die. We will always experience a procession of events. This is why talking about these things is so complicated: we are using finite minds to try to understand the infinite.