Obvious enough, but here goes: God must be outside time, Lord of time, to be within all time. If he was within time as creatures are within time, He could not be present at all times.
As John Frame likes to say, our theology should be done in “because of” mode rather than “in spite of.” God is responsively within time not in spite of the fact that He is unbound by time, but because He is unbound by time.