Present and future... there are three dimensions in material reality: height, width, depth = 3D. The fourth dimension is time. The fourth dimension is applied to physical reality, just the same as the first three. 4D = height, width, depth, time.
That's also why when it would make sense that eternity means "outside time." It would make sense that if one believes in God and that God is eternal, there would be no beginning and no end to God...BECAUSE GOD IS NOT MATERIAL, and thus the four dimensions that apply to material reality -height, width, breadth, and time- would not apply to God.