 As before, it’s hard to see how talk of reference frames and appeals to the relativity of simultaneity can be helpful or even relevant. A reference frame is a system of physical devices such as measuring rods and clocks that allow an observer to fix the positions of events. It’s not clear how timeless eternity can be such a system. Nor is it clear how timeless eternity can, in addition, be (like) a time, simultaneity with which can be the outcome of measurements.