So as far as I learned it and as far it makes sense to me, the term relativity means above all, that relative to your decision about the geometry OR about universal forces, the other part of the equation is determined:
G + F = const ( = reality / observed reality)
Thus, the whole point is not that reality itself is relative, but that our description or perception of reality is relative. The reality itself is very much fixed.
So as far as I remember I´d say you are wrong with your assumption about "points in time".
One thing which comes to my mind thinking about that stuff is, that time will go slower when you´re far away from massive objects like the earth. This I never really grasped and I don´t know how this contributes to the discussion. It could be just something we have to deal with, when we abandon universal forces...but I don´t know...