Full Idea
Cosmologists have a concept of objective simultaneity, which they take to mean something like 'temporally equidistant from the Big Bang'.
Gist of Idea
Simultaneity can be temporal equidistance from the Big Bang
Source
Brian Ellis (The Metaphysics of Scientific Realism [2009], 6)
Book Reference
Ellis,Brian: 'The Metaphysics of Scientific Realism' [Acument 2009], p.124
A Reaction
I find this very appealing, when faced with all the relativity theory that tells me there is no such thing as global simultaneity, a claim which I find deeply counterintuitive, but seems to have the science on its side. Bravo.