Full Idea
The global wavefront that collapses when a light signal from the Big Bang is observed is what most plausibly defines the frontier between past and future.
Gist of Idea
The present is the collapse of the light wavefront 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.127
A Reaction
I'm not sure I understand this, but it is clearly worth passing on. Of all the deep mysteries, the 'present' time may be the deepest.