All that this means is it's high time we abandoned our datetime's in favour of spacetime's.

  from spacetime import spacetime, spacetimedelta
  then_and_there = spacetime.here_and_now() + spacetimedelta(years=1, x=5, y=3, z=-2)

Now all we need a detailed time-dependant gravity model of the universe to account for relativistic effects, and some what to throw in quantum scale stuff and we've solved.... everything.

(edit: formatting is hard)