Eodem modo Time is not like space
``Space is like time, but time is not like space''
JRL in A Treatise on Time and Space
Two arguments from Special Theory of Relativity
(i) Minkowski spacetime
(ii) Einstein's frame-dependence of the present
Minkowski spacetime is alleged to have abolished the difference between time and space.
But although it integrates time with space, it retains a fundamental distinction between timelike and spacelike separations.
The Lorentz signature is -+++, not ++++.
So far as electromagnetism is concerned there is no preferred frame of reference, and so no absolute, world-wide present.
(Rather like there being no absolute rest in Newtonian mechanics.)
But if we widen physics to include cosmology or quantum mechanics, there are preferred frames.