[_zywo]

Relativity already has the inability to distinguish between past and future states built in: https://en.wikipedia.org/wiki/Relativity_of_simultaneity

I have no idea how 2D time would work, though.

[halter73]

It's possible to distinguish between past in future states if they exist in the same light cone. It says this in the wiki you linked to

> However, if the events are causally connected, precedence order is preserved in all frames of reference.