... instantly gives a meaning and thus a value to time

... can be assumed from that but let’s just go with that...

And I’m sure that ...

I'm not a philosopher, but even I can see from this paragraph you're a bit of a twat.

Nihilism is based on belief. The skepticism that questions humanity's morality and values that go unquestioned in most other beliefs. It basically dictates that you consider that everything, including life, is ultimately meaninglessness and that any value you see in it is not atttributed by default, but by you.

You want to discuss that idea with some light relativity theory and entropy nonsense ? You are so missing the point.