Like Butterfly says, that's the theory. How people use it something else.

Thetters is a native speaker and doesn't agree with the above.

If we change week into something else.

It is now 7 September.

If I asked you 'What are you doing next summer?' then that should also refer to 2 summers away, correct? But it usually doesn't, because the previous summer is close enough that it would still be your point of reference.

Same thing with talking about weekends on a Monday.