The "by" in "by next week"

[wafflestomp]

I've been studying the future perfect, and I've been thinking that you'd use "por" for what I'm looking for (By next week, I will have swam)

Por la semana proxima/que viene, yo habré nadado.

Por el mes proximo, habréis terminado el dibujo.

Por mañana, usted habrá leído el periodico.

Are all of those right? Or is it a different word for saying "by" tomorrow or "by" next week?

Thanks!

[Rusty]

Para la semana que viene, habré nadado.
You should use the same word for the others, as well.

[wafflestomp]

So for all of these cases, whenever you want to say like "By next year______" it's always "para"?

[Rusty]

Yep.