[TrianguloY]

If we follow the same logic. If today is may 2026, and you want to do something "next September", are you referring to september 2027? After all, months are also grouped in years.

The fact that "next [X]day" skips the one on the current week is arbitrary, and probably more confusing than if it didn't. If people you are talking to understands that, go on, but otherwise keep in mind that "next [X]day" is confusing and you should clarify or say it differently