[masklinn]

> Week numbering is absolutely foreign concept for most of the world

It’s mostly a foreign concept to Americans.

> Say, I have no idea what week 26 is. I can only suggest it’s probably somewhere in [26/4]=June

So you’re saying that a clear, unambiguous, and standardised system in widespread use is bad because you would have to learn something?

> I would not even know where to quickly look it up without googling - my calendars do not have this numbering

Get a better calendar? Most European calendars have the week number printed as a matter of course, and it should be a simple toggle in the average calendaring software (certainly is in iOS).