[cxr]

> Noone would expect that

You are moving the goalposts.

> "Just localization" isn't "just". Many people have the wrong localization on their computers.

Think about this for a minute longer. Do you have an example or scenario for the use of a Web site where the author can fall into a pit of success (despite having the user's wrong localization) on all things except for dates and that would be broken by allowing* this date input method?

Even ignoring that:

What I said was that "any permutation of full year, full month name, and day of the month is unambiguous". There are a finite number of months and a finite number of localized tokens for representing those months. Do you have an example of two different locales that use the same token (or token sequence) to denote different months on the calendar?

* the word "allowing" playing a crucial role here