it most importantly sorts properly when used at the front of a filename, and it's surprisingly easy to read; and in context I'm mostly looking at the month-date which can be picked off the end, "march 11" which is how we say dates in English anyway
time of day can be appended without messing with the collation (usually i put a space)
I think every time this topic comes up I come across someone with this misconception - usually from a country that celebrates the 4th of July.
But at the same time, "Fourth of July" should not be used to infer anything about how Americans say dates. It doesn't help prove that both orders are used for dates.
In the real world, some people say day-month and some say month-day, and the holiday is called "Fourth of July". In a counterfactual world where everyone switched to month-day, the holiday would still be called "Fourth of July". So you can't use "Fourth of July" to demonstrate what people actually use for dates.
Once upon a time yes.
So that makes it sort of a reason to think those are still possible, but equally validly it acts as a reason to say nobody does that anymore.
So overall it's entirely reasonable to ignore such ambivalent evidence/"evidence".