I started using yyyy-mm-dd for everything, since that is the most text-friendly sortable date. I haven't come across yyyy-dd-mm, but I'm sure someone uses it.

ISO8601 https://xkcd.com/1179/

It's mostly "why must Americans be like this?" while leaving in virtually any other country in the world (countries with a MDY date format are a handful).

Write the month as a three letter code and your ambiguity is solved.

I'm not sure about the lack of ambiguity.... Christmas day is on 25-Dec-2022 or is it 25-Dic-2022 (German), or is it 25-Dez-2022 (Spanish) ?

At least ISO-8601 works for everyone who uses the Gregorian calendar, which is certainly not everyone, but it's a reasonable coverage.

I could, but it isn’t my format the confuses me, it’s what other people do and what vendors set computers to etc.

There must be some language pair that has some collision with that.

In greek "June" and "July" start with the same three letters

I wonder if any languages have a different starting letter for each of the 12 months. Bonus if the days of the week are also different.