To me day-month-year will always be the European date order.

If you're a fan of digging through old letters in British antiques stores, you'll find that the "American" date format that people on the internet like to complain about was inherited from Britain (along with the imperial measurement system).

It was only after the American Revolutionary War that Britain switched to putting the day before the month. Probably during one of its many Francophilia phases that seem to come and go throughout its history.

Fun fact: you can be the change you want to see!

I fill out all paper forms and typed dates as yyyy-MM-dd wherever possible. No one has ever been confused by it. Some have even copied it.

I also give units in metric sometimes and set some of my thermometers to C to help build my intuition for what different C temps feel like.

On the other hand I'm setting up a hobby machine shop at home and trying to use metric or a metric lathe would involve too much swimming upstream so alas - it is all imperial stuff.