It's normal in Asia.

I'm not in Asia though.

It's also normal to speak Chinese in China. That doesn't mean that I should be speaking Chinese as well.

> "Normal" people never use YYYY-MM-DD format.

My point was that this isn't true.

And Sweden. And probably lots of other countries too. It's a world standard, and there are very few places that use hyphens in dates that are not ISO dates.