ISO 8601 date format. Not because it's from a standards body, but because it's simple, sensible, clearly defined, easy to recognize, and very effective.

Date field placement in any order other than most-significant-digits-first is not only counterintuitive, but needlessly complicated to work with. Omitting critical information like the century is ambiguous and confusing.

We don't live in isolated villages any more. Mixing and matching those problems by accepting all the world's various regional and personal date styles, especially with no reliable indication of which ones apply in any given case, leads to the hodgepodge of error-prone date madness that we have today.

The 2024-09-02 format should be taught in schools and required in official documents. Let the antiquated date styles fall into disuse outside of art and personal correspondence, like cursive writing.