> It's the US short form, matching the word-month order we always use for regular dates: "August 7, 2025".

Counterexample: US Independence Day is called the “Fourth of July”.

I would agree that, for dates with named months, the US mostly writes “August 8, 2025” and says “August eighth, 2025” (or sometimes “August eight, 2025”, I think?), and other countries mostly write “8 August 2025” and say “the eighth of August, 2025”; but neither is absolute.

Not really a counterexample, that's a holiday, not a regular date.