Oh, I have no qualms with also celebrating European Pi Day (aka Pi Approximation Day).

I also celebrate the Pi Day for the rest of the world, which is November 10th (and doesn't depend on a date format, at least in the conventional sense). Although, I guess it'll be November 9th this year.

🙂🙃🙂

PS. I find both the North American and European date formats to be silly. ISO 8601 for life!