A reminder to non-Americans: assigning Pi Day to 22nd July is not only more accurate than 3.14 (22/7 is 3.14285), it's also more likely to annoy Americans.
@jameswallis if Canada and the US can have different Thanksgivings, we can have a US and European pi day. But I won’t concede dd/mm is better than mm/dd, because both are inferior to #ISO8601.