It’s always struck me as curious that this day is codified as 9-11.

It’s true that we say September (9) 11th(11), but whenever you distill a date down to numbers on a form, the little boxes always ask for day-month-year in that order. Not month-day-year. Think of your birthday.

I always assumed the logic to be that it starts with the smallest increment – day – and then follows with the next smallest – month – and finishes with year, the largest.

That would mean 9-11 is the 9th of November.

I can see that 9-11 rolls off the tongue. It sounds like 911 the number you call in an emergency.

But what is the technical reason? Is it always written as month-day-year in the US? Or was this an exception to the rule of numeric dating systems?