I'm curious as to when settlers first started to use the month-first format, as opposed to going from short duration to large in order (a Matryoshka set type of order).
hi! fyi, you'll find lots of discussion on this topic in these posts
Why does America write the date as Month/Day/Year when most of the world writes Day/Month/Year?
How did the U.S.A. end up with the MM/DD/YYYY date format?
When did the USA originally start using the mm/dd/yyyy format and for what reason?