I mean, from the CJK languages: they begin with family name then end it with the legal first name while that’s reverse in let’s say English, Spanish, Russian where the first name starts then ends with the family name. As in, 近藤浩治 becomes Koji Kondo in ENG when it’s actually read as “Kondo Koji” upon referring back to its mother tongue (other languages that follow a similar format are: Mandarin, Korean or Hungarian for example).


But, US style is month-day. If you just leave out the year, which shouldn’t be a problem for anyone who isn’t a time traveler or just woke up from a coma, you’re using US format.
The problem is when the day is 12 or less. What’s 7/8? 7th of August or 8th of July?