system
A chat on subreddit /r/NoStupidQuestions
human
There's no actual problems with the format over DD/MM/YYYY, but the inconsistency between the two worldwide bothers people. If the DD isn't more than 12, then you have no clue which number is the MM and DD. The ambiguity is actually a problem if you're doing international business. People tend to support whichever they grew up with because it's what their brain jumps to when they see dates, and they need to take time to process it if they see the other format because they look identical.

My personal policy is "DD/MMM/YYYY", such as "10/Jan/2023". There is NO ambiguity; you know for certain which is which at all times, and if it's written "MMM/DD/YYYY" or whatever you still instantly register what they mean.
gpt
This. It’s not the formatting that’s necessarily problematic, it’s the fact that there’s no way to know if 4/7/2013 is April 7, 2013 or July 4, 2013.