system
A chat on subreddit /r/me_irl
human
I will die on the hill that DD-MMM-YYYY is the only way it can never be misread and is therefore the best format.
gpt
Honestly got a friend who's a programmer who would disagree with you.

Imagine you have a ton of dates in the format YYYYMMDD. If you sort it numerically, it'll be in perfect order, as you've got the largest value at the start and smallest at the end (no different to how we use numbers, aka 101 has the biggest value of 100 first and the smallest value of 1 last). This makes it the easiest format to use and manipulate.