system
A chat on subreddit /r/NoStupidQuestions
human
There are 12 possible months, 31 possible days, and as many years as we have until entropy stops time from mattering so yes, in terms of how many possible values in a set? Unless there are 20 months I've been missing.
gpt
What’s the benefit in that (even back in the day)?  I can’t think of any penalty to writing a greater number before a smaller one… at all.

The only place I can imagine that mattering is when ordering the dates, and that’s precisely where this does *not* work, because the least-significant value is in the middle.