Yeah, I wasn't quite sure about the order, so I went with what I thought would be "more common to less common" - ISO first, then US m/d/y, then the one eht16 had set up as preferred back in the day (German style with dots), then the remaining three; but it's true that that order doesn't make any damn sense.
Maybe one of ``` yyyy-mm-dd yyyy-mm-dd dd/mm/yyyy dd.mm.yyyy mm/dd/yyyy mm.dd.yyyy yyyy/mm/dd yyyy/mm/dd dd.mm.yyyy dd/mm/yyyy mm.dd.yyyy mm/dd/yyyy ``` works best - probably the right one, so that it's "YMD, DMY, MDY with non-slash separators, and then the same with slash separators".