That One Says It
As you may have guessed, the way that various countries write dates may cause minor confusion. You probably put the month first without thinking at times if you’re American.
This time, though, the fields were labeled. Someone was able to make it all the way to a Reddit thread enraged about the bug before someone alerted them to the fact that the date fields were clearly designated. However, it would be infuriating if they didn’t allow for a genuine date.