Absent any date-format-aware sort controller: YMD will group results by year, then month, then day. MDY will group results by month, then day, then year. DMY

Absent any date-format-aware sort controller: YMD will group results by year, then month, then day. MDY will group results by month, then day, then year. DMY will group results by day, then month, then year. That's why all my filenames look like: YYYY_MM_DD_filename.suffix