Examples of date field format specifications

This specification... ...matches this date on the invoice
YYYYMMDD 2009-05-08
DDMMYYYY 05-08-2009
DDMMYY 08-05-09
DMY 8-5-9, 08-05-09, or 8-5-09
DDMMMYYYY 24-Oct-2009
DX[.]MMMMYYYY 7. May 2009