What is the standard date format as required by ISO? Is it Day/Month/Year, Month/Day/Year or Year/Month/Day?

The ISO standard date format is defined in the ISO 8601:
yyyy-mm-dd.

Also check out:

***DEAD LINK REMOVED***
and
Here are some Y2K links (http://Elsmar.com/ubb/Forum37/HTML/000014.html)

Also see ISO 8601 - Standard for date and time formats (http://Elsmar.com/Forums/showthread.php?t=124)

ISO 8601 Date Time Standard