Date problem when adding featured product

[Ajeh]

In the:
/admin/includes/languages/english.php

Are you using:

define('DATE_FORMAT_SPIFFYCAL', 'dd/mm/yyyy');

Or are you using:

define('DATE_FORMAT_SPIFFYCAL', 'dd/MM/yyyy');  //Use only 'dd', 'MM' and 'yyyy' here in any order