
Copy and paste this code in you functions.php file in you active theme. Please follow the template structure so that it will not destroy filter form layout.
function wpcfe_date_format_callback( $default_format ){
/*
* Default format is 'yyyy-mm-dd';
*/
$default_format = 'dd-mm-yyyy';
return $default_format;
}
add_filter( 'wpcfe_date_format', 'wpcfe_date_format_callback', 10 );