As of writing, plugins/libcalendaring/libcalendaring.php of Winterfell contains the following calendar_date_format_sets by default:
```
'calendar_date_format_sets' => array(
'yyyy-MM-dd' => array('MMM d yyyy', 'M-d', 'ddd MM-dd'),
'dd-MM-yyyy' => array('d MMM yyyy', 'd-M', 'ddd dd-MM'),
'yyyy/MM/dd' => array('MMM d yyyy', 'M/d', 'ddd MM/dd'),
'MM/dd/yyyy' => array('MMM d yyyy', 'M/d', 'ddd MM/dd'),
'dd/MM/yyyy' => array('d MMM yyyy', 'd/M', 'ddd dd/MM'),
'dd.MM.yyyy' => array('dd. MMM yyyy', 'd.M', 'ddd dd.MM.'),
'd.M.yyyy' => array('d. MMM yyyy', 'd.M', 'ddd d.MM.'),
),
```
However, "d.M" leads to "14.8" while it should be "14.8." because it's the 14. day of the 8. month (in German-speaking countries for example, where the "dot" as date separator is even standardized, you speak like this, e.g. "Vierzehnter Achter"). Thus I suggest the following minor change:
```
'dd.MM.yyyy' => array('dd. MMM yyyy', 'd.M.', 'ddd dd.MM.'),
'd.M.yyyy' => array('d. MMM yyyy', 'd.M.', 'ddd d.MM.'),
```