This component substitutes the ugly the select boxes for the date component with a readonly textfield in which to visualize the date selected by tha calendar. The date, before visualization will be submitted by ajax request to Drupal, and formatted according your configurations set in (admin/config/regional/settings) and according to the current site language(admin/config/regional/date-time/locale).
To use a specific format on a date component you can set the following classes in the "Wrapper CSS classes" under the Display fieldset:
date_format_long=== Longdate_format_medium=== Mediumdate_format_short=== Short(default)