Form submission handler for system_date_format_localize_form().
function system_date_format_localize_form_submit($form, &$form_state) {
$langcode = $form_state['values']['langcode'];
$formats = system_get_date_formats();
foreach ($formats as $date_format_id => $format_info) {
if (isset($form_state['values']['date_format_' . $date_format_id])) {
$format = $form_state['values']['date_format_' . $date_format_id];
system_date_format_localize_form_save($langcode, $date_format_id, $formats[$format]['pattern']);
}
}
drupal_set_message(t('Configuration saved.'));
$form_state['redirect'] = 'admin/config/regional/date-time/locale';
}