:100644 100644 f188292... 0000000... M	sites/all/modules/date/date/date_elements.inc

diff --git a/sites/all/modules/date/date/date_elements.inc b/sites/all/modules/date/date/date_elements.inc
index f188292..5b6fc19 100644
--- a/sites/all/modules/date/date/date_elements.inc
+++ b/sites/all/modules/date/date/date_elements.inc
@@ -519,6 +519,7 @@ function date_combo_validate($element, &$form_state) {
         $errors[] = t('The To date is invalid.');
       }
       if (empty($errors)) {
+        if ($to_date_empty) $item[$to_field] = null;
         form_set_value($element, $item, $form_state);
       }
     }