--- sites/all/modules/date/date_api/date_api.module
+++ sites/all/modules/date/date_api/date_api.module
@@ -389,7 +389,7 @@
    *   Returns the formatted date string on success or FALSE on failure.
    */
   public function format($format, $force = FALSE) {
-    return parent::format($force ? $format : date_limit_format($format, $this->granularity));
+    return @parent::format($force ? $format : date_limit_format($format, $this->granularity));
   }
 
   /**