--- a/includes/date_api_argument_handler.inc.orig	2009-10-01 20:25:11.000000000 -0400
+++ b/includes/date_api_argument_handler.inc	2009-10-01 20:21:18.000000000 -0400
@@ -189,7 +189,8 @@ class date_api_argument_handler extends 
    * Provide a link to the next level of the view from the argument.
    */
   function title() {
-    $format = $this->date_handler->views_formats($this->options['granularity'], 'display');
+    $granularity = $this->date_handler->arg_granularity($this->argument);
+    $format = $this->date_handler->views_formats($granularity, 'display');
     $range = $this->date_handler->arg_range($this->argument);
     return date_format_date($range[0], 'custom', $format);
   }