commit 8638b87b05451f9130f7d4500bb97127167de97f
Author: Joel Pittet <joel@pittet.ca>
Date:   Fri Jun 21 09:49:39 2013 -0600

    fix required

diff --git a/core/modules/datetime/datetime.module b/core/modules/datetime/datetime.module
index c8a4270..c4fbe52 100644
--- a/core/modules/datetime/datetime.module
+++ b/core/modules/datetime/datetime.module
@@ -377,6 +377,7 @@ function template_preprocess_datetime_wrapper(&$variables) {
   $element = $variables['element'];
 
   // If the element is required, a required marker is appended to the label.
+  $variables['required'] = NULL;
   if(!empty($element['#required'])) {
     $variables['required'] = array(
       '#theme' => 'form_required_marker',