diff --git a/mongodb_session/mongodb_session.inc b/mongodb_session/mongodb_session.inc
index b574982..515ecea 100644
--- a/mongodb_session/mongodb_session.inc
+++ b/mongodb_session/mongodb_session.inc
@@ -230,6 +230,7 @@ function drupal_session_initialize() {
     $user = drupal_anonymous_user();
     session_id(md5(uniqid('', TRUE)));
   }
+  date_default_timezone_set(drupal_get_user_timezone());
 }
 
 /**