diff --git a/calendar/inc/class.calendar_timezones.inc.php b/calendar/inc/class.calendar_timezones.inc.php
index dea4693e9b..b60309762d 100644
--- a/calendar/inc/class.calendar_timezones.inc.php
+++ b/calendar/inc/class.calendar_timezones.inc.php
@@ -7,7 +7,7 @@
  * @link http://www.egroupware.org
  * @package calendar
  * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
- * @copyright (c) 2009-11 by RalfBecker-At-outdoor-training.de
+ * @copyright (c) 2009-15 by RalfBecker-At-outdoor-training.de
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  * @version $Id$
  */
@@ -154,6 +154,13 @@ class calendar_timezones
 		return !$data ? $data : ($what ? $data[$what] : $data);
 	}
 
+	/**
+	 * Import messages from init_static, if import happend in that request
+	 *
+	 * @var string
+	 */
+	protected static $import_msg;
+
 	/**
 	 * Init static variables for session and check for updated timezone information
 	 *
@@ -184,6 +191,8 @@ class calendar_timezones
 			$alias_msg = self::import_tz_aliases($updated);
 			if ($updated) error_log($alias_msg);	// log that timezone aliases have been updated
 
+			self::$import_msg = $msg.'<br/>'.$alias_msg;
+
 			egw_cache::setSession(__CLASS__, 'tzs_checked', true);
 		}
 	}
@@ -323,10 +332,12 @@ class calendar_timezones
 		{
 			throw new egw_exception_no_permission_admin();
 		}
-		$output = '<h3>'.self::import_zones()."</h3>\n";
-		$output .= '<h3>'.self::import_tz_aliases()."</h3>\n";
-
-		$GLOBALS['egw']->framework->render($output, lang('Update timezones'), true);
+		if (empty(self::$import_msg))
+		{
+			self::$import_msg = self::import_zones();
+			self::$import_msg .= '<br/>'.self::import_tz_aliases();
+		}
+		$GLOBALS['egw']->framework->render('<h3>'.self::$import_msg.'</h3>', lang('Update timezones'), false);
 	}
 
 	/**