diff --git a/calendar/inc/class.calendar_bo.inc.php b/calendar/inc/class.calendar_bo.inc.php
index 0ab9323277..20839ae549 100644
--- a/calendar/inc/class.calendar_bo.inc.php
+++ b/calendar/inc/class.calendar_bo.inc.php
@@ -899,7 +899,7 @@ class calendar_bo
 		if (!$start) $start = $event['start'];
 
 		$events = array();
-		error_log(__METHOD__ . " Horizon config: {$this->config['horizont']}");
+
 		$this->insert_all_recurrences($event,$start,$this->date2usertime($this->config['horizont']),$events);
 
 		$exceptions = array();
@@ -1115,9 +1115,6 @@ class calendar_bo
 		$event_start_ts = $this->date2ts($event['start']);
 		$event_length = $this->date2ts($event['end']) - $event_start_ts;	// we use a constant event-length, NOT a constant end-time!
 
-		error_log(__METHOD__ . ':'.__LINE__ ." Recurrence end date: " . Api\DateTime::to($event['recur_enddate'], Api\DateTime::DATABASE));
-		error_log(__METHOD__ . ':'.__LINE__ ." Event end date: " . Api\DateTime::to($event['end'], Api\DateTime::DATABASE));
-		error_log(__METHOD__ . ':'.__LINE__ ." Recurrence horizon: " . Api\DateTime::to($end, Api\DateTime::DATABASE));
 		// if $end is before recur_enddate, use it instead
 		if (!$event['recur_enddate'] || $this->date2ts($event['recur_enddate']) > $this->date2ts($end))
 		{
@@ -1128,15 +1125,11 @@ class calendar_bo
 		$event['recur_enddate'] = is_a($event['recur_enddate'],'DateTime') ?
 				$event['recur_enddate'] :
 				new Api\DateTime($event['recur_enddate'], calendar_timezones::DateTimeZone($event['tzid']));
-		error_log(__METHOD__ . ':'.__LINE__ ." Recurrence end date: " . Api\DateTime::to($event['recur_enddate'], Api\DateTime::DATABASE));
+
 		// unset exceptions, as we need to add them as recurrence too, but marked as exception
 		unset($event['recur_exception']);
 		// loop over all recurrences and insert them, if they are after $start
  		$rrule = calendar_rrule::event2rrule($event, !$event['whole_day'], Api\DateTime::$user_timezone->getName());	// true = we operate in usertime, like the rest of calendar_bo
-		$rrule->rewind();
-		error_log(__METHOD__ . ' rrule: ' . $rrule . ' current: ' . $rrule->current());
-		foreach($rrule as $time) {error_log($time);};
-		$rrule->rewind();
 		foreach($rrule as $time)
 		{
 			$time->setUser();	// $time is in timezone of event, convert it to usertime used here
diff --git a/calendar/setup/default_records.inc.php b/calendar/setup/default_records.inc.php
index 091793e542..e9c0f24349 100644
--- a/calendar/setup/default_records.inc.php
+++ b/calendar/setup/default_records.inc.php
@@ -24,6 +24,7 @@ foreach(array(
 }
 
 // Start with at a month, gets updated later
+// Without this, recurrences fail until it's set
 EGroupware\Api\Config::save_value('horizont', time()+31*24*60*60,'calendar');
 
 // import timezone data
diff --git a/calendar/tests/TimezoneTest.php b/calendar/tests/TimezoneTest.php
index 2a5de082f7..8e02c69394 100644
--- a/calendar/tests/TimezoneTest.php
+++ b/calendar/tests/TimezoneTest.php
@@ -48,7 +48,6 @@ class TimezoneTest extends \EGroupware\Api\AppTest {
 		//$this->mockTracking($this->bo, 'calendar_tracking');
 
 		$this->recur_end = new Api\DateTime(mktime(0,0,0,date('m'), date('d') + static::RECUR_DAYS, date('Y')));
-		error_log("Recurrence end date: " . $this->recur_end . " (" . new Api\DateTime() . ' + ' . static::RECUR_DAYS . ' days)');
 	}
 
 	public function tearDown()
@@ -298,7 +297,7 @@ class TimezoneTest extends \EGroupware\Api\AppTest {
 			}
 		} while ($event_index < count($tz_list));
 
-		/* one specific test */
+		/* one specific test 
 		$tz_combos = array(array(
 			'client'	=> 'Europe/Berlin',
 			'server'	=> 'Pacific/Tahiti',
@@ -317,7 +316,6 @@ class TimezoneTest extends \EGroupware\Api\AppTest {
 	 */
 	protected function makeEvent($timezones, $times, $whole_day = false)
 	{
-		error_log($this->tzString($timezones));
 		$event = array(
 			'title' => ($whole_day ? 'Whole day ' : '')."Test for " . $this->tzString($timezones),
 			'description'   => ($whole_day ? 'Whole day ' : '').'Test for test ' . $this->getName() . ' ' . $this->tzString($timezones),
@@ -331,8 +329,6 @@ class TimezoneTest extends \EGroupware\Api\AppTest {
 				$GLOBALS['egw_info']['user']['account_id'] => 'A'
 			)
 		);
-		error_log(__METHOD__ . ':'.__LINE__ ." Event end date: " . Api\DateTime::to($event['end'], Api\DateTime::DATABASE));
-		error_log(__METHOD__ . ':'.__LINE__ ." Recurrence end date: " . Api\DateTime::to($event['recur_enddate'], Api\DateTime::DATABASE));
 		return $event;
 	}