diff --git a/calendar/inc/class.boalarm.inc.php b/calendar/inc/class.boalarm.inc.php
index 2397a6f428..ad4b6f42ef 100755
--- a/calendar/inc/class.boalarm.inc.php
+++ b/calendar/inc/class.boalarm.inc.php
@@ -98,7 +98,7 @@
 			);
 			$alarm['id'] = $this->so->save_alarm($cal_id,$alarm);
 			$event['alarm'][$alarm['id']] = $alarm;
-			$event['alarm'][$alarm['id']]['time'] = $alarm['time'] + $this->tz_offset;	// allows viewing alarm time in users timezone
+			$event['alarm'][$alarm['id']]['time'] = $alarm['time'] - $this->tz_offset;	// allows viewing alarm time in users timezone
 
 			return $alarm;
 		}