diff --git a/src/CalendarExport.php b/src/CalendarExport.php
index 5c9dde6..923579e 100755
--- a/src/CalendarExport.php
+++ b/src/CalendarExport.php
@@ -140,11 +140,11 @@ public function getStream()
             {
                 $dtStart = $event->isAllDay() ?
                     $this->formatter->getFormattedDate($event->getStart()) : 
-                    $this->formatter->getFormattedDateTime($event->getStart());
+                    $this->formatter->getFormattedUTCDateTime($event->getStart());
 
                 $dtEnd   = $event->isAllDay() ?
                     $this->formatter->getFormattedDate($event->getEnd()) :
-                    $this->formatter->getFormattedDateTime($event->getEnd());
+                    $this->formatter->getFormattedUTCDateTime($event->getEnd());
 
                 $this->stream->addItem('BEGIN:VEVENT')
                     ->addItem('UID:'.$event->getUid())