diff --git a/apps/calendar/ajax/event/edit.form.php b/apps/calendar/ajax/event/edit.form.php
index 837edbbbf0..7371577dcf 100644
--- a/apps/calendar/ajax/event/edit.form.php
+++ b/apps/calendar/ajax/event/edit.form.php
@@ -21,15 +21,15 @@ $vevent = $object->VEVENT;
 $dtstart = $vevent->DTSTART;
 $dtend = OC_Calendar_Object::getDTEndFromVEvent($vevent);
 switch($dtstart->getDateType()) {
-	case Sabre_VObject_Element_DateTime::LOCALTZ:
-	case Sabre_VObject_Element_DateTime::LOCAL:
+	case Sabre_VObject_Property_DateTime::LOCALTZ:
+	case Sabre_VObject_Property_DateTime::LOCAL:
 		$startdate = $dtstart->getDateTime()->format('d-m-Y');
 		$starttime = $dtstart->getDateTime()->format('H:i');
 		$enddate = $dtend->getDateTime()->format('d-m-Y');
 		$endtime = $dtend->getDateTime()->format('H:i');
 		$allday = false;
 		break;
-	case Sabre_VObject_Element_DateTime::DATE:
+	case Sabre_VObject_Property_DateTime::DATE:
 		$startdate = $dtstart->getDateTime()->format('d-m-Y');
 		$starttime = '';
 		$dtend->getDateTime()->modify('-1 day');
diff --git a/apps/calendar/ajax/event/move.php b/apps/calendar/ajax/event/move.php
index 8150fdbaa3..37420e2a87 100644
--- a/apps/calendar/ajax/event/move.php
+++ b/apps/calendar/ajax/event/move.php
@@ -24,19 +24,19 @@ $dtstart = $vevent->DTSTART;
 $dtend = OC_Calendar_Object::getDTEndFromVEvent($vevent);
 $start_type = $dtstart->getDateType();
 $end_type = $dtend->getDateType();
-if ($allday && $start_type != Sabre_VObject_Element_DateTime::DATE){
-	$start_type = $end_type = Sabre_VObject_Element_DateTime::DATE;
+if ($allday && $start_type != Sabre_VObject_Property_DateTime::DATE){
+	$start_type = $end_type = Sabre_VObject_Property_DateTime::DATE;
 	$dtend->setDateTime($dtend->getDateTime()->modify('+1 day'), $end_type);
 }
-if (!$allday && $start_type == Sabre_VObject_Element_DateTime::DATE){
-	$start_type = $end_type = Sabre_VObject_Element_DateTime::LOCALTZ;
+if (!$allday && $start_type == Sabre_VObject_Property_DateTime::DATE){
+	$start_type = $end_type = Sabre_VObject_Property_DateTime::LOCALTZ;
 }
 $dtstart->setDateTime($dtstart->getDateTime()->add($delta), $start_type);
 $dtend->setDateTime($dtend->getDateTime()->add($delta), $end_type);
 unset($vevent->DURATION);
 
-$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Element_DateTime::UTC);
-$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Element_DateTime::UTC);
+$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Property_DateTime::UTC);
+$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Property_DateTime::UTC);
 
 $result = OC_Calendar_Object::edit($id, $vcalendar->serialize());
 $lastmodified = $vevent->__get('LAST-MODIFIED')->getDateTime();
diff --git a/apps/calendar/ajax/event/resize.php b/apps/calendar/ajax/event/resize.php
index aa2d420e77..a8d8f49ae0 100644
--- a/apps/calendar/ajax/event/resize.php
+++ b/apps/calendar/ajax/event/resize.php
@@ -24,8 +24,8 @@ $end_type = $dtend->getDateType();
 $dtend->setDateTime($dtend->getDateTime()->add($delta), $end_type);
 unset($vevent->DURATION);
 
-$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Element_DateTime::UTC);
-$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Element_DateTime::UTC);
+$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Property_DateTime::UTC);
+$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Property_DateTime::UTC);
 
 $result = OC_Calendar_Object::edit($id, $vcalendar->serialize());
 $lastmodified = $vevent->__get('LAST-MODIFIED')->getDateTime();
diff --git a/apps/calendar/ajax/events.php b/apps/calendar/ajax/events.php
index 1436f63431..6ea556a7ab 100755
--- a/apps/calendar/ajax/events.php
+++ b/apps/calendar/ajax/events.php
@@ -47,7 +47,7 @@ foreach($events as $event){
 	$dtend = OC_Calendar_Object::getDTEndFromVEvent($vevent);
 	$start_dt = $dtstart->getDateTime();
 	$end_dt = $dtend->getDateTime();
-	if ($dtstart->getDateType() == Sabre_VObject_Element_DateTime::DATE){
+	if ($dtstart->getDateType() == Sabre_VObject_Property_DateTime::DATE){
 		$return_event['allDay'] = true;
 	}else{
 		$return_event['allDay'] = false;
diff --git a/apps/calendar/lib/object.php b/apps/calendar/lib/object.php
index 230c610d35..0b2cbb3815 100644
--- a/apps/calendar/lib/object.php
+++ b/apps/calendar/lib/object.php
@@ -625,7 +625,7 @@ class OC_Calendar_Object{
 		$vevent = new OC_VObject('VEVENT');
 		$vcalendar->add($vevent);
 
-		$vevent->setDateTime('CREATED', 'now', Sabre_VObject_Element_DateTime::UTC);
+		$vevent->setDateTime('CREATED', 'now', Sabre_VObject_Property_DateTime::UTC);
 
 		$vevent->setUID();
 		return self::updateVCalendarFromRequest($request, $vcalendar);
@@ -786,24 +786,24 @@ class OC_Calendar_Object{
 		}
 
 
-		$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Element_DateTime::UTC);
-		$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Element_DateTime::UTC);
+		$vevent->setDateTime('LAST-MODIFIED', 'now', Sabre_VObject_Property_DateTime::UTC);
+		$vevent->setDateTime('DTSTAMP', 'now', Sabre_VObject_Property_DateTime::UTC);
 		$vevent->setString('SUMMARY', $title);
 
-		$dtstart = new Sabre_VObject_Element_DateTime('DTSTART');
-		$dtend = new Sabre_VObject_Element_DateTime('DTEND');
+		$dtstart = new Sabre_VObject_Property_DateTime('DTSTART');
+		$dtend = new Sabre_VObject_Property_DateTime('DTEND');
 		if($allday){
 			$start = new DateTime($from);
 			$end = new DateTime($to.' +1 day');
-			$vevent->setDateTime('DTSTART', $start, Sabre_VObject_Element_DateTime::DATE);
-			$vevent->setDateTime('DTEND', $end, Sabre_VObject_Element_DateTime::DATE);
+			$vevent->setDateTime('DTSTART', $start, Sabre_VObject_Property_DateTime::DATE);
+			$vevent->setDateTime('DTEND', $end, Sabre_VObject_Property_DateTime::DATE);
 		}else{
 			$timezone = OC_Preferences::getValue(OC_USER::getUser(), 'calendar', 'timezone', date_default_timezone_get());
 			$timezone = new DateTimeZone($timezone);
 			$start = new DateTime($from.' '.$fromtime, $timezone);
 			$end = new DateTime($to.' '.$totime, $timezone);
-			$vevent->setDateTime('DTSTART', $start, Sabre_VObject_Element_DateTime::LOCALTZ);
-			$vevent->setDateTime('DTEND', $end, Sabre_VObject_Element_DateTime::LOCALTZ);
+			$vevent->setDateTime('DTSTART', $start, Sabre_VObject_Property_DateTime::LOCALTZ);
+			$vevent->setDateTime('DTEND', $end, Sabre_VObject_Property_DateTime::LOCALTZ);
 		}
 		unset($vevent->DURATION);
 
diff --git a/apps/calendar/lib/search.php b/apps/calendar/lib/search.php
index 0016751a66..79c8dba0f4 100644
--- a/apps/calendar/lib/search.php
+++ b/apps/calendar/lib/search.php
@@ -26,7 +26,7 @@ class OC_Search_Provider_Calendar extends OC_Search_Provider{
 					$start_dt->setTimezone(new DateTimeZone($user_timezone));
 					$end_dt = $dtend->getDateTime();
 					$end_dt->setTimezone(new DateTimeZone($user_timezone));
-					if ($dtstart->getDateType() == Sabre_VObject_Element_DateTime::DATE){
+					if ($dtstart->getDateType() == Sabre_VObject_Property_DateTime::DATE){
 						$end_dt->modify('-1 sec');
 						if($start_dt->format('d.m.Y') != $end_dt->format('d.m.Y')){
 							$info = $l->t('Date') . ': ' . $start_dt->format('d.m.Y') . ' - ' . $end_dt->format('d.m.Y');
diff --git a/lib/vobject.php b/lib/vobject.php
index 2b1f6534cc..ec80e1d605 100644
--- a/lib/vobject.php
+++ b/lib/vobject.php
@@ -41,7 +41,7 @@ class OC_VObject{
 	 */
 	public static function parse($data){
 		try {
-			Sabre_VObject_Property::$classMap['LAST-MODIFIED'] = 'Sabre_VObject_Element_DateTime';
+			Sabre_VObject_Property::$classMap['LAST-MODIFIED'] = 'Sabre_VObject_Property_DateTime';
 			$vobject = Sabre_VObject_Reader::read($data);
 			if ($vobject instanceof Sabre_VObject_Component){
 				$vobject = new OC_VObject($vobject);
@@ -150,12 +150,12 @@ class OC_VObject{
 	 * @param int $dateType
 	 * @return void
 	 */
-	public function setDateTime($name, $datetime, $dateType=Sabre_VObject_Element_DateTime::LOCALTZ){
+	public function setDateTime($name, $datetime, $dateType=Sabre_VObject_Property_DateTime::LOCALTZ){
 		if ($datetime == 'now'){
 			$datetime = new DateTime();
 		}
 		if ($datetime instanceof DateTime){
-			$datetime_element = new Sabre_VObject_Element_DateTime($name);
+			$datetime_element = new Sabre_VObject_Property_DateTime($name);
 			$datetime_element->setDateTime($datetime, $dateType);
 			$this->vobject->__set($name, $datetime_element);
 		}else{