diff --git a/calendar/inc/class.calendar_uiforms.inc.php b/calendar/inc/class.calendar_uiforms.inc.php
index 4e2e73e834..061f0a04f8 100644
--- a/calendar/inc/class.calendar_uiforms.inc.php
+++ b/calendar/inc/class.calendar_uiforms.inc.php
@@ -70,6 +70,16 @@ class calendar_uiforms extends calendar_ui
 	{
 		$extra_participants = $_GET['participants'] ? explode(',',$_GET['participants']) : array();
 
+		// if participant is a contact, add its link title as title
+		foreach($extra_participants as $uid)
+		{
+			if ($uid[0] == 'c')
+			{
+				$title = egw_link::title('addressbook', substr($uid, 1));
+				break;
+			}
+		}
+
 		if (isset($_GET['owner']))
 		{
 			$owner = $_GET['owner'];
@@ -175,6 +185,7 @@ class calendar_uiforms extends calendar_ui
 			'public'=> $this->cal_prefs['default_private'] ? 0 : 1,
 			'alarm' => $alarms,
 			'recur_exception' => array(),
+			'title' => $title ? $title : '',
 		);
 	}
 
@@ -394,6 +405,11 @@ class calendar_uiforms extends calendar_ui
 										$msg_permission_denied_added = true;
 									}
 								}
+								// if participant is a contact and no title yet, add its link title as title
+								if ($app == 'addressbook' && empty($event['title']))
+								{
+									$event['title'] = egw_link::title($app, substr($uid, 1));
+								}
 								break;
 							}
 							// fall-through for accounts entered as contact
@@ -994,7 +1010,7 @@ class calendar_uiforms extends calendar_ui
 			else
 			{
 				egw_framework::refresh_opener($msg, 'calendar', $content['id'], $button == 'save'?'update': 'delete');
-			}	
+			}
 			egw_framework::window_close();
 			common::egw_exit();
 		}
diff --git a/calendar/templates/default/edit.xet b/calendar/templates/default/edit.xet
index d35970a4da..842f26ff48 100644
--- a/calendar/templates/default/edit.xet
+++ b/calendar/templates/default/edit.xet
@@ -119,7 +119,7 @@
 							<menupopup class="selectRole" id="role"/>
 						</menulist>
 					</vbox>
-					<button align="center" label="Add" id="add" image="add" background_image="1"/>
+					<button align="center" label="Add" id="add" image="add" background_image="1" novalidate="1"/>
 					<description/>
 				</row>
 				<row class="th gray">