diff --git a/calendar/inc/class.calendar_ajax.inc.php b/calendar/inc/class.calendar_ajax.inc.php
index 967052abf7..e996974336 100644
--- a/calendar/inc/class.calendar_ajax.inc.php
+++ b/calendar/inc/class.calendar_ajax.inc.php
@@ -34,9 +34,10 @@ class calendar_ajax {
 	 * @param string $calendarOwner the owner of the calendar the event is in
 	 * @param string $targetDateTime the datetime where the event should be moved to, format: YYYYMMDD
 	 * @param string $targetOwner the owner of the target calendar
+	 * @param string $durationT the duration to support resizable calendar event
 	 * @return string XML response if no error occurs
 	 */
-	function moveEvent($eventId,$calendarOwner,$targetDateTime,$targetOwner)
+	function moveEvent($eventId,$calendarOwner,$targetDateTime,$targetOwner,$durationT=null)
 	{
 		// we do not allow dragging into another users calendar ATM
 		if(!$calendarOwner == $targetOwner)
@@ -45,7 +46,14 @@ class calendar_ajax {
 		}
 
 		$old_event=$event=$this->calendar->read($eventId);
-		$duration=$event['end']-$event['start'];
+		if (!$durationT)
+		{
+			$duration=$event['end']-$event['start'];
+		}
+		else
+		{
+			$duration = $durationT;
+		}
 
 		$event['start'] = $this->calendar->date2ts($targetDateTime);
 		$event['end'] = $event['start']+$duration;
@@ -65,7 +73,7 @@ class calendar_ajax {
 					case 'startday':
 						if ($sameday) break;
 					default:
-						$status_reset_to_unknown = true;	
+						$status_reset_to_unknown = true;
 						$event['participants'][$uid] = calendar_so::combine_status('U',$q,$r);
 						// todo: report reset status to user
 				}
diff --git a/calendar/inc/class.calendar_uiviews.inc.php b/calendar/inc/class.calendar_uiviews.inc.php
index 0e69ec9a70..131a07e780 100644
--- a/calendar/inc/class.calendar_uiviews.inc.php
+++ b/calendar/inc/class.calendar_uiviews.inc.php
@@ -1864,8 +1864,8 @@ class calendar_uiviews extends calendar_ui
 					.'onmousemove="event.cancelBubble=true;"';
 			}
 		}
-
-		$html = $indent.'<div id="'.$draggableID.'" class="calendar_calEvent'.($is_private ? 'Private' : '').' '.$status_class.
+		$resizableHelper = $this->bo->date2string($event['start']). '|' .$this->bo->format_date($event['start'],false) . '|' . $this->cal_prefs['interval'];
+		$html = $indent.'<div id="'.$draggableID.'" data-resize="'.$resizableHelper.' " class="calendar_calEvent'.($is_private ? 'Private' : '').' '.$status_class.
 			'" style="'.$style.' border-color: '.$headerbgcolor.'; background: '.$background.'; z-index: '.$z_index.';"'.
 			$popup.' '.html::tooltip($tooltip,False,$ttip_options).
 			$dd_emulation.'>'.$prefix_icon."\n".$ie_fix.$html."\n".
diff --git a/calendar/js/app.js b/calendar/js/app.js
index 609b031c6d..7dc2bdf356 100644
--- a/calendar/js/app.js
+++ b/calendar/js/app.js
@@ -137,7 +137,23 @@ app.classes.calendar = AppJS.extend(
 				event.helper.width(jQuery("#calColumn").width());
 			},
 
-		});
+		}).resizable({
+				handles: "s",
+				start:function(ui,event){
+
+				},
+				stop:function(ui,event){
+					var resizeHelper = ui.target.getAttribute('data-resize');
+					var dataResize = resizeHelper.split("|");
+					var time = dataResize[1].split(":");
+					var dropDate = dataResize[0]+"T"+time[0]+time[1];
+
+					var drop = jQuery("div[id^='drop_"+dropDate+"']");
+					var newDuration = Math.round(this.clientHeight/drop[0].clientHeight)*  parseInt(dataResize[2]) * 60;
+					that.dropEvent(this.getAttribute('id'),dropDate,newDuration);
+				},
+
+			});;
 
 
 		//Droppable
@@ -168,7 +184,7 @@ app.classes.calendar = AppJS.extend(
 					if (dpOwner == null) dpOwner = dgOwner;
 					if (dpOwner == dgOwner )
 					{
-						that.dropEvent(event.draggable[0].id, id.target.getAttribute('id').substring(id.target.getAttribute('id').lastIndexOf("drop_")+5, id.target.getAttribute('id').lastIndexOf("_O")));
+						that.dropEvent(event.draggable[0].id, id.target.getAttribute('id').substring(id.target.getAttribute('id').lastIndexOf("drop_")+5, id.target.getAttribute('id').lastIndexOf("_O")),null);
 					}
 					else
 					{
@@ -222,9 +238,10 @@ app.classes.calendar = AppJS.extend(
 	 *
 	 * @param {string} _id dragged event id
 	 * @param {array} _date array of date,hour, and minute of dropped cell
+	 * @param {string} _duration description
 	 *
 	 */
-	dropEvent : function(_id, _date)
+	dropEvent : function(_id, _date, _duration)
 	{
 		var eventId = _id.substring(_id.lastIndexOf("drag_")+5,_id.lastIndexOf("_O"));
 		var calOwner = _id.substring(_id.lastIndexOf("_O")+2,_id.lastIndexOf("_C"));
@@ -235,7 +252,8 @@ app.classes.calendar = AppJS.extend(
 				eventId,
 				calOwner,
 				date,
-				eventOwner
+				eventOwner,
+				_duration
 			);
 	},
 	/**