diff --git a/htdocs/projet/ganttchart.inc.php b/htdocs/projet/ganttchart.inc.php
index 849e89ba16c..771cb7d99cc 100644
--- a/htdocs/projet/ganttchart.inc.php
+++ b/htdocs/projet/ganttchart.inc.php
@@ -90,7 +90,7 @@ if (g)
 	var barText = "Resource";
 	var graphFormat = "day";
 
-	g.setDateInputFormat('yyyy-mm-dd');  // Set format of input dates ('mm/dd/yyyy', 'dd/mm/yyyy', 'yyyy-mm-dd')
+	g.setDateInputFormat('mm/dd/yyyy');  // Set format of input dates ('mm/dd/yyyy', 'dd/mm/yyyy', does not work with 'yyyy-mm-dd')
 	g.setDateDisplayFormat('<?php echo $dateformat; ?>');
 	/* For JSGanttImproved g.setDateTaskDisplayFormat('<?php echo $datehourformat; ?>'); */
 	/* For JSGanttImproved g.setDayMajorDateDisplayFormat('dd mon'); */
@@ -143,8 +143,8 @@ function constructGanttLine($tarr,$task,$project_dependencies,$level=0,$project_
     $start_date = $task["task_start_date"];
     $end_date = $task["task_end_date"];
     if (!$end_date) $end_date = $start_date;
-    $start_date = dol_print_date($start_date,"%Y-%m-%d");
-    $end_date = dol_print_date($end_date,"%Y-%m-%d");
+    $start_date = dol_print_date($start_date,"%m/%d/%Y");
+    $end_date = dol_print_date($end_date,"%m/%d/%Y");
     // Resources
     $resources = $task["task_resources"];
     // Define depend (ex: "", "4,13", ...)
diff --git a/htdocs/projet/ganttview.php b/htdocs/projet/ganttview.php
index 5f1589d59dc..b5843feb0a8 100644
--- a/htdocs/projet/ganttview.php
+++ b/htdocs/projet/ganttview.php
@@ -150,8 +150,9 @@ if ($id > 0 || ! empty($ref))
 
 
 /*
- * Actions
+ * Buttons actions
  */
+
 print '<div class="tabsAction">';
 
 if ($user->rights->projet->all->creer || $user->rights->projet->creer)
@@ -205,6 +206,7 @@ if (count($tasksarray)>0)
 		$tasks[$taskcursor]['task_milestone']=0;
 		$tasks[$taskcursor]['task_percent_complete']=$val->progress;
 		//$tasks[$taskcursor]['task_name']=$task->getNomUrl(1);
+		//print dol_print_date($val->date_start).dol_print_date($val->date_end).'<br>'."\n";
 		$tasks[$taskcursor]['task_name']=$val->label;
 		$tasks[$taskcursor]['task_start_date']=$val->date_start;
 		$tasks[$taskcursor]['task_end_date']=$val->date_end;
@@ -243,7 +245,6 @@ if (count($tasksarray)>0)
 		//print "xxx".$val->id.$tasks[$taskcursor]['task_resources'];
 		$taskcursor++;
 	}
-	//var_dump($tasks);
 
 	print "\n";