diff --git a/htdocs/core/lib/project.lib.php b/htdocs/core/lib/project.lib.php
index 7838a3597d1c8..9316c2bcf68c3 100644
--- a/htdocs/core/lib/project.lib.php
+++ b/htdocs/core/lib/project.lib.php
@@ -342,12 +342,12 @@ function projectLinesa(&$inc, $parent, &$lines, &$level, $var, $showproject, &$t
 
 				// Date start
 				print '<td align="center">';
-				print dol_print_date($lines[$i]->date_start,'day');
+				print dol_print_date($lines[$i]->date_start,'dayhour');
 				print '</td>';
 
 				// Date end
 				print '<td align="center">';
-				print dol_print_date($lines[$i]->date_end,'day');
+				print dol_print_date($lines[$i]->date_end,'dayhour');
 				print '</td>';
 
 				// Planned Workload (in working hours)
@@ -500,12 +500,12 @@ function projectLinesb(&$inc, $parent, $lines, &$level, &$projectsrole, &$tasksr
 
 			// Date start
 			print '<td align="center">';
-			print dol_print_date($lines[$i]->date_start,'day');
+			print dol_print_date($lines[$i]->date_start,'dayhour');
 			print '</td>';
 
 			// Date end
 			print '<td align="center">';
-			print dol_print_date($lines[$i]->date_end,'day');
+			print dol_print_date($lines[$i]->date_end,'dayhour');
 			print '</td>';
 
 			// Planned Workload
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index db473165d5421..33520901f168f 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -83,8 +83,8 @@
 {
 	$error=0;
 
-	$date_start = dol_mktime(0,0,0,$_POST['dateomonth'],$_POST['dateoday'],$_POST['dateoyear']);
-	$date_end = dol_mktime(0,0,0,$_POST['dateemonth'],$_POST['dateeday'],$_POST['dateeyear']);
+	$date_start = dol_mktime($_POST['dateohour'],$_POST['dateomin'],0,$_POST['dateomonth'],$_POST['dateoday'],$_POST['dateoyeassskr'],'user');
+	$date_end = dol_mktime($_POST['dateehour'],$_POST['dateemin'],0,$_POST['dateemonth'],$_POST['dateeday'],$_POST['dateeyear'],'user');
 
 	if (empty($_POST["cancel"]))
 	{
@@ -232,12 +232,12 @@
 
 	// Date start
 	print '<tr><td>'.$langs->trans("DateStart").'</td><td>';
-	print dol_print_date($object->date_start,'day');
+	print dol_print_date($object->date_start,'dayhour');
 	print '</td></tr>';
 
 	// Date end
 	print '<tr><td>'.$langs->trans("DateEnd").'</td><td>';
-	print dol_print_date($object->date_end,'day');
+	print dol_print_date($object->date_end,'dayhour');
 	print '</td></tr>';
 
 	// Other options
@@ -302,12 +302,12 @@
 
 	// Date start
 	print '<tr><td>'.$langs->trans("DateStart").'</td><td>';
-	print $form->select_date(($date_start?$date_start:''),'dateo',0,0,0,'',1,1);
+	print $form->select_date(($date_start?$date_start:''),'dateo',1,1,0,'',1,1);
 	print '</td></tr>';
 
 	// Date end
 	print '<tr><td>'.$langs->trans("DateEnd").'</td><td>';
-	print $form->select_date(($date_end?$date_end:-1),'datee',0,0,0,'',1,1);
+	print $form->select_date(($date_end?$date_end:-1),'datee',1,1,0,'',1,1);
 	print '</td></tr>';
 
 	// planned workload
diff --git a/htdocs/projet/tasks/task.php b/htdocs/projet/tasks/task.php
index 5e16715445c47..1dc4edf7ee8fa 100644
--- a/htdocs/projet/tasks/task.php
+++ b/htdocs/projet/tasks/task.php
@@ -83,8 +83,8 @@
 		$object->description = $_POST['description'];
 		$object->fk_task_parent = $task_parent;
 		$object->planned_workload = $planned_workload;
-		$object->date_start = dol_mktime(0,0,0,$_POST['dateomonth'],$_POST['dateoday'],$_POST['dateoyear']);
-		$object->date_end = dol_mktime(0,0,0,$_POST['dateemonth'],$_POST['dateeday'],$_POST['dateeyear']);
+		$object->date_start = dol_mktime($_POST['dateohour'],$_POST['dateomin'],0,$_POST['dateomonth'],$_POST['dateoday'],$_POST['dateoyear'],'user');
+		$object->date_end = dol_mktime($_POST['dateehour'],$_POST['dateemin'],0,$_POST['dateemonth'],$_POST['dateeday'],$_POST['dateeyear'],'user');
 		$object->progress = $_POST['progress'];
 
 		// Fill array 'array_options' with data from add form
@@ -322,12 +322,12 @@
 
 			// Date start
 			print '<tr><td>'.$langs->trans("DateStart").'</td><td>';
-			print $form->select_date($object->date_start,'dateo');
+			print $form->select_date($object->date_start,'dateo',1,1);
 			print '</td></tr>';
 
 			// Date end
 			print '<tr><td>'.$langs->trans("DateEnd").'</td><td>';
-			print $form->select_date($object->date_end?$object->date_end:-1,'datee');
+			print $form->select_date($object->date_end?$object->date_end:-1,'datee',1,1);
 			print '</td></tr>';
 
 			// Planned workload
@@ -411,12 +411,12 @@
 
 			// Date start
 			print '<tr><td>'.$langs->trans("DateStart").'</td><td colspan="3">';
-			print dol_print_date($object->date_start,'day');
+			print dol_print_date($object->date_start,'dayhour');
 			print '</td></tr>';
 
 			// Date end
 			print '<tr><td>'.$langs->trans("DateEnd").'</td><td colspan="3">';
-			print dol_print_date($object->date_end,'day');
+			print dol_print_date($object->date_end,'dayhour');
 			print '</td></tr>';
 
 			// Planned workload