diff --git a/htdocs/core/tpl/objectline_create.tpl.php b/htdocs/core/tpl/objectline_create.tpl.php
index ba1f037370e..e1d0a8de1dd 100644
--- a/htdocs/core/tpl/objectline_create.tpl.php
+++ b/htdocs/core/tpl/objectline_create.tpl.php
@@ -393,6 +393,24 @@ if ((! empty($conf->service->enabled) || ($object->element == 'contrat')) && $da
 		echo ' '.$langs->trans('to').' ';
 		echo $form->select_date($date_end,'date_end',empty($conf->global->MAIN_USE_HOURMIN_IN_DATE_RANGE)?0:1,empty($conf->global->MAIN_USE_HOURMIN_IN_DATE_RANGE)?0:1,1,"addproduct",1,0,1);
 	}
+	print '<script type="text/javascript">';
+	if (!$date_start) {
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_START_HOUR)) {
+			print 'jQuery("#date_starthour").val("'.$conf->global->MAIN_DEFAULT_DATE_START_HOUR.'");';
+		}
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_START_MIN)) {
+			print 'jQuery("#date_startmin").val("'.$conf->global->MAIN_DEFAULT_DATE_START_MIN.'");';
+		}
+	}
+	if (!$date_end) {
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_END_HOUR)) {
+			print 'jQuery("#date_endhour").val("'.$conf->global->MAIN_DEFAULT_DATE_END_HOUR.'");';
+		}
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_END_MIN)) {
+			print 'jQuery("#date_endmin").val("'.$conf->global->MAIN_DEFAULT_DATE_END_MIN.'");';
+		}
+	}
+	print '</script>'
 	?>
 	</td>
 	</tr>
diff --git a/htdocs/core/tpl/objectline_edit.tpl.php b/htdocs/core/tpl/objectline_edit.tpl.php
index e62679f030b..155ed87724c 100644
--- a/htdocs/core/tpl/objectline_edit.tpl.php
+++ b/htdocs/core/tpl/objectline_edit.tpl.php
@@ -229,6 +229,24 @@ $coldisplay=-1; // We remove first td
 	echo $form->select_date($line->date_start,'date_start',$hourmin,$hourmin,$line->date_start?0:1,"updateligne",1,0,1);
 	echo ' '.$langs->trans('to').' ';
 	echo $form->select_date($line->date_end,'date_end',$hourmin,$hourmin,$line->date_end?0:1,"updateligne",1,0,1);
+	print '<script type="text/javascript">';
+	if (!$line->date_start) {
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_START_HOUR)) {
+			print 'jQuery("#date_starthour").val("'.$conf->global->MAIN_DEFAULT_DATE_START_HOUR.'");';
+		}
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_START_MIN)) {
+			print 'jQuery("#date_startmin").val("'.$conf->global->MAIN_DEFAULT_DATE_START_MIN.'");';
+		}
+	}
+	if (!$line->date_end) {
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_END_HOUR)) {
+			print 'jQuery("#date_endhour").val("'.$conf->global->MAIN_DEFAULT_DATE_END_HOUR.'");';
+		}
+		if (!empty($conf->global->MAIN_DEFAULT_DATE_END_MIN)) {
+			print 'jQuery("#date_endmin").val("'.$conf->global->MAIN_DEFAULT_DATE_END_MIN.'");';
+		}
+	}
+	print '</script>'
 	?>
 	</td>
 </tr>