diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index e51409ef81b..8bcf9250bd4 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -2090,7 +2090,7 @@ class ExtraFields
 						// values provided as a date pair (start date + end date), each date being broken down as year, month, day, etc.
 						$value_key = array(
 							'start' => dol_mktime(GETPOST($dateparamname_start . 'hour', 'int'), GETPOST($dateparamname_start . 'min', 'int'), GETPOST($dateparamname_start . 'sec', 'int'), GETPOST($dateparamname_start . 'month', 'int'), GETPOST($dateparamname_start . 'day', 'int'), GETPOST($dateparamname_start . 'year', 'int'), 'tzuserrel'),
-							'end' => dol_mktime(GETPOST($dateparamname_end . 'hour', 'int'), GETPOST($dateparamname_start . 'min', 'int'), GETPOST($dateparamname_start . 'sec', 'int'), GETPOST($dateparamname_end . 'month', 'int'), GETPOST($dateparamname_end . 'day', 'int'), GETPOST($dateparamname_end . 'year', 'int'), 'tzuserrel')
+							'end' => dol_mktime(GETPOST($dateparamname_end . 'hour', 'int') !='-1' ? GETPOST($dateparamname_end . 'hour', 'int') : '23', GETPOST($dateparamname_end . 'min', 'int') !='-1' ? GETPOST($dateparamname_end . 'min', 'int') : '59', GETPOST($dateparamname_end . 'sec', 'int') !='-1' ? GETPOST($dateparamname_end . 'sec', 'int') : '59', GETPOST($dateparamname_end . 'month', 'int'), GETPOST($dateparamname_end . 'day', 'int'), GETPOST($dateparamname_end . 'year', 'int'), 'tzuserrel')
 						);
 					} elseif (GETPOSTISSET($keysuffix."options_".$key.$keyprefix."year")) {
 						// Clean parameters