diff --git a/htdocs/admin/mails_templates.php b/htdocs/admin/mails_templates.php
index 3000612514a..356f52061f6 100644
--- a/htdocs/admin/mails_templates.php
+++ b/htdocs/admin/mails_templates.php
@@ -125,17 +125,30 @@ $formmail=new FormMail($db);
 if (empty($conf->global->MAIN_EMAIL_TEMPLATES_FOR_OBJECT_LINES))
 {
     $tmp=FormMail::getAvailableSubstitKey('formemail');
-    $tmp['__(AnyTranslationKey)__']='__(AnyTranslationKey)__';
-    $helpsubstit = $langs->trans("AvailableVariables").':<br>'.implode('<br>', $tmp);
-    $helpsubstitforlines = $langs->trans("AvailableVariables").':<br>'.implode('<br>', $tmp);
+    $tmp['__(AnyTranslationKey)__']='Translation';
+    $helpsubstit = $langs->trans("AvailableVariables").':<br>';
+    $helpsubstitforlines = $langs->trans("AvailableVariables").':<br>';
+    foreach($tmp as $key => $val)
+    {
+    	$helpsubstit.=$key.' -> '.$val.'<br>';
+    	$helpsubstitforlines.=$key.' -> '.$val.'<br>';
+    }
 }
 else
 {
     $tmp=FormMail::getAvailableSubstitKey('formemailwithlines');
-    $tmp['__(AnyTranslationKey)__']='__(AnyTranslationKey)__';
-    $helpsubstit = $langs->trans("AvailableVariables").':<br>'.implode('<br>', $tmp);
+    $tmp['__(AnyTranslationKey)__']='Translation';
+    $helpsubstit = $langs->trans("AvailableVariables").':<br>';
+    $helpsubstitforlines = $langs->trans("AvailableVariables").':<br>';
+    foreach($tmp as $key => $val)
+    {
+    	$helpsubstit.=$key.' -> '.$val.'<br>';
+    }
     $tmp=FormMail::getAvailableSubstitKey('formemailforlines');
-    $helpsubstitforlines = $langs->trans("AvailableVariables").':<br>'.implode('<br>', $tmp);
+    foreach($tmp as $key => $val)
+    {
+    	$helpsubstitforlines.=$key.' -> '.$val.'<br>';
+    }
 }
 
 
diff --git a/htdocs/contrat/card.php b/htdocs/contrat/card.php
index 904bd519f76..07a620963da 100644
--- a/htdocs/contrat/card.php
+++ b/htdocs/contrat/card.php
@@ -2243,14 +2243,17 @@ else
 			$formmail->withcancel = 1;
 			// Array of substitutions
 			$formmail->setSubstitFromObject($object);
+			$dateplannedstart='';
 			$datenextexpiration='';
 			foreach($object->lines as $line)
 			{
-				if ($line->statut != 4) continue;
-				if ($line->date_fin_prevue > $datenextexpiration) $datenextexpiration = $line->date_fin_prevue;
+				if ($line->date_ouverture_prevue > $dateplannedstart) $dateplannedstart = $line->date_ouverture_prevue;
+				if ($line->statut == 4 && $line->date_fin_prevue && (! $datenextexpiration || $line->date_fin_prevue < $datenextexpiration)) $datenextexpiration = $line->date_fin_prevue;
 			}
-			$formmail->substit['__CONTRACT_NEXT_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
-			$formmail->substit['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
+			$formmail->substit['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = dol_print_date($dateplannedstart, 'dayrfc');
+			$formmail->substit['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = dol_print_date($dateplannedstart, 'standard');
+			$formmail->substit['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
+			$formmail->substit['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
 			$formmail->substit['__PERSONALIZED__']='';		// deprecated
 			$formmail->substit['__CONTACTCIVNAME__']='';
 
diff --git a/htdocs/core/actions_sendmails.inc.php b/htdocs/core/actions_sendmails.inc.php
index 144cba07779..fddd6889515 100644
--- a/htdocs/core/actions_sendmails.inc.php
+++ b/htdocs/core/actions_sendmails.inc.php
@@ -351,14 +351,17 @@ if (($action == 'send' || $action == 'relance') && ! $_POST['addfile'] && ! $_PO
 			// Add specific substitution for contracts
 			if (is_object($object) && $object->element == 'contrat' && is_array($object->lines))
 			{
+				$dateplannedstart='';
 				$datenextexpiration='';
 				foreach($object->lines as $line)
 				{
-					if ($line->statut != 4) continue;
-					if ($line->date_fin_prevue > $datenextexpiration) $datenextexpiration = $line->date_fin_prevue;
+					if ($line->date_ouverture_prevue > $dateplannedstart) $dateplannedstart = $line->date_ouverture_prevue;
+					if ($line->statut == 4 && $line->date_fin_prevue && (! $datenextexpiration || $line->date_fin_prevue < $datenextexpiration)) $datenextexpiration = $line->date_fin_prevue;
 				}
-				$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
-				$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
+				$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = dol_print_date($dateplannedstart, 'dayrfc');
+				$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = dol_print_date($dateplannedstart, 'standard');
+				$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
+				$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
 			}
 
 			$parameters=array('mode'=>'formemail');
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 2b8ab5ebf7a..aa8c74026ff 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -5244,8 +5244,10 @@ function getCommonSubstitutionArray($outputlangs, $onlykey=0, $exclude=null, $ob
     		$substitutionarray['__PROJECT_REF__'] = '__PROJECT_REF__';
     		$substitutionarray['__PROJECT_NAME__'] = '__PROJECT_REF__';
 
-	    	$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATE__'] = 'Date for next expired service';
-    		$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = 'Date and hour for next expired service';
+			$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = 'Highest date planned for a service start';
+			$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = 'Highest date and hour planned for service start';
+    		$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = 'Lowest data for planned expiration of service';
+    		$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = 'Lowest date and hour for planned expiration of service';
 
     		$substitutionarray['__ONLINE_PAYMENT_URL__'] = 'LinkToPayOnlineIfApplicable';
     		$substitutionarray['__SECUREKEYPAYMENT__'] = 'Security key (if key is not unique per record)';
@@ -5285,8 +5287,10 @@ function getCommonSubstitutionArray($outputlangs, $onlykey=0, $exclude=null, $ob
 		    	}
 	    	}
 
-    		$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATE__'] = 'TODO';
-	    	$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = 'TODO';
+    		$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = 'TODO';
+	    	$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = 'TODO';
+	    	$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = 'TODO';
+	    	$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = 'TODO';
 
 	    	$substitutionarray['__ONLINE_PAYMENT_URL__'] = 'TODO';
     	}
diff --git a/htdocs/core/tpl/card_presend.tpl.php b/htdocs/core/tpl/card_presend.tpl.php
index 5273a761d4e..af6e3699f39 100644
--- a/htdocs/core/tpl/card_presend.tpl.php
+++ b/htdocs/core/tpl/card_presend.tpl.php
@@ -144,16 +144,17 @@ if ($action == 'presend')
 	// Add specific substitution for contracts
 	if (is_object($object) && $object->element == 'contrat' && is_array($object->lines))
 	{
-		$datenextexpiration = '';
-		foreach ($object->lines as $line)
+		$dateplannedstart='';
+		$datenextexpiration='';
+		foreach($object->lines as $line)
 		{
-			if ($line->statut != 4)
-				continue;
-				if ($line->date_fin_prevue > $datenextexpiration)
-					$datenextexpiration = $line->date_fin_prevue;
+			if ($line->date_ouverture_prevue > $dateplannedstart) $dateplannedstart = $line->date_ouverture_prevue;
+			if ($line->statut == 4 && $line->date_fin_prevue && (! $datenextexpiration || $line->date_fin_prevue < $datenextexpiration)) $datenextexpiration = $line->date_fin_prevue;
 		}
-		$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
-		$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
+		$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = dol_print_date($dateplannedstart, 'dayrfc');
+		$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = dol_print_date($dateplannedstart, 'standard');
+		$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
+		$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
 	}
 
 	// Choose one contact for the __CONTACTCIVNAME__ TODO Really not reliable.
diff --git a/htdocs/core/tpl/massactions_form.tpl.php b/htdocs/core/tpl/massactions_form.tpl.php
index 00ca40daf37..7e767b7cf03 100644
--- a/htdocs/core/tpl/massactions_form.tpl.php
+++ b/htdocs/core/tpl/massactions_form.tpl.php
@@ -122,16 +122,17 @@ $substitutionarray['__CONTACTCIVNAME__'] = '';
 // Add specific substitution for contracts
 if (is_object($object) && $object->element == 'contrat' && is_array($object->lines))
 {
-	$datenextexpiration = '';
-	foreach ($object->lines as $line)
+	$dateplannedstart='';
+	$datenextexpiration='';
+	foreach($object->lines as $line)
 	{
-		if ($line->statut != 4)
-			continue;
-		if ($line->date_fin_prevue > $datenextexpiration)
-			$datenextexpiration = $line->date_fin_prevue;
+		if ($line->date_ouverture_prevue > $dateplannedstart) $dateplannedstart = $line->date_ouverture_prevue;
+		if ($line->statut == 4 && $line->date_fin_prevue && (! $datenextexpiration || $line->date_fin_prevue < $datenextexpiration)) $datenextexpiration = $line->date_fin_prevue;
 	}
-	$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
-	$substitutionarray['__CONTRACT_NEXT_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
+	$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATE__'] = dol_print_date($dateplannedstart, 'dayrfc');
+	$substitutionarray['__CONTRACT_HIGHEST_PLANNED_START_DATETIME__'] = dol_print_date($dateplannedstart, 'standard');
+	$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATE__'] = dol_print_date($datenextexpiration, 'dayrfc');
+	$substitutionarray['__CONTRACT_LOWEST_EXPIRATION_DATETIME__'] = dol_print_date($datenextexpiration, 'standard');
 }
 
 $parameters = array(