diff --git a/htdocs/commande/class/api_orders.class.php b/htdocs/commande/class/api_orders.class.php
index 289bbea2c7e..ab0abb3d151 100644
--- a/htdocs/commande/class/api_orders.class.php
+++ b/htdocs/commande/class/api_orders.class.php
@@ -33,7 +33,8 @@ class Orders extends DolibarrApi
      * @var array   $FIELDS     Mandatory fields, checked when create and update object
      */
     static $FIELDS = array(
-        'socid'
+        'socid',
+    	'date'
     );
 
     /**
@@ -233,7 +234,9 @@ class Orders extends DolibarrApi
     }
 
     /**
-     * Create order object
+     * Create a sale order
+     *
+     * Exemple: { "socid": 2, "date": 1595196000, "type": 0, "lines": [{ "fk_product": 2, "qty": 1 }] }
      *
      * @param   array   $request_data   Request data
      * @return  int     ID of order