diff --git a/contract/README.rst b/contract/README.rst
index f946d8ba5..6b24bfa07 100644
--- a/contract/README.rst
+++ b/contract/README.rst
@@ -60,8 +60,8 @@ Usage
    * the recurrence parameters: interval (days, weeks, months, months last day or years),
      start date, date of next invoice (automatically computed, can be modified) and end date (optional)
    * auto-price, for having a price automatically obtained from the price list
-   * #START# or #END# in the description field to display the start/end date of
-     the invoiced period in the invoice line description
+   * #START# - #END# or #INVOICEMONTHNAME# in the description field to display
+     the start/end date or the start month of the invoiced period in the invoice line description
    * pre-paid (invoice at period start) or post-paid (invoice at start of next period)
 
 #. The "Generate Recurring Invoices from Contracts" cron runs daily to generate the invoices.
diff --git a/contract/static/description/index.html b/contract/static/description/index.html
index bac600a2e..f978fd1ea 100644
--- a/contract/static/description/index.html
+++ b/contract/static/description/index.html
@@ -407,8 +407,8 @@ user access rights.</p>
 <li>the recurrence parameters: interval (days, weeks, months, months last day or years),
 start date, date of next invoice (automatically computed, can be modified) and end date (optional)</li>
 <li>auto-price, for having a price automatically obtained from the price list</li>
-<li>#START# or #END# in the description field to display the start/end date of
-the invoiced period in the invoice line description</li>
+<li>#START# - #END# or #INVOICEMONTHNAME# in the description field to display
+the start/end date or the start month of the invoiced period in the invoice line description</li>
 <li>pre-paid (invoice at period start) or post-paid (invoice at start of next period)</li>
 </ul>
 </li>