diff --git a/addons/account/demo/account_demo.xml b/addons/account/demo/account_demo.xml
index c1dcc3f58ed..0dff40ca19f 100644
--- a/addons/account/demo/account_demo.xml
+++ b/addons/account/demo/account_demo.xml
@@ -20,7 +20,7 @@
         
         <record id="period_1" model="account.period">
             <field eval="'01/'+time.strftime('%Y')" name="code"/>
-            <field eval="'01/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 01/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-01-01'" name="date_start"/>
@@ -29,7 +29,7 @@
         </record>
         <record id="period_2" model="account.period">
             <field eval="'02/'+time.strftime('%Y')" name="code"/>
-            <field eval="'02/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 02/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-02-01'" name="date_start"/>
@@ -39,7 +39,7 @@
         </record>
         <record id="period_3" model="account.period">
             <field eval="'03/'+time.strftime('%Y')" name="code"/>
-            <field eval="'03/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 03/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-03-01'" name="date_start"/>
@@ -48,7 +48,7 @@
         </record>
         <record id="period_4" model="account.period">
             <field eval="'04/'+time.strftime('%Y')" name="code"/>
-            <field eval="'04/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 04/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-04-01'" name="date_start"/>
@@ -57,7 +57,7 @@
         </record>
         <record id="period_5" model="account.period">
             <field eval="'05/'+time.strftime('%Y')" name="code"/>
-            <field eval="'05/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 05/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-05-01'" name="date_start"/>
@@ -66,7 +66,7 @@
         </record>
         <record id="period_6" model="account.period">
             <field eval="'06/'+time.strftime('%Y')" name="code"/>
-            <field eval="'06/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 06/'+time.strftime('%Y')" name="name"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="True" name="special"/>
             <field eval="time.strftime('%Y')+'-06-01'" name="date_start"/>
@@ -75,7 +75,7 @@
         </record>
         <record id="period_7" model="account.period">
             <field eval="'07/'+time.strftime('%Y')" name="code"/>
-            <field eval="'07/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 07/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-07-01'" name="date_start"/>
@@ -84,7 +84,7 @@
         </record>
         <record id="period_8" model="account.period">
             <field eval="'08/'+time.strftime('%Y')" name="code"/>
-            <field eval="'08/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 08/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-08-01'" name="date_start"/>
@@ -93,7 +93,7 @@
         </record>
         <record id="period_9" model="account.period">
             <field eval="'09/'+time.strftime('%Y')" name="code"/>
-            <field eval="'09/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 09/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-09-01'" name="date_start"/>
@@ -102,7 +102,7 @@
         </record>
         <record id="period_10" model="account.period">
             <field eval="'10/'+time.strftime('%Y')" name="code"/>
-            <field eval="'10/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 10/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-10-01'" name="date_start"/>
@@ -111,7 +111,7 @@
         </record>
         <record id="period_11" model="account.period">
             <field eval="'11/'+time.strftime('%Y')" name="code"/>
-            <field eval="'11/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 11/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-11-01'" name="date_start"/>
@@ -120,7 +120,7 @@
         </record>
         <record id="period_12" model="account.period">
             <field eval="'12/'+time.strftime('%Y')" name="code"/>
-            <field eval="'12/'+time.strftime('%Y')" name="name"/>
+            <field eval="'X 12/'+time.strftime('%Y')" name="name"/>
             <field eval="True" name="special"/>
             <field name="fiscalyear_id" ref="data_fiscalyear"/>
             <field eval="time.strftime('%Y')+'-12-01'" name="date_start"/>