diff --git a/addons/mrp/report/mrp_report.py b/addons/mrp/report/mrp_report.py
index d677184586e..68487527966 100644
--- a/addons/mrp/report/mrp_report.py
+++ b/addons/mrp/report/mrp_report.py
@@ -39,7 +39,7 @@ class report_workcenter_load(osv.osv):
             create or replace view report_workcenter_load as (
                 SELECT
                     min(wl.id) as id,
-                    to_char(p.date_planned,'YYYY:IW') as name,
+                    to_char(p.date_planned,'YYYY:mm:dd') as name,
                     SUM(wl.hour) AS hour,
                     SUM(wl.cycle) AS cycle,
                     wl.workcenter_id as workcenter_id
@@ -49,7 +49,7 @@ class report_workcenter_load(osv.osv):
                         ON p.id = wl.production_id
                 GROUP BY
                     wl.workcenter_id,
-                    to_char(p.date_planned,'YYYY:IW')
+                    to_char(p.date_planned,'YYYY:mm:dd')
             )""")
 
 report_workcenter_load()
diff --git a/addons/mrp/report/mrp_report_view.xml b/addons/mrp/report/mrp_report_view.xml
index db628eb5431..aee3578a632 100644
--- a/addons/mrp/report/mrp_report_view.xml
+++ b/addons/mrp/report/mrp_report_view.xml
@@ -22,7 +22,7 @@
             <field name="type">graph</field>
             <field name="arch" type="xml">
                 <graph string="Work Center load" type="bar">
-                    <field group="True" name="name"/>
+                    <field name="name"/>
                     <field name="cycle" operator="+"/>
                     <field name="hour" operator="+"/>
                     <field group="True" name="workcenter_id"/>