diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index 932fa998d0a..dc7ebf3ca95 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -19,6 +19,7 @@
 #
 ##############################################################################
 
+import calendar
 from datetime import date, datetime
 from dateutil import relativedelta
 
@@ -117,9 +118,9 @@ class crm_case_section(osv.osv):
         """
         month_begin = date.today().replace(day=1)
         section_result = [{
-                            'value': 0,
-                            'tooltip': (month_begin + relativedelta.relativedelta(months=-i)).strftime('%B'),
-                            } for i in range(self._period_number - 1, -1, -1)]
+                          'value': 0,
+                          'tooltip': (month_begin + relativedelta.relativedelta(months=-i)).strftime('%B'),
+                          } for i in range(self._period_number - 1, -1, -1)]
         group_obj = obj.read_group(cr, uid, domain, read_fields, groupby_field, context=context)
         for group in group_obj:
             group_begin_date = datetime.strptime(group['__domain'][0][2], tools.DEFAULT_SERVER_DATE_FORMAT)
@@ -135,12 +136,14 @@ class crm_case_section(osv.osv):
         obj = self.pool.get('crm.lead')
         res = dict.fromkeys(ids, False)
         month_begin = date.today().replace(day=1)
-        groupby_begin = (month_begin + relativedelta.relativedelta(months=-4)).strftime(tools.DEFAULT_SERVER_DATE_FORMAT)
+        date_begin = month_begin - relativedelta.relativedelta(months=self._period_number - 1)
+        date_end = month_begin.replace(day=calendar.monthrange(month_begin.year, month_begin.month)[1])
+        date_domain = [('create_date', '>=', date_begin.strftime(tools.DEFAULT_SERVER_DATE_FORMAT)), ('create_date', '<=', date_end.strftime(tools.DEFAULT_SERVER_DATE_FORMAT))]
         for id in ids:
             res[id] = dict()
-            lead_domain = [('type', '=', 'lead'), ('section_id', '=', id), ('create_date', '>=', groupby_begin)]
+            lead_domain = date_domain + [('type', '=', 'lead'), ('section_id', '=', id)]
             res[id]['monthly_open_leads'] = self.__get_bar_values(cr, uid, obj, lead_domain, ['create_date'], 'create_date_count', 'create_date', context=context)
-            opp_domain = [('type', '=', 'opportunity'), ('section_id', '=', id), ('create_date', '>=', groupby_begin)]
+            opp_domain = date_domain + [('type', '=', 'opportunity'), ('section_id', '=', id)]
             res[id]['monthly_planned_revenue'] = self.__get_bar_values(cr, uid, obj, opp_domain, ['planned_revenue', 'create_date'], 'planned_revenue', 'create_date', context=context)
         return res
 
diff --git a/addons/mass_mailing/mass_mailing.py b/addons/mass_mailing/mass_mailing.py
index 49ee106bc69..4f59994d4a6 100644
--- a/addons/mass_mailing/mass_mailing.py
+++ b/addons/mass_mailing/mass_mailing.py
@@ -194,10 +194,13 @@ class MassMailing(osv.Model):
         }
         for id in ids:
             res[id] = {}
-            date_begin = self.browse(cr, uid, id, context=context).date
-            domain = [('mass_mailing_id', '=', id), ('opened', '>=', date_begin)]
+            date_begin = datetime.strptime(self.browse(cr, uid, id, context=context).date, tools.DEFAULT_SERVER_DATETIME_FORMAT)
+            date_end = date_begin + relativedelta.relativedelta(days=self._period_number - 1)
+            date_begin_str = date_begin.strftime(tools.DEFAULT_SERVER_DATETIME_FORMAT)
+            date_end_str = date_end.strftime(tools.DEFAULT_SERVER_DATETIME_FORMAT)
+            domain = [('mass_mailing_id', '=', id), ('opened', '>=', date_begin_str), ('opened', '<=', date_end_str)]
             res[id]['opened_monthly'] = self.__get_bar_values(cr, uid, id, obj, domain, ['opened'], 'opened_count', 'opened', context=context)
-            domain = [('mass_mailing_id', '=', id), ('replied', '>=', date_begin)]
+            domain = [('mass_mailing_id', '=', id), ('replied', '>=', date_begin_str), ('replied', '<=', date_end_str)]
             res[id]['replied_monthly'] = self.__get_bar_values(cr, uid, id, obj, domain, ['replied'], 'replied_count', 'replied', context=context)
         return res
 
@@ -274,7 +277,7 @@ class MassMailing(osv.Model):
     }
 
     _defaults = {
-        'date': fields.datetime.now(),
+        'date': fields.datetime.now,
     }
 
 
diff --git a/addons/sale_crm/sale_crm.py b/addons/sale_crm/sale_crm.py
index d6413c994e7..47caad79c26 100644
--- a/addons/sale_crm/sale_crm.py
+++ b/addons/sale_crm/sale_crm.py
@@ -19,6 +19,7 @@
 #
 ##############################################################################
 
+import calendar
 from datetime import date
 from dateutil import relativedelta
 
@@ -48,12 +49,13 @@ class crm_case_section(osv.osv):
         obj = self.pool.get('sale.order')
         res = dict.fromkeys(ids, False)
         month_begin = date.today().replace(day=1)
-        groupby_begin = (month_begin + relativedelta.relativedelta(months=-4)).strftime(tools.DEFAULT_SERVER_DATE_FORMAT)
+        date_begin = month_begin - relativedelta.relativedelta(months=self._period_number - 1).strftime(tools.DEFAULT_SERVER_DATE_FORMAT)
+        date_end = month_begin.replace(day=calendar.monthrange(month_begin.year, month_begin.month)[1]).strftime(tools.DEFAULT_SERVER_DATE_FORMAT)
         for id in ids:
             res[id] = dict()
-            created_domain = [('section_id', '=', id), ('state', 'in', ['draft', 'sent']), ('date_order', '>=', groupby_begin)]
+            created_domain = [('section_id', '=', id), ('state', 'in', ['draft', 'sent']), ('date_order', '>=', date_begin), ('date_order', '<=', date_end)]
             res[id]['monthly_quoted'] = self.__get_bar_values(cr, uid, obj, created_domain, ['amount_total', 'date_order'], 'amount_total', 'date_order', context=context)
-            validated_domain = [('section_id', '=', id), ('state', 'not in', ['draft', 'sent']), ('date_confirm', '>=', groupby_begin)]
+            validated_domain = [('section_id', '=', id), ('state', 'not in', ['draft', 'sent']), ('date_confirm', '>=', date_begin), ('date_order', '<=', date_end)]
             res[id]['monthly_confirmed'] = self.__get_bar_values(cr, uid, obj, validated_domain, ['amount_total', 'date_confirm'], 'amount_total', 'date_confirm', context=context)
         return res