diff --git a/fiscalyear.py b/fiscalyear.py
index 5a96934057..f98d0b1547 100644
--- a/fiscalyear.py
+++ b/fiscalyear.py
@@ -25,9 +25,11 @@ class FiscalYear(ModelSQL, ModelView):
     name = fields.Char('Name', size=None, required=True, depends=DEPENDS)
     code = fields.Char('Code', size=None)
     start_date = fields.Date('Starting Date', required=True, states=STATES,
-            depends=DEPENDS)
+        domain=[('start_date', '<=', Eval('end_date', None))],
+        depends=DEPENDS + ['end_date'])
     end_date = fields.Date('Ending Date', required=True, states=STATES,
-            depends=DEPENDS)
+        domain=[('end_date', '>=', Eval('start_date', None))],
+        depends=DEPENDS + ['start_date'])
     periods = fields.One2Many('account.period', 'fiscalyear', 'Periods',
             states=STATES, depends=DEPENDS)
     state = fields.Selection([
diff --git a/period.py b/period.py
index 36f3de4115..f3ce207e85 100644
--- a/period.py
+++ b/period.py
@@ -22,9 +22,11 @@ class Period(ModelSQL, ModelView):
     name = fields.Char('Name', required=True)
     code = fields.Char('Code')
     start_date = fields.Date('Starting Date', required=True, states=_STATES,
-        depends=_DEPENDS, select=True)
+        domain=[('start_date', '<=', Eval('end_date', None))],
+        depends=_DEPENDS + ['end_date'], select=True)
     end_date = fields.Date('Ending Date', required=True, states=_STATES,
-        depends=_DEPENDS, select=True)
+        domain=[('end_date', '>=', Eval('start_date', None))],
+        depends=_DEPENDS + ['start_date'], select=True)
     fiscalyear = fields.Many2One('account.fiscalyear', 'Fiscal Year',
         required=True, states=_STATES, depends=_DEPENDS, select=True)
     state = fields.Selection([