diff --git a/bin/addons/base/ir/ir_actions.py b/bin/addons/base/ir/ir_actions.py
index 00c61d66505..487dab41619 100644
--- a/bin/addons/base/ir/ir_actions.py
+++ b/bin/addons/base/ir/ir_actions.py
@@ -176,6 +176,11 @@ class act_window(osv.osv):
 						find = True
 						continue
 					res[act.id].append((False, t))
+
+				if 'calendar' not in modes:
+					mobj = self.pool.get(act.res_model)
+					if mobj._date_name in mobj._columns:
+						res[act.id].append((False, 'calendar'))
 		return res
 
 	_columns = {