diff --git a/addons/hr_holidays/hr_holidays.py b/addons/hr_holidays/hr_holidays.py
index c7d7867911d..be8330c40a0 100644
--- a/addons/hr_holidays/hr_holidays.py
+++ b/addons/hr_holidays/hr_holidays.py
@@ -182,6 +182,16 @@ class hr_holidays(osv.osv):
         ('date_check2', "CHECK ( (type='add') OR (date_from <= date_to))", "The start date must be anterior to the end date."),
         ('date_check', "CHECK ( number_of_days_temp >= 0 )", "The number of days must be greater than 0."),
     ]
+    
+    def copy(self, cr, uid, id, default=None, context=None):
+        if default is None:
+            default = {}
+        if context is None:
+            context = {}
+        default = default.copy()
+        default['date_from'] = False
+        default['date_to'] = False
+        return super(hr_holidays, self).copy(cr, uid, id, default, context=context)
 
     def _create_resource_leave(self, cr, uid, leaves, context=None):
         '''This method will create entry in resource calendar leave object at the time of holidays validated '''