diff --git a/imio_teleservices_templatetags/templatetags/imio_teleservices.py b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
index 7cd83f8..940c032 100644
--- a/imio_teleservices_templatetags/templatetags/imio_teleservices.py
+++ b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
@@ -3,6 +3,7 @@ import re
 from decimal import Decimal
 
 import requests
+from dateutil.relativedelta import relativedelta
 from django import template
 from django.utils.safestring import SafeText
 from wcs.qommon import misc
@@ -80,7 +81,10 @@ def get_birthday_from_nn(numero_national):
     """
     numero_national = clean_string(numero_national)
     date = numero_national[:6]
-    return datetime.datetime.strptime(date, "%y%m%d")
+    birthday = datetime.datetime.strptime(date, "%y%m%d")
+    if birthday > datetime.datetime.now():
+        birthday -= relativedelta(years=100)
+    return birthday
 
 
 @register.filter