diff --git a/imio_teleservices_templatetags/templatetags/imio_teleservices.py b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
index 542d8c9..ba92067 100644
--- a/imio_teleservices_templatetags/templatetags/imio_teleservices.py
+++ b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
@@ -8,10 +8,18 @@ from django import template
 from django.utils.safestring import SafeText
 from wcs.qommon import misc
 from wcs.qommon.templatetags.qommon import unlazy
+from wcs.variables import LazyDateObject
 
 register = template.Library()
 
 
+def unlazy_date(fdate):
+    if isinstance(fdate, LazyDateObject):
+        return str(unlazy(fdate))
+    else:
+        return fdate
+
+
 @register.filter
 def clean_string(value):
     return value.replace(" ", "").replace(".", "").replace("-", "")
@@ -57,6 +65,9 @@ def diff_dates(oldest_date, newest_date):
     """
 
     def transform_date(fdate):
+        if type(fdate) == LazyDateObject:
+            fdate = unlazy(fdate)
+        fdate = fdate[:10]
         if "/" in fdate:
             return datetime.datetime.strptime(fdate, "%d/%m/%Y")
         if "-" in fdate:
@@ -65,9 +76,12 @@ def diff_dates(oldest_date, newest_date):
             if len(fdate.split("-")[0]) == 2:
                 return datetime.datetime.strptime(fdate, "%d-%m-%Y")
 
-    if type(oldest_date) == SafeText:
+    oldest_date = unlazy_date(oldest_date)
+    newest_date = unlazy_date(newest_date)
+
+    if type(oldest_date) in (SafeText, str):
         oldest_date = transform_date(oldest_date)
-    if type(newest_date) == SafeText:
+    if type(newest_date) in (SafeText, str):
         newest_date = transform_date(newest_date)
     diff = abs((oldest_date - newest_date).days)
     return str(diff)