diff --git a/templates/calendar.ics.twig b/templates/calendar.ics.twig
index 0432d55..bb3b5ce 100644
--- a/templates/calendar.ics.twig
+++ b/templates/calendar.ics.twig
@@ -6,7 +6,7 @@ VERSION:2.0
 BEGIN:VEVENT
 SUMMARY:{{node.title.0.value}}
 UID:node-{{node.nid.0.value}}@www.ondarossa.info
-DTSTAMP:{{node.created.0.value|date("Ymd\\This")}}Z
+DTSTAMP:{{node.created.0.value|date("Ymd\\THis")}}Z
 DTSTART:{{node.field_data_evento.0.value|date("Ymd\\THis")}}Z
 DURATION:PT1H
 DTEND:{{node.field_data_evento.0.value|date_modify("+1 hour")|date("Ymd\\THis")}}Z