diff --git a/templates/calendar.ics.twig b/templates/calendar.ics.twig
index 41f8160..0432d55 100644
--- a/templates/calendar.ics.twig
+++ b/templates/calendar.ics.twig
@@ -4,12 +4,13 @@ VERSION:2.0
 {% for nid, node in ror.calendar.nodes %}
 
 BEGIN:VEVENT
-SUMMARY: {{node.title.0.value}}
-UID: node-{{node.nid.0.value}}@www.ondarossa.info
-DTSTAMP: {{node.created.0.value}}
-DTSTART: {{node.field_data_evento.0.value|date("Ymd\\THis")}}Z
-DURATION: PT1H
-URL: http://www.ondarossa.info{{node.path.0.alias}}
+SUMMARY:{{node.title.0.value}}
+UID:node-{{node.nid.0.value}}@www.ondarossa.info
+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
+URL:http://www.ondarossa.info{{node.path.0.alias}}
 END:VEVENT
 {% endfor %}
 END:VCALENDAR