events.ics some errors

events.ics

@@ -11,8 +11,8 @@ ORGANIZER;CN="Chaotikum e.V.":MAILTO:{{event.contact}}
 LOCATION:Chaotikum
 SUMMARY:{{ post.short }}
 CLASS:PUBLIC
-DTSTART:{{ post.eventdate | date: "%Y%m%d" }}T{{ post.eventdate | date: "%H%M%S" }}Z
-DTEND:{{ post.eventdate | date: "%Y%m%d" }}T{{ post.eventdate | date: "%H%M%S" }}Z
-DTSTAMP:{{ post.eventdate | date: "%Y%m%d" }}T{{ post.eventdate | date: "%H%M%S" }}Z
+DTSTART:{{ event.eventdate | date: "%Y%m%d" }}T{{ event.eventdate | date: "%H%M%S" }}Z
+DTEND:{{ event.eventdate | date: "%Y%m%d" }}T{{ event.eventdate | date: "%H%M%S" }}Z
+DTSTAMP:{{ event.eventdate | date: "%Y%m%d" }}T{{ event.eventdate | date: "%H%M%S" }}Z
 END:VEVENT{% endfor %}
 END:VCALENDAR