diff --git a/content/ical.txt b/content/ical.txt
index 2865b4b4..52d6e80c 100644
--- a/content/ical.txt
+++ b/content/ical.txt
@@ -9,7 +9,7 @@ cal = RiCal.Calendar do |cal|
       event.summary = e[:title]
       event.description = ""
       event.dtstart = e[:startdate]
-      event.dtend = e[:enddate]
+      event.dtend = (e[:enddate]+1)  # Unclear RFC definition, see http://www.bedework.org/trac/bedework/wiki/Bedework/DevDocs/DtstartEndNotes
       if e[:location]
         if e[:location][:details]
           event.location = "#{e[:location][:name]}, #{e[:location][:details]}"