diff --git a/content/page/amateurfunk.md b/content/page/amateurfunk.md
index 24066f0..12547fd 100644
--- a/content/page/amateurfunk.md
+++ b/content/page/amateurfunk.md
@@ -2,6 +2,9 @@
 title: "Amateurfunk"
 subtitle: "Funken und Löten im CCCB"
 date: 2018-05-17T22:41:48+02:00
+dtstart: 20180709T200000
+dtend: 20180709T220000
+rrule: "FREQ=WEEKLY;BYDAY=MO;INTERVAL=1"
 menu:
   main:
     parent: "veranstaltungen"
diff --git a/content/page/chaosradio.md b/content/page/chaosradio.md
index cbe6b9e..177f824 100644
--- a/content/page/chaosradio.md
+++ b/content/page/chaosradio.md
@@ -2,6 +2,10 @@
 title: "Chaosradio"
 subtitle: "Der Podcast im Radio"
 date: 2018-05-17T22:47:26+02:00
+rrule: "FREQ=MONTHLY;BYSETPOS=-1;BYDAY=TH;INTERVAL=1"
+dtstart: 20180628T220000
+dtend: 20180629T000000
+location: "CCCB oder Fritz"
 menu:
   main:
     parent: "veranstaltungen"
diff --git a/content/page/clubdiscordia.md b/content/page/clubdiscordia.md
index d52abed..9f34cd1 100644
--- a/content/page/clubdiscordia.md
+++ b/content/page/clubdiscordia.md
@@ -2,6 +2,9 @@
 title: "Club Discordia"
 subtitle: "Die offenen Abende im CCCB"
 date: 2018-05-17T22:59:56+02:00
+dtstart: 2018070300000
+dtend: 20180704T000000
+rrule: "FREQ=WEEKLY;BYDAY=TU,TH;INTERVAL=1"
 menu:
   main:
     parent: "veranstaltungen"
diff --git a/content/page/cms.md b/content/page/cms.md
index c827750..f2c5ea9 100644
--- a/content/page/cms.md
+++ b/content/page/cms.md
@@ -2,6 +2,9 @@
 title: "Chaos macht Schule"
 subtitle: "Technikkompetenzvermittlung"
 date: 2018-05-18T01:11:54+02:00
+rrule: "FREQ=MONTHLY;BYSETPOS=1;BYDAY=TH;INTERVAL=1"
+dtstart: 20180705T190000
+dtend: 20180705T230000
 menu:
   main:
     parent: "veranstaltungen"
diff --git a/content/page/coderdojo.md b/content/page/coderdojo.md
index e9f9ab9..f613c7d 100644
--- a/content/page/coderdojo.md
+++ b/content/page/coderdojo.md
@@ -2,6 +2,7 @@
 title: "Coder Dojo"
 subtitle: Hacken und Coden für Kinder 
 date: 2018-05-18T09:51:02+02:00
+rrule: "FREQ=MONTHLY;BYSETPOS=3;BYDAY=SA;INTERVAL=1"
 menu:
   main:
     parent: "veranstaltungen"
@@ -10,6 +11,8 @@ menu:
 
 Wir hosten den [Coder Dojo Berlin Mitte](https://zen.coderdojo.com/dojo/de/berlin/berlin-mitte).
 
+Er findet jeden dritten Samstag im Monat von 14 bis 17 Uhr statt.
+
 ## Bitte vorher anmelden
 Schickt uns bitte eine Email an <hello@mitte.coderdojo.berlin>, um Euch zu registrieren.
 Wenn Ihr einen Leih-Laptop braucht, sagt einfach Bescheid.
diff --git a/content/page/plenum.md b/content/page/plenum.md
index 7fd318b..21daaef 100644
--- a/content/page/plenum.md
+++ b/content/page/plenum.md
@@ -2,12 +2,12 @@
 title: "Plenum"
 subtitle: "Instrument der internen Konsensfindung"
 date: 2018-05-18T01:11:54+02:00
+rrule: "FREQ=MONTHLY;BYSETPOS=1;BYDAY=WE;INTERVAL=1"
+dtstart: 20180704T200000
+dtend: 20180704T220000
 menu:
   main:
     parent: "verein"
-outputs:
-  - html
-  - calendar
 ---
 
 Das Plenum findet am ersten Mittwoch des Monats ab 20:00 Uhr in den Clubräumen
diff --git a/layouts/page/single.ics b/layouts/page/single.ics
new file mode 100644
index 0000000..c02ba10
--- /dev/null
+++ b/layouts/page/single.ics
@@ -0,0 +1,43 @@
+{{if isset .Params "rrule"}}
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//cccb//datengarten calendar//EN
+CALSCALE:GREGORIAN
+METHOD:PUBLISH
+BEGIN:VTIMEZONE
+TZID:Europe/Berlin
+X-LIC-LOCATION:Europe/Berlin
+BEGIN:DAYLIGHT
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+TZNAME:CEST
+DTSTART:19700329T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+TZNAME:CET
+DTSTART:19701025T030000
+RRULE:{{.Params.rrule}}
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+ORGANIZER;CN="CCCB":mailto:mail@berlin.ccc.de
+SUMMARY:{{.Title}}
+UID: {{.Title}}@berlin.ccc.de
+SEQUENCE:0
+STATUS:CONFIRMED
+DTSTAMP:20180508T200000Z
+DTSTART;TZID=Europe/Berlin:{{.Params.dtstart}}
+DTEND;TZID=Europe/Berlin:{{.Params.dtend}}
+RRULE:{{.Params.rrule}}
+{{if isset .Params "rrule_excludes" }}
+{{range .Params.rrule_excludes }}
+EXDATE;TZID=Europe/Berlin:{{dateFormat "20060102T150405" . }} 
+{{end -}}
+{{end -}}
+LOCATION:{{with .Params.location}}{{.}}{{else}}CCCB{{end}}
+URL:{{.Permalink}}
+END:VEVENT
+END:VCALENDAR
+{{end -}}