diff --git a/_events/20180726-osm.markdown b/_events/20180726-osm.markdown
index aa54466d1d0ca46494ca15c7139fbf828fa796e0..883b780f13791dcd339219ef2795fe2646c43f5b 100644
--- a/_events/20180726-osm.markdown
+++ b/_events/20180726-osm.markdown
@@ -2,8 +2,10 @@
 title:  "112 OSM-Stammtisch"
 image: "/assets/osmback.png"
 eventdate:   2018-07-26 19:00:00 +0200
+eventend:   2018-07-26 23:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: 72b2c93d-ecef-486d-a98f-eb795df9aa64
+contact:
 locations:
  - Augenprüfraum
 short: "Monatlicher Stammtisch von und für Open Street Map Begeisterte"
diff --git a/_events/20180801-openspace.markdown b/_events/20180801-openspace.markdown
index a4d9225e117689ab7578a402eee21b9ee4303e7c..8a53b82e4e3c7e24d5e8932da237ca85990b6efc 100644
--- a/_events/20180801-openspace.markdown
+++ b/_events/20180801-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-08-01 19:00:00 +0200
+eventend:   2018-08-01 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 46308419-caab-4f21-b3b4-fe758075cc7f
 locations:
diff --git a/_events/20180808-openspace.markdown b/_events/20180808-openspace.markdown
index 17552239782df43e2d0b3c764e044218976a2a09..3c5bb0e3105f4d5499371e198602e85d9d7592d5 100644
--- a/_events/20180808-openspace.markdown
+++ b/_events/20180808-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-08-08 19:00:00 +0200
+eventend:   2018-08-08 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 1a768206-8b34-4448-af3a-8ac544759b93
 locations:
diff --git a/_events/20180809-plenum.markdown b/_events/20180809-plenum.markdown
index 9689630ae8ff107da30bee2ef1c01515e1032434..3d5a7b3a8b92e68200286fe70523e4383984271d 100644
--- a/_events/20180809-plenum.markdown
+++ b/_events/20180809-plenum.markdown
@@ -2,6 +2,7 @@
 title:  "Plenum"
 image: "/assets/wall.png"
 eventdate:   2018-08-09 19:00:00 +0200
+eventend:   2018-08-09 22:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: c674f49e-a503-4547-a297-9d27906a50c1
 locations:
diff --git a/_events/20180810-freitalk.markdown b/_events/20180810-freitalk.markdown
index d92172c52af2201c3446e7a8d5196cb9865ed564..648308d0c1ededa3750ba7cd533f9453dbf1a9ab 100644
--- a/_events/20180810-freitalk.markdown
+++ b/_events/20180810-freitalk.markdown
@@ -2,6 +2,7 @@
 title:  "Freitalk: Kassensturz. Wie geht es dem Verein nach dem Umzug."
 image: "/assets/wall.png"
 eventdate:   2018-08-10 19:00:00 +0200
+eventend:   2018-08-10 21:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: 73c34c96-7007-453b-82ce-b4fefc9514da
 locations:
diff --git a/_events/20180813-iuventa.markdown b/_events/20180813-iuventa.markdown
index e757e0c3d358fbec4faab4ee96841f4702c0503b..85073ac904fa9ba350edce5fd0c433644cd4ad84 100644
--- a/_events/20180813-iuventa.markdown
+++ b/_events/20180813-iuventa.markdown
@@ -3,6 +3,7 @@ layout: event
 title:  "Dokumentarfilm: Iuventa"
 image: "/assets/f11.jpg"
 eventdate:   2018-08-13 22:25:00 +0200
+eventend:   2018-08-13 23:59:59 +0200
 pretix: https://pretix.chaotikum.org/chaotikum/iuventa/
 #https://www.uuidgenerator.net/
 uid: 9fc2e4ba-7e3b-4b5d-9b4d-57304f5c1cce
diff --git a/_events/20180815-openspace.markdown b/_events/20180815-openspace.markdown
index 84262b31912dfe0d30cbea9d33790359c8955a39..d5884885fc7ea650593a9bbd24d10ed6878c232e 100644
--- a/_events/20180815-openspace.markdown
+++ b/_events/20180815-openspace.markdown
@@ -3,6 +3,7 @@ layout: event
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-08-15 19:00:00 +0200
+eventend:   2018-08-15 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 017ac132-7157-41df-845f-7a77fd6c56f3
 locations:
diff --git a/_events/20180816-ffhl-orga.markdown b/_events/20180816-ffhl-orga.markdown
index d8f8f2537a50d9342f1a12c29633c3ea74e4260e..b5da244a635c0d3f3e526d441cd27187eee6d2f8 100644
--- a/_events/20180816-ffhl-orga.markdown
+++ b/_events/20180816-ffhl-orga.markdown
@@ -3,6 +3,7 @@ layout: event
 title:  "FFHL Orga"
 image: "/assets/ff.jpg"
 eventdate:   2018-08-16 19:00:00 +0200
+eventend:   2018-08-16 22:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: cbdb0927-6343-42f2-8316-1267eff50634
 locations:
diff --git a/_events/20180821-netzpolitik.markdown b/_events/20180821-netzpolitik.markdown
index 6c3843fa4b815a3fff87cf8fca78e54ad52a338d..91bae444a77b3387590dcbf5a882af0fcffed901 100644
--- a/_events/20180821-netzpolitik.markdown
+++ b/_events/20180821-netzpolitik.markdown
@@ -3,6 +3,7 @@ layout: event
 title:  "Netzpolitischer Abend des Chaotikums"
 image: "/assets/blog.jpg"
 eventdate:   2018-08-21 19:00:00 +0200
+eventend:   2018-08-21 22:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: ae2503f6-a39b-4cf6-a273-ba2ca72fed7f
 locations:
diff --git a/_events/20180822-openspace.markdown b/_events/20180822-openspace.markdown
index 559421e8235f059687d4ca27d0cdaa08747df34e..b7817701c317b50bb242d3a4270e4ec99acbf931 100644
--- a/_events/20180822-openspace.markdown
+++ b/_events/20180822-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-08-22 19:00:00 +0200
+eventend:   2018-08-22 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 86f8f20f-a509-4765-b021-90c73c82d0e1
 locations:
diff --git a/_events/20180823-osm.markdown b/_events/20180823-osm.markdown
index 82fb65ad0de4a622621081d3601ad8f50dd80eee..11c6fc99dff2a63e2bd04bbaf320a2186b67d261 100644
--- a/_events/20180823-osm.markdown
+++ b/_events/20180823-osm.markdown
@@ -2,6 +2,7 @@
 title:  "113 OSM-Stammtisch"
 image: "/assets/osmback.png"
 eventdate:   2018-08-23 19:00:00 +0200
+eventend: 2018-08-23 22:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: 1f2a4a86-c4a6-4c31-aa42-edbd44fb2cbe
 locations:
diff --git a/_events/20180829-openspace.markdown b/_events/20180829-openspace.markdown
index 5849213aa09c2474803b3132df66ec55ddec641d..76e2be721f41c1ff5845b04b4da5f8eb6e9047c0 100644
--- a/_events/20180829-openspace.markdown
+++ b/_events/20180829-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-08-29 19:00:00 +0200
+eventend:   2018-08-29 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 65e43a5f-80a7-4fa6-9865-2bef8c68d3af
 locations:
diff --git a/_events/20180901-eroefnungsfeier.markdown b/_events/20180901-eroefnungsfeier.markdown
index 296923a7d0af77b80df1e5bed88ca3f2d618a3f1..5df128e3e63d126e4726227a6b4d6a556ec96544 100644
--- a/_events/20180901-eroefnungsfeier.markdown
+++ b/_events/20180901-eroefnungsfeier.markdown
@@ -2,6 +2,7 @@
 title:  "Eröffnungsfeier"
 image: "/assets/f11.jpg"
 eventdate:   2018-09-01 14:00:00 +0200
+eventend: 2018-09-02 05:00:00 +0200
 #https://www.uuidgenerator.net/
 uid: d973ba97-aed6-4998-af91-450a1bb62286
 poster: https://wiki.chaotikum.org/_media/undefined:einweihung.jpg
diff --git a/_events/20180905-openspace.markdown b/_events/20180905-openspace.markdown
index 4f5595e1f6d8900b570f5e21c8b671911125aed2..49feeb56fe08eeb37fe2377deb65b5a4fcb9bb2a 100644
--- a/_events/20180905-openspace.markdown
+++ b/_events/20180905-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-09-05 19:00:00 +0200
+eventend:   2018-09-05 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 57b78d55-ab84-4129-b34a-394e45489ea6
 locations:
diff --git a/_events/20180912-openspace.markdown b/_events/20180912-openspace.markdown
index 223087909572ec3e3ee8f9b603a35e018efb03e8..73a1ba4250f7e2fdec0fec91517d8d375da704ef 100644
--- a/_events/20180912-openspace.markdown
+++ b/_events/20180912-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-09-12 19:00:00 +0200
+eventend:   2018-09-12 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 63d895a0-befe-4a3f-b20b-a0fc633d2c73
 locations:
diff --git a/_events/20180919-openspace.markdown b/_events/20180919-openspace.markdown
index 457e03ac68191122f212557c83d34333407da35d..a97c14ce3609846b30f815f9e7b757e399243f86 100644
--- a/_events/20180919-openspace.markdown
+++ b/_events/20180919-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-09-19 19:00:00 +0200
+eventend:   2018-09-19 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: e187ae32-8c17-41d4-8395-8527ac197d07
 locations:
diff --git a/_events/20180926-openspace.markdown b/_events/20180926-openspace.markdown
index 8a5838e0f8d781b2d5b7e738311e7c32c057e71f..27b5650a86d1227d95b5edd4613a4a74e84fd7df 100644
--- a/_events/20180926-openspace.markdown
+++ b/_events/20180926-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-09-26 19:00:00 +0200
+eventend:   2018-09-26 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 57ff4647-8ffd-4a09-84c7-ff1247b682a6
 locations:
diff --git a/_events/20181003-openspace.markdown b/_events/20181003-openspace.markdown
index a1d7ac2358abd3fbdb64fc77f63a1ec51f93639f..3b1e0e08736e644c5ae630ceb216d97bcecace78 100644
--- a/_events/20181003-openspace.markdown
+++ b/_events/20181003-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-10-03 19:00:00 +0200
+eventend:   2018-10-03 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: b73658e4-b22f-404a-9989-1b3d2164b1d0
 locations:
diff --git a/_events/20181010-openspace.markdown b/_events/20181010-openspace.markdown
index 2a7ec163368b73349feccadcdc77f1f627c3ce81..b34fdb685d3f4984dddea7d5e68b53081a8da9c4 100644
--- a/_events/20181010-openspace.markdown
+++ b/_events/20181010-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-10-10 19:00:00 +0200
+eventend:   2018-10-10 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 202142d9-d224-47f1-93f3-b810b19615b0
 locations:
diff --git a/_events/20181017-openspace.markdown b/_events/20181017-openspace.markdown
index 61e59659a5876e4f2cbd9026fd934899cbac31df..d464a9cb5205c2d677cd127185bbc8ab18b17f75 100644
--- a/_events/20181017-openspace.markdown
+++ b/_events/20181017-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-10-17 19:00:00 +0200
+eventend:   2018-10-17 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 8913adac-d6ed-46de-adf6-7a4c36975a0a
 locations:
diff --git a/_events/20181024-openspace.markdown b/_events/20181024-openspace.markdown
index 950dffe0479901ce27c0d53d4cf70f13eacf436b..469026be7bb22eb634592a686ea68d9f45573f9c 100644
--- a/_events/20181024-openspace.markdown
+++ b/_events/20181024-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-10-24 19:00:00 +0200
+eventend:   2018-10-24 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: ecf54621-dfd8-48b3-895e-641f4e898863
 locations:
diff --git a/_events/20181027-table-top-day.markdown b/_events/20181027-table-top-day.markdown
index 4e6966e97d9d4c0c838e33122b88c55f4b9e2e2a..a6c8aa5eaa65cf6f26da4c71adccee17689bf19a 100644
--- a/_events/20181027-table-top-day.markdown
+++ b/_events/20181027-table-top-day.markdown
@@ -2,6 +2,7 @@
 title:  "Table Top Day"
 image: "/assets/tabletop.jpg"
 eventdate:   2018-10-31 19:00:00 +0200
+eventend:    2018-10-31 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 4138cb84-a3a1-44ce-9661-233a7b932afa
 locations:
diff --git a/_events/20181031-openspace.markdown b/_events/20181031-openspace.markdown
index dd5ab724a3afc4ae92a20de6bf1407982d80a1ea..32d3647fcbbe951fe06069fdeca99a3d3176bd3e 100644
--- a/_events/20181031-openspace.markdown
+++ b/_events/20181031-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-10-31 19:00:00 +0200
+eventend:   2018-10-31 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 7e4d9d02-b41c-46d6-af77-f6aed3a0ef90
 locations:
diff --git a/_events/20181107-openspace.markdown b/_events/20181107-openspace.markdown
index 49f9aa9a13b9aaaef7edf3309dc361accc54a372..7b5d1543a75dcd18336924d58f8e87a727e7c708 100644
--- a/_events/20181107-openspace.markdown
+++ b/_events/20181107-openspace.markdown
@@ -2,6 +2,7 @@
 title:  "Open Space/Chaostreff"
 image: "/assets/geloet.jpg"
 eventdate:   2018-11-07 19:00:00 +0200
+eventend:   2018-11-07 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: ec5a1c64-9ce5-452c-8cf4-c246ecd4c0b4
 locations:
diff --git a/_events/20181109-metanook.markdown b/_events/20181109-metanook.markdown
index e00da7d7b065fe014a6c9a0621b3f1770d7bd8b1..1b49a6809f3a837ff0e74772c054e0e8c23c5b5e 100644
--- a/_events/20181109-metanook.markdown
+++ b/_events/20181109-metanook.markdown
@@ -2,6 +2,7 @@
 title:  "MetaNook"
 image: "/assets/geloet.jpg"
 eventdate:   2018-11-09 17:00:00 +0200
+eventend:    2018-11-09 23:59:59 +0200
 #https://www.uuidgenerator.net/
 uid: 5764b1fa-3f34-41d9-bfff-c84ab552c97d
 locations:
diff --git a/events.ics b/events.ics
index 39a434d1070ba2caf167a89abc2c421e88b768bd..33d7b75b41e75808c44aa4db03eb1d3f169d3047 100644
--- a/events.ics
+++ b/events.ics
@@ -14,8 +14,8 @@ SUMMARY:{{ event.title | xml_escape }}
 DESCRIPTION:{% for i in (1..rounds) %}{{ event.short | slice: start, linelength }}{% assign start = start | plus: linelength %}
     {% endfor%}{{ event.short | slice: start, extra }}
 CLASS:PUBLIC
-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
+DTSTART;TZID=Europe/Berlin:{{ event.eventdate | date: "%Y%m%d" }}T{{ event.eventdate | date: "%H%M%S" }}
+DTSTART;TZID=Europe/Berlin:{{ event.eventend | date: "%Y%m%d" }}T{{ event.eventend | date: "%H%M%S" }}
 DTSTAMP:{{ event.eventdate | date: "%Y%m%d" }}T{{ event.eventdate | date: "%H%M%S" }}Z
 END:VEVENT
 {% endfor %}END:VCALENDAR