diff --git a/content/_data/platzhalter.yaml b/content/_data/platzhalter.yaml
index 1303d74d..6dc30bca 100644
--- a/content/_data/platzhalter.yaml
+++ b/content/_data/platzhalter.yaml
@@ -6,12 +6,12 @@ events:
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-02-18 19:30:00.000000000 +01:00
+  startdate: 2021-02-11 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-03-18 19:30:00.000000000 +01:00
+  startdate: 2021-03-11 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
@@ -21,12 +21,12 @@ events:
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-05-20 19:30:00.000000000 +01:00
+  startdate: 2021-05-13 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-06-17 19:30:00.000000000 +01:00
+  startdate: 2021-06-10 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
@@ -36,7 +36,7 @@ events:
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-08-19 19:30:00.000000000 +01:00
+  startdate: 2021-08-12 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
@@ -46,17 +46,17 @@ events:
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-10-21 19:30:00.000000000 +02:00
+  startdate: 2021-10-14 19:30:00.000000000 +02:00
   duration: 2h
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-11-18 19:30:00.000000000 +01:00
+  startdate: 2021-11-11 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib
 - title: CCCS Vortragsreihe (Thema noch offen)
-  startdate: 2021-12-16 19:30:00.000000000 +01:00
+  startdate: 2021-12-09 19:30:00.000000000 +01:00
   duration: 2h
   location:
     location: bib