diff --git a/db/seeds.rb b/db/seeds.rb
index 20a12fc9ab29b141cd00bf97fa5494364bbb5b9e..d3d231ae6a8d53d1fdc87fbc0998db11a2b99a90 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -256,7 +256,7 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241227-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-27T19:00:00+01:00"
-  shift_.ends_at = "2024-12-27T23:00:00+01:00"
+  shift_.ends_at = "2024-12-27T22:00:00+01:00"
   shift_.save!
 end
 Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241227-1900").tap do |shift_|
@@ -265,7 +265,7 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241227-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-27T19:00:00+01:00"
-  shift_.ends_at = "2024-12-27T23:00:00+01:00"
+  shift_.ends_at = "2024-12-27T22:00:00+01:00"
   shift_.save!
 end
 Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241228-1900").tap do |shift_|
@@ -274,7 +274,7 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241228-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-28T19:00:00+01:00"
-  shift_.ends_at = "2024-12-28T23:00:00+01:00"
+  shift_.ends_at = "2024-12-28T22:00:00+01:00"
   shift_.save!
 end
 Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241228-1900").tap do |shift_|
@@ -283,7 +283,7 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241228-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-28T19:00:00+01:00"
-  shift_.ends_at = "2024-12-28T23:00:00+01:00"
+  shift_.ends_at = "2024-12-28T22:00:00+01:00"
   shift_.save!
 end
 Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241229-1900").tap do |shift_|
@@ -292,7 +292,7 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241229-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-29T19:00:00+01:00"
-  shift_.ends_at = "2024-12-29T23:00:00+01:00"
+  shift_.ends_at = "2024-12-29T22:00:00+01:00"
   shift_.save!
 end
 Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241229-1900").tap do |shift_|
@@ -301,7 +301,62 @@ Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241229-1900").
   shift_.language = "en"
   shift_.url = "https://rescheduled.c3lingo.org/"
   shift_.starts_at = "2024-12-29T19:00:00+01:00"
-  shift_.ends_at = "2024-12-29T23:00:00+01:00"
+  shift_.ends_at = "2024-12-29T22:00:00+01:00"
+  shift_.save!
+end
+
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241227-2200").tap do |shift_|
+  shift_.stage = stage_standby
+  shift_.title = "Standby Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-27T22:00:00+01:00"
+  shift_.ends_at = "2024-12-28T01:20:00+01:00"
+  shift_.save!
+end
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241227-2200").tap do |shift_|
+  shift_.stage = stage_coordinator
+  shift_.title = "Coordinator Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-27T22:00:00+01:00"
+  shift_.ends_at = "2024-12-28T02:40:00+01:00"
+  shift_.save!
+end
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241228-2200").tap do |shift_|
+  shift_.stage = stage_standby
+  shift_.title = "Standby Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-28T22:00:00+01:00"
+  shift_.ends_at = "2024-12-29T01:20:00+01:00"
+  shift_.save!
+end
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241228-2200").tap do |shift_|
+  shift_.stage = stage_coordinator
+  shift_.title = "Coordinator Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-28T22:00:00+01:00"
+  shift_.ends_at = "2024-12-29T02:25:00+01:00"
+  shift_.save!
+end
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-01-20241229-2200").tap do |shift_|
+  shift_.stage = stage_standby
+  shift_.title = "Standby Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-29T22:00:00+01:00"
+  shift_.ends_at = "2024-12-30T01:00:00+01:00"
+  shift_.save!
+end
+Session.find_or_create_by(conference: orga, ref_id: "c3-4242-02-20241229-2200").tap do |shift_|
+  shift_.stage = stage_coordinator
+  shift_.title = "Coordinator Shift"
+  shift_.language = "en"
+  shift_.url = "https://rescheduled.c3lingo.org/"
+  shift_.starts_at = "2024-12-29T22:00:00+01:00"
+  shift_.ends_at = "2024-12-30T02:15:00+01:00"
   shift_.save!
 end