diff --git a/app/views/admin/schedules/_day_tab.html.haml b/app/views/admin/schedules/_day_tab.html.haml
index 57be4999..61f6e862 100644
--- a/app/views/admin/schedules/_day_tab.html.haml
+++ b/app/views/admin/schedules/_day_tab.html.haml
@@ -9,7 +9,7 @@
       .room-name
         - room_date_event_schedules = date_event_schedules.select{ |e| e.room == room }
         = room.name
-      - (9*cells_per_hour..18*cells_per_hour).each do |slot|
+      - (@conference.start_hour * cells_per_hour..@conference.end_hour * cells_per_hour).each do |slot|
         - hour = slot / cells_per_hour
         - minutes = (EventType::LENGTH_STEP * (slot % cells_per_hour)).to_s.rjust(2, '0')
         - time = "#{hour}:#{minutes}"