diff --git a/app/models/conference.rb b/app/models/conference.rb
index 4162112..6c1c44e 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -15,6 +15,16 @@ class Conference < ActiveRecord::Base
 
   accepts_nested_attributes_for :tracks, :halls, reject_if: :all_blank, allow_destroy: true
 
+  def submissions_grouped_by_day
+    submissions = events.group('date(events.created_at)').select('events.created_at, count(events.id) as number')
+    submissions.group_by { |s| s.created_at.to_date }
+  end
+
+  def submissions_grouped_by_confirmation_day
+    submissions = events.approved.confirmed.group('date(events.confirmed_at)').select('events.confirmed_at, count(events.id) as number')
+    submissions.group_by { |s| s.confirmed_at.to_date }
+  end
+
   private
 
   def start_date_is_before_end_date
diff --git a/app/views/management/conferences/show.html.slim b/app/views/management/conferences/show.html.slim
index 80f90da..7ec21be 100644
--- a/app/views/management/conferences/show.html.slim
+++ b/app/views/management/conferences/show.html.slim
@@ -71,6 +71,4 @@
           span.clearfix
 .row
   .col-lg-12
-    / Unbreak this whenever the CallForParticipation model is introduced
-    / .submissions-chart#submissions-chart data-submissions="#{submissions_chart_data(@conference).to_json}"
-    .submissions-chart#submissions-chart
+    .submissions-chart#submissions-chart data-submissions="#{submissions_chart_data(@conference).to_json}"