diff --git a/app/models/conference.rb b/app/models/conference.rb
index 58cc590..f1a4fa5 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -4,7 +4,7 @@ class Conference < ActiveRecord::Base
   validates :description, presence: true
   validates :start_date, presence: true
   validates :end_date, presence: true
-  validate :end_date_is_before_start_date
+  validate :start_date_is_before_end_date
 
   translates :title, :description
 
@@ -15,37 +15,15 @@ class Conference < ActiveRecord::Base
 
   accepts_nested_attributes_for :tracks, :halls, reject_if: :all_blank, allow_destroy: true
 
-  scope :future, -> { where('start_date >= ?', Date.today).order('start_date ASC') }
-
   before_save :close_all_other_calls_for_papers
 
-  def self.current
-    future.first || last
-  end
-
-  def submissions_grouped_by_day
-    submissions = Event.where(track: tracks, created_at: created_at..start_date)
-    submissions = submissions.group('date(created_at)')
-    submissions = submissions.select('created_at, count(id) as number')
-    submissions.group_by { |s| s.created_at.to_date }
-  end
-
-  def submissions_grouped_by_confirmation_day
-    submissions = Event.approved.where(track: tracks, created_at: created_at..start_date).where.not(confirmed_at: nil)
-    submissions = submissions.group('date(confirmed_at)')
-    submissions = submissions.select('confirmed_at, count(id) as number')
-    submissions.group_by { |s| s.confirmed_at.to_date }
-  end
-
   private
 
   def close_all_other_calls_for_papers
-    if call_for_papers_open? and call_for_papers_open_changed?
-      Conference.where.not(id: self.id).update_all call_for_papers_open: false
-    end
+    Conference.where.not(id: self.id).update_all call_for_papers_open: false
   end
 
-  def end_date_is_before_start_date
+  def start_date_is_before_end_date
     if start_date.present? and end_date.present? and start_date > end_date
       errors.add(:end_date, :cannot_be_before_start_date)
     end
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index ab32526..d7ec8d7 100644
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -10,6 +10,11 @@ RSpec.describe Conference, :type => :model do
       create :conference, title: 'ExampleConf'
       expect(build(:conference, title: 'ExampleConf')).to have_error_on :title
     end
+
+    it 'must be translatable' do
+      conference = build(:conference)
+      expect(conference).to have_translatable :title
+    end
   end
 
   describe 'email' do
@@ -24,8 +29,14 @@ RSpec.describe Conference, :type => :model do
     end
   end
 
-  it 'is invalid without a description' do
-    expect(build(:conference, description: '')).to have_error_on :description
+  describe 'description' do
+    it 'must be present' do
+      expect(build(:conference, description: '')).to have_error_on :description
+    end
+
+    it 'must be translatable' do
+      expect(build(:conference)).to have_translatable :description
+    end
   end
 
   it 'is invalid without a start date' do
@@ -39,18 +50,4 @@ RSpec.describe Conference, :type => :model do
   it 'is invalid when the end date is before the start date' do
     expect(build(:conference, start_date: '2014-07-29 21:29:13', end_date: '2014-07-28 01:00:00')).to have_error_on :end_date
   end
-
-  describe '::current' do
-    it 'returns the next conference if there is one' do
-      create :past_conference
-      conference = create :future_conference
-      create :future_conference, start_date: Date.today + 100.years, end_date: Date.today + 150.years
-      expect(Conference.current).to eq conference
-    end
-
-    it 'returns the last conference if there is no future conference' do
-      conference = create :past_conference
-      expect(Conference.current).to eq conference
-    end
-  end
 end
diff --git a/spec/support/matchers/has_translatable.rb b/spec/support/matchers/has_translatable.rb
new file mode 100644
index 0000000..cef584d
--- /dev/null
+++ b/spec/support/matchers/has_translatable.rb
@@ -0,0 +1,14 @@
+RSpec::Matchers.define :have_translatable do |expected|
+  match do |actual|
+    I18n.locale = :bg
+    actual.send "#{expected.to_s}=", 'Test Bulgarian'
+
+    I18n.locale = :en
+    actual.send "#{expected.to_s}=", 'Test English'
+
+    expect(actual.send expected).to eq 'Test English'
+
+    I18n.locale = :bg
+    expect(actual.send expected).to eq 'Test Bulgarian'
+  end
+end