diff --git a/app/models/poll.rb b/app/models/poll.rb
index 11ac6ccb8..cc731f0b5 100644
--- a/app/models/poll.rb
+++ b/app/models/poll.rb
@@ -4,4 +4,20 @@ class Poll < ActiveRecord::Base
   has_many :questions
 
   validates :name, presence: true
+
+  scope :current,  -> { where('starts_at <= ? and ? <= ends_at', Time.now, Time.now) }
+  scope :incoming, -> { where('? < starts_at', Time.now) }
+  scope :expired,  -> { where('ends_at < ?', Time.now) }
+
+  def current?(timestamp = DateTime.now)
+    starts_at <= timestamp && timestamp <= ends_at
+  end
+
+  def incoming?(timestamp = DateTime.now)
+    timestamp < starts_at
+  end
+
+  def expired?(timestamp = DateTime.now)
+    ends_at < timestamp
+  end
 end
diff --git a/spec/factories.rb b/spec/factories.rb
index abeff338c..7f9b0b63e 100644
--- a/spec/factories.rb
+++ b/spec/factories.rb
@@ -265,6 +265,19 @@ FactoryGirl.define do
 
   factory :poll do
     sequence(:name) { |n| "Poll #{n}" }
+
+    starts_at { 1.month.ago }
+    ends_at { 1.month.from_now }
+
+    trait :incoming do
+      starts_at { 2.days.from_now }
+      ends_at { 1.month.from_now }
+    end
+
+    trait :expired do
+      starts_at { 1.month.ago }
+      ends_at { 15.days.ago }
+    end
   end
 
   factory :poll_officer, class: 'Poll::Officer' do