diff --git a/app/Resources/views/admin/period/index.html.twig b/app/Resources/views/admin/period/index.html.twig
index 1ae7be599..e9b8e0f72 100644
--- a/app/Resources/views/admin/period/index.html.twig
+++ b/app/Resources/views/admin/period/index.html.twig
@@ -232,14 +232,14 @@
             <table>
                 <thead>
                     <tr>
-                        {% for key,day in days_of_week %}
+                        {% for key,day in period_service.getDaysOfWeekArray() %}
                             <th>{{ day }}</th>
                         {% endfor %}
                     </tr>
                 </thead>
                 <tbody>
                     <tr>
-                        {% for key,day in days_of_week %}
+                        {% for key,day in period_service.getDaysOfWeekArray() %}
                             <td>
                                 {% for period in periods_by_day[key] %}
                                     {% if ((filling_filter == null) and (beneficiary_filter == null))
diff --git a/app/Resources/views/period/index.html.twig b/app/Resources/views/period/index.html.twig
index 71afacd8a..c260f4d95 100644
--- a/app/Resources/views/period/index.html.twig
+++ b/app/Resources/views/period/index.html.twig
@@ -91,14 +91,14 @@ It display a page with all the avaible periods (a.k.a the "Semaine type")
             <table>
                 <thead>
                 <tr>
-                    {% for key,day in days_of_week %}
+                    {% for key,day in period_service.getDaysOfWeekArray() %}
                         <th>{{ day }}</th>
                     {% endfor %}
                 </tr>
                 </thead>
                 <tbody>
                 <tr>
-                    {% for key,day in days_of_week %}
+                    {% for key,day in period_service.getDaysOfWeekArray() %}
                         <td>
                             {% for period in periods_by_day[key] %}
                                 {% if (filling_filter == null)
diff --git a/src/AppBundle/Controller/AdminPeriodController.php b/src/AppBundle/Controller/AdminPeriodController.php
index b0c88a02b..8ac2e1b95 100644
--- a/src/AppBundle/Controller/AdminPeriodController.php
+++ b/src/AppBundle/Controller/AdminPeriodController.php
@@ -68,7 +68,6 @@ public function indexAction(Request $request, PeriodFormHelper $formHelper)
         }
 
         return $this->render('admin/period/index.html.twig', array(
-            'days_of_week' => Period::DAYS_OF_WEEK,
             'periods_by_day' => $periodsByDay,
             'filter_form' => $form->createView(),
             'week_filter' => $week_filter,
diff --git a/src/AppBundle/Controller/PeriodController.php b/src/AppBundle/Controller/PeriodController.php
index 7cc4e6fa4..fce37e1a1 100644
--- a/src/AppBundle/Controller/PeriodController.php
+++ b/src/AppBundle/Controller/PeriodController.php
@@ -53,7 +53,6 @@ public function indexAction(Request $request, PeriodFormHelper $formHelper)
         }
 
         return $this->render('period/index.html.twig', array(
-            'days_of_week' => Period::DAYS_OF_WEEK,
             'periods_by_day' => $periodsByDay,
             'filter_form' => $form->createView(),
             'week_filter' => $week_filter,
diff --git a/src/AppBundle/Entity/Period.php b/src/AppBundle/Entity/Period.php
index 35e1b4c82..34d9f6528 100644
--- a/src/AppBundle/Entity/Period.php
+++ b/src/AppBundle/Entity/Period.php
@@ -16,6 +16,7 @@ class Period
 {
     const DAYS_OF_WEEK = ["Lundi", "Mardi", "Mercredi", "Jeudi", "Vendredi", "Samedi", "Dimanche"];
     const DAYS_OF_WEEK_LIST_WITH_INT = ["Lundi" => 0, "Mardi" => 1, "Mercredi" => 2, "Jeudi" => 3, "Vendredi" => 4, "Samedi" => 5, "Dimanche" => 6];
+    const WEEK_CYCLE = ["A", "B", "C", "D"];
 
     /**
      * @var int
diff --git a/src/AppBundle/Service/PeriodService.php b/src/AppBundle/Service/PeriodService.php
index 1e2e2ead4..9a851e284 100644
--- a/src/AppBundle/Service/PeriodService.php
+++ b/src/AppBundle/Service/PeriodService.php
@@ -2,14 +2,21 @@
 
 namespace AppBundle\Service;
 
+use AppBundle\Entity\Period;
+
 class PeriodService
 {
     public function __construct()
     {
     }
 
+    public function getDaysOfWeekArray()
+    {
+        return Period::DAYS_OF_WEEK;
+    }
+
     public function getWeekCycleArray()
     {
-        return ["A", "B", "C", "D"];
+        return Period::WEEK_CYCLE;
     }
 }