diff --git a/src/Hackspace/Bundle/CalciferBundle/Controller/RepeatingEventController.php b/src/Hackspace/Bundle/CalciferBundle/Controller/RepeatingEventController.php
index 18b22e6..28b1341 100755
--- a/src/Hackspace/Bundle/CalciferBundle/Controller/RepeatingEventController.php
+++ b/src/Hackspace/Bundle/CalciferBundle/Controller/RepeatingEventController.php
@@ -75,7 +75,8 @@ class RepeatingEventController extends Controller
     {
         $entity = new RepeatingEvent();
         $this->fillEntity($request, $entity);
-        if ($this->validateRepeatingEvent($entity)) {
+        $errors = $entity->isValid();
+        if (count($errors) == 0) {
             $ret = $this->saveRepeatingEvent($request, $entity);
             if ($entity->id > 0) {
                 return $this->redirect($this->generateUrl('repeating_event_show'));
@@ -85,6 +86,7 @@ class RepeatingEventController extends Controller
         }
         return [
             'entity' => $entity,
+            'errors' => $errors,
         ];
 
     }
@@ -139,7 +141,8 @@ class RepeatingEventController extends Controller
         }
 
         $this->fillEntity($request, $entity);
-        if ($this->validateRepeatingEvent($entity)) {
+        $errors = $entity->isValid();
+        if (count($errors) == 0) {
             $ret = $this->saveRepeatingEvent($request, $entity);
             if ($entity->id > 0) {
                 return $this->redirect($this->generateUrl('repeating_event_show'));
@@ -149,6 +152,7 @@ class RepeatingEventController extends Controller
         }
         return [
             'entity' => $entity,
+            'errors' => $errors,
         ];
     }
 
@@ -172,20 +176,6 @@ class RepeatingEventController extends Controller
 
     }
 
-    private function validateRepeatingEvent(RepeatingEvent $entity)
-    {
-        $fields = [
-            'nextdate',
-            'repeating_pattern',
-            'summary',
-        ];
-        foreach ($fields as $field) {
-            if ((is_null($entity->$field)) && (strlen($entity->$field) > 0))
-                return false;
-        }
-        return true;
-    }
-
     private function saveRepeatingEvent(Request $request, RepeatingEvent $entity)
     {
         $location = $request->get('location');
diff --git a/src/Hackspace/Bundle/CalciferBundle/Entity/RepeatingEvent.php b/src/Hackspace/Bundle/CalciferBundle/Entity/RepeatingEvent.php
index a9ff31c..d2f867a 100755
--- a/src/Hackspace/Bundle/CalciferBundle/Entity/RepeatingEvent.php
+++ b/src/Hackspace/Bundle/CalciferBundle/Entity/RepeatingEvent.php
@@ -4,6 +4,7 @@ namespace Hackspace\Bundle\CalciferBundle\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
 use Doctrine\ORM\PersistentCollection;
+use enko\RelativeDateParser\RelativeDateParser;
 
 /**
  * RepeatEvent
@@ -84,4 +85,25 @@ class RepeatingEvent extends BaseEntity
      *      )
      */
     protected $tags = [];
+
+    public function isValid() {
+        $errors = [];
+        if ((is_null($this->nextdate)) && (strlen($this->nextdate) > 0)) {
+            $errors['nextdate'] = "Bitte gebe einen nächsten Termin an.";
+        }
+        if ((is_null($this->repeating_pattern)) && (strlen($this->repeating_pattern) > 0)) {
+            $errors['repeating_pattern'] = "Bitte gebe ein gültiges Wiederholungsmuster an.";
+        } else {
+            $this->nextdate->setTimezone(new \DateTimeZone('Europe/Berlin'));
+            try {
+                $parser = new RelativeDateParser($this->repeating_pattern,$this->nextdate,'de');
+            } catch (\Exception $e) {
+                $errors['repeating_pattern'] = "Bitte gebe ein gültiges Wiederholungsmuster an.";
+            }
+        }
+        if ((is_null($this->summary)) && (strlen($this->summary) > 0)) {
+            $errors['summary'] = "Bitte gebe eine Zusammenfassung an.";
+        }
+        return $errors;
+    }
 }
\ No newline at end of file
diff --git a/src/Hackspace/Bundle/CalciferBundle/Resources/views/RepeatingEvent/repeating_event_form.html.twig b/src/Hackspace/Bundle/CalciferBundle/Resources/views/RepeatingEvent/repeating_event_form.html.twig
index 0bd20f3..f258b28 100755
--- a/src/Hackspace/Bundle/CalciferBundle/Resources/views/RepeatingEvent/repeating_event_form.html.twig
+++ b/src/Hackspace/Bundle/CalciferBundle/Resources/views/RepeatingEvent/repeating_event_form.html.twig
@@ -1,6 +1,6 @@
 <form class="ui form" method="post"
       action="{% if entity.id|default(0) > 0 %}{{ path('repeating_event_update',{'slug':entity.slug}) }}{% else %}{{ path('repeating_event_create') }}{% endif %}">
-        <div class="required field">
+        <div class="required field{% if(errors|default('0') != 0) %} {% if('nextdate' in errors|keys) %}error{% endif %}{% endif %}">
             <label for="event_startdate">Nächster Termin</label>
 
             <div class="ui icon input">
@@ -11,7 +11,9 @@
                        value="{{ entity.nextdate.format('Y-m-d H:i')|default('') }}"
                        placeholder="{{ "now"|date('d.m.Y H:00') }}"
                        class="form-control">
-
+                {% if(errors|default('0') != 0) %} {% if('nextdate' in errors|keys) %}
+                    <div class="ui red pointing above ui label">{{ errors.nextdate }}</div>
+                {% endif %}{% endif %}
                 <i class="icon calendar"></i>
 
             </div>
@@ -37,7 +39,7 @@
             </div>
         </div>
 
-        <div class="required field">
+        <div class="required field{% if(errors|default('0') != 0) %} {% if('repeating_pattern' in errors|keys) %}error{% endif %}{% endif %}">
             <label for="event_duration">Terminwiederholungsmuster</label>
 
             <div class="ui input">
@@ -48,6 +50,9 @@
                        required="required"
                        maxlength="255"
                        class="form-control">
+                {% if(errors|default('0') != 0) %} {% if('repeating_pattern' in errors|keys) %}
+                    <div class="ui red pointing above ui label">{{ errors.repeating_pattern }}</div>
+                {% endif %}{% endif %}
             </div>
 
             <div class="ui label">
@@ -56,7 +61,7 @@
 
         </div>
 
-        <div class="required field">
+        <div class="required field{% if(errors|default('0') != 0) %} {% if('summary' in errors|keys) %}error{% endif %}{% endif %}">
             <label for="event_summary">Zusammenfassung</label>
 
             <div class="ui input">
@@ -67,6 +72,9 @@
                        required="required"
                        maxlength="255"
                        class="form-control">
+                {% if(errors|default('0') != 0) %} {% if('summary' in errors|keys) %}
+                    <div class="ui red pointing above ui label">{{ errors.summary }}</div>
+                {% endif %}{% endif %}
             </div>
         </div>