correct date format in admin

src/Bundle/ChillMainBundle/Resources/views/NewsItem/index.html.twig

@@ -11,9 +11,9 @@
             {% for entity in entities %}
                 <tr>
                     <td>{{ entity.title }}</td>
-                    <td>{{ entity.startDate|date }}</td>
+                    <td>{{ entity.startDate|format_date('long') }}</td>
                     {% if entity.endDate is not null %}
-                        <td>{{ entity.endDate|date }}</td>
+                        <td>{{ entity.endDate|format_date('long') }}</td>
                     {% else %}
                         <td>{{ 'news.noDate'|trans }}</td>
                     {% endif %}