view/common/block-layout/list-of-sites.phtml

@@ -19,6 +19,9 @@ foreach($sites as $site){
   if (!isset($site_data['currator'])) {
     $site_data['currator'] = "";
   }
+  if (isset($site_data['project_date'])) {
+    $site_data['project_date'] = substr($site_data['project_date'], 0, 4);
+  }
   array_push($projects, $site_data);
 }
 //$collections = json_encode($collections, JSON_UNESCAPED_SLASHES);

view/common/site-list-entry.phtml

@@ -22,7 +22,7 @@ $summary = $showSummary ? $site->summary() : null;
       </li>
       <li class="date">
         <?php if ($site_meta_values != null): ?>
-          <?= substr($site_meta_values['project_date'], 0, 4); ?>
+          <?= $site_meta_values['project_date']; ?>
         <?php endif; ?>
       </li>
     </ul>