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): ?>
-          <?= $site_meta_values['project_date']; ?>
+          <?= substr($site_meta_values['project_date'], 0, 4); ?>
         <?php endif; ?>
       </li>
     </ul>