diff --git a/index.php b/index.php
index 5975c66..3351353 100644
--- a/index.php
+++ b/index.php
@@ -1,4 +1,9 @@
 <?php
-  header('Cache-Control: max-age=20, stale-while-revalidate=80');
-  sleep(10);
-  print('This is a slow test.');
\ No newline at end of file
+header('Cache-Control: max-age=20, stale-while-revalidate=80');
+sleep(10);
+print('This is a slow test. ' . date('Y-m-d H:i:s'));
+?>
+<p id="js-date"></p>
+<script type="text/javascript">
+  document.getElementById('js-date').innerText(new Date().toISOString());
+</script>
\ No newline at end of file