Don't need to execute that JS every time

index.php

···
     &copy; <?= date('Y') ?> Kody - Made with 🍮<br/>
     <a href="https://thenounproject.com/icon/wall-clock-5456766/" target="_blank" title="Wall Clock Icon" rel="noopener">Wall Clock by Basicon</a> from Noun Project (CC BY 3.0)
   </footer>
+<?php if ($_COOKIE['has-js'] !== '1') { ?>
 
   <script>
     // Save on the document size if user has JavaScript
···
     date.setTime(date.getTime() + (1000 * 60 * 60 * 24 * 365))
     document.cookie = 'has-js=1; expires=' + date.toUTCString() + '; path=/'
   </script>
+<?php } ?>
 </body>
 </html>