To change a timestamp to a custom format you need to use the `date.formatter` service.
For e.g.
$custom_date_format = \Drupal::service('date.formatter')->format($timestamp, 'custom', 'd/m/Y')
// This would print 15/04/2024
Neat little code snippet to get the full URL of any Drupal (v8 & v9) page.
By now your Drupal site should be on the latest version of Drupal 9. If it's not, and you don't know how to upgrade your site from your previous version to Drupal 9, use the contact page to get in touch and I'll see how I can best help you out.
Every now and then we find ourselves needing to make a big update to entities within our sites. We could write code and run this using our browser using the Batch API, however, if it's just a one-off, then using the hook_update_N would suffice.