diff --git a/cron_example/cron_example.module b/cron_example/cron_example.module
index 0112247..bfb3413 100644
--- a/cron_example/cron_example.module
+++ b/cron_example/cron_example.module
@@ -37,7 +37,7 @@ function cron_example_cron() {
   // We usually don't want to act every time cron runs (which could be every
   // minute) so keep a time for the next run in the site state.
   $next_execution = \Drupal::state()->get('cron_example.next_execution', 0);
-  if (REQUEST_TIME >= $next_execution) {
+  if (\Drupal::time()->getRequestTime()>= $next_execution) {
     // This is a silly example of a cron job.
     // It just makes it obvious that the job has run without
     // making any changes to your database.
@@ -46,7 +46,7 @@ function cron_example_cron() {
       \Drupal::messenger()->addMessage(t('cron_example executed at %time', ['%time' => date('c')]));
       \Drupal::state()->set('cron_example_show_status_message', FALSE);
     }
-    \Drupal::state()->set('cron_example.next_execution', REQUEST_TIME + $interval);
+    \Drupal::state()->set('cron_example.next_execution',  \Drupal::time()->getRequestTime() + $interval);
   }
 }
 
diff --git a/cron_example/src/Form/CronExampleForm.php b/cron_example/src/Form/CronExampleForm.php
index b93c609..6a22cc7 100644
--- a/cron_example/src/Form/CronExampleForm.php
+++ b/cron_example/src/Form/CronExampleForm.php
@@ -95,11 +95,11 @@ class CronExampleForm extends ConfigFormBase {
     ];
 
     $next_execution = $this->state->get('cron_example.next_execution');
-    $next_execution = !empty($next_execution) ? $next_execution : REQUEST_TIME;
+    $next_execution = !empty($next_execution) ? $next_execution : \Drupal::time()->getRequestTime();
 
     $args = [
       '%time' => date('c', $this->state->get('cron_example.next_execution')),
-      '%seconds' => $next_execution - REQUEST_TIME,
+      '%seconds' => $next_execution - \Drupal::time()->getRequestTime(),
     ];
     $form['status']['last'] = [
       '#type' => 'item',
@@ -222,7 +222,7 @@ class CronExampleForm extends ConfigFormBase {
       // Create a new item, a new data object, which is passed to the
       // QueueWorker's processItem() method.
       $item = new \stdClass();
-      $item->created = REQUEST_TIME;
+      $item->created = \Drupal::time()->getRequestTime();
       $item->sequence = $i;
       $queue->createItem($item);
     }
diff --git a/render_example/src/Controller/RenderExampleController.php b/render_example/src/Controller/RenderExampleController.php
index 04bca2d..effbfe5 100644
--- a/render_example/src/Controller/RenderExampleController.php
+++ b/render_example/src/Controller/RenderExampleController.php
@@ -487,7 +487,7 @@ class RenderExampleController extends ControllerBase {
     $build = [
       'lazy_builder_time' => [
         '#markup' => '<p>' . \Drupal::translation()->translate('The current time is @time', [
-          '@time' => \Drupal::service('date.formatter')->format(REQUEST_TIME, 'long'),
+          '@time' => \Drupal::service('date.formatter')->format(\Drupal::time()->getRequestTime(), 'long'),
         ]) . '</p>',
       ],
     ];