diff --git a/modules/opd_presentations/src/Date.php b/modules/opd_presentations/src/Date.php
new file mode 100644
index 000000000..794a09158
--- /dev/null
+++ b/modules/opd_presentations/src/Date.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opd_presentations;
+
+readonly final class Date {
+
+  public function toTimestamp(): int {
+    return $this->date->getTimestamp();
+  }
+
+  public static function fromString(string $date): self {
+    return new self(new \DateTimeImmutable($date));
+  }
+
+  private function __construct(private \DateTimeImmutable $date) {
+  }
+
+}
diff --git a/modules/opd_presentations/tests/src/Functional/PresentationTest.php b/modules/opd_presentations/tests/src/Functional/PresentationTest.php
index bd727fb56..06f10dcb6 100644
--- a/modules/opd_presentations/tests/src/Functional/PresentationTest.php
+++ b/modules/opd_presentations/tests/src/Functional/PresentationTest.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Drupal\opd_presentations\Functional;
 
 use Drupal\Tests\opd_presentations\Traits\PresentationCreationTrait;
+use Drupal\opd_presentations\Date;
 use weitzman\DrupalTestTraits\ExistingSiteBase;
 
 final class PresentationTest extends ExistingSiteBase {
@@ -15,17 +16,17 @@ final class PresentationTest extends ExistingSiteBase {
     $presentation = $this->createPresentation(
       events: [
         $this->createEvent(
-          eventDate: 'now',
+          eventDate: Date::fromString('now'),
           eventName: 'PHP South West',
         ),
 
         $this->createEvent(
-          eventDate: 'yesterday',
+          eventDate: Date::fromString('yesterday'),
           eventName: 'DrupalCon Lille',
         ),
 
         $this->createEvent(
-          eventDate: 'tomorrow',
+          eventDate: Date::fromString('tomorrow'),
           eventName: 'PHP Oxford',
         ),
       ],
diff --git a/modules/opd_presentations/tests/src/Traits/PresentationCreationTrait.php b/modules/opd_presentations/tests/src/Traits/PresentationCreationTrait.php
index 67f554f79..16530e5ab 100644
--- a/modules/opd_presentations/tests/src/Traits/PresentationCreationTrait.php
+++ b/modules/opd_presentations/tests/src/Traits/PresentationCreationTrait.php
@@ -7,6 +7,7 @@ namespace Drupal\Tests\opd_presentations\Traits;
 use Drupal\Core\Datetime\DrupalDateTime;
 use Drupal\Tests\node\Traits\NodeCreationTrait;
 use Drupal\ctools\Testing\EntityCreationTrait;
+use Drupal\opd_presentations\Date;
 use Drupal\opd_presentations\Event;
 use Drupal\opd_presentations\Presentation;
 
@@ -29,11 +30,11 @@ trait PresentationCreationTrait {
     return $presentation;
   }
 
-  private function createEvent(string $eventName, string $eventDate): Event {
+  private function createEvent(string $eventName, Date $eventDate): Event {
     $event = $this->createEntity(
       entity_type: 'paragraph',
       values: [
-        'field_date' => (new DrupalDateTime($eventDate))->getTimestamp(),
+        'field_date' => $eventDate->toTimestamp(),
         'field_event_name' => $eventName,
         'type' => Event::PARAGRAPH_TYPE,
       ],