diff --git a/src/Dto/Output/RemoteCalendarOutput.php b/src/Dto/Output/RemoteCalendarOutput.php
index 807dbc8..97b260c 100644
--- a/src/Dto/Output/RemoteCalendarOutput.php
+++ b/src/Dto/Output/RemoteCalendarOutput.php
@@ -19,6 +19,9 @@ final class RemoteCalendarOutput extends AbstractOutput
     #[Groups(['remote-calendar:read'])]
     public array $remoteCalendarRules = [];
 
+    #[Groups(['remote-calendar:read'])]
+    public ?\DateTimeInterface $createdAt = null;
+
     public function __construct(RemoteCalendar $remoteCalendar)
     {
         parent::__construct($remoteCalendar);
@@ -28,5 +31,7 @@ final class RemoteCalendarOutput extends AbstractOutput
         $this->remoteCalendarRules = $remoteCalendar->getRules()->map(
             fn(RemoteCalendarRule $rule) => new RemoteCalendarRuleOutput($rule)
         )->toArray();
+
+        $this->createdAt = $remoteCalendar->getCreatedAt();
     }
 }
\ No newline at end of file