diff --git a/src/Yasumi/Holiday.php b/src/Yasumi/Holiday.php
index a6f99c005..273284fb7 100644
--- a/src/Yasumi/Holiday.php
+++ b/src/Yasumi/Holiday.php
@@ -23,7 +23,7 @@
 /**
  * Class Holiday.
  */
-class Holiday extends \DateTime implements \JsonSerializable
+class Holiday extends \DateTime implements \JsonSerializable, \Stringable
 {
     /**
      * Type definition for Official (i.e. National/Federal) holidays.