diff --git a/samples/Sample_Header.php b/samples/Sample_Header.php
index f74067a0..5e5ec0e1 100644
--- a/samples/Sample_Header.php
+++ b/samples/Sample_Header.php
@@ -1,6 +1,6 @@
 <?php
 
-date_default_timezone_set('Europe/Paris');
+date_default_timezone_set('UTC');
 
 /**
  * Header file