diff --git a/PatchViewer.php b/PatchViewer.php
index 521437e..4f2ed5c 100644
--- a/PatchViewer.php
+++ b/PatchViewer.php
@@ -3,6 +3,7 @@
 require('PatchObject.php');
 require('Database.php');
 
+date_default_timezone_set('UTC');
 $db = new Database(__DIR__ . '/db.json');
 if (!$db->load()) {
 	exit(1);