diff --git a/index.php b/index.php
index 234ab84..bed5d93 100644
--- a/index.php
+++ b/index.php
@@ -5,6 +5,11 @@
  * https://github.com/klaussilveira/gitlist
  */
 
+// Set the default timezone for systems without date.timezone set in php.ini
+if (!ini_get('date.timezone')) {
+    date_default_timezone_set('UTC');
+}
+
 require 'vendor/autoload.php';
 $app = require 'boot.php';
 $app->run();
\ No newline at end of file