diff --git a/flarum/bootstrap.php b/flarum/bootstrap.php
index 698724c..3978c59 100644
--- a/flarum/bootstrap.php
+++ b/flarum/bootstrap.php
@@ -37,6 +37,8 @@ if (file_exists($configFile = __DIR__.'/../config.php')) {
     $app->instance('flarum.config', include $configFile);
 }
 
+date_default_timezone_set('UTC');
+
 $app->instance('config', $config = new ConfigRepository([
     'view' => [
         'paths' => [