diff --git a/webapp/bootstrap/init.php b/webapp/bootstrap/init.php
index 44e2d7c4..d61feadc 100644
--- a/webapp/bootstrap/init.php
+++ b/webapp/bootstrap/init.php
@@ -1,6 +1,6 @@
 <?php
 
-ini_set('date.timezone','Asia/Shanghai');
+ini_set('date.timezone','UTC');
 require 'phpcommon/common.php';
 require_once('phpcommon/sqlhelper.php');
 require_once('models/BaseModel.php');