diff --git a/admin/write-js.php b/admin/write-js.php
index 876d9a80..cd08a418 100644
--- a/admin/write-js.php
+++ b/admin/write-js.php
@@ -30,6 +30,7 @@ $(document).ready(function() {
         secondText      :   '<?php _e('秒'); ?>',
 
         dateFormat      :   'yy-mm-dd',
+        timezone        :   <?php $options->timezone(); ?> / 60,
         hour            :   (new Date()).getHours(),
         minute          :   (new Date()).getMinutes()
     });