diff --git a/util.js b/util.js
index f68a4aa..1db237b 100644
--- a/util.js
+++ b/util.js
@@ -33,7 +33,10 @@ exports.getServiceByHost = (host, service="") => {
 exports.getTimezone = ctx => {
     if (ctx.header['x-client-timezone'] !== undefined)
         return ctx.header['x-client-timezone'];
+    else
+        return "UTC";
 };
+
 exports.formats = formats;
 exports.datetime = datetime;