diff --git a/npm/packs/core/src/abp.js b/npm/packs/core/src/abp.js
index 41837d2368..f8cdf1ea2c 100644
--- a/npm/packs/core/src/abp.js
+++ b/npm/packs/core/src/abp.js
@@ -717,7 +717,7 @@ var abp = abp || {};
     };
 
     var toUtc = function (date) {
-        Date.UTC(
+        return Date.UTC(
             date.getUTCFullYear(),
             date.getUTCMonth(),
             date.getUTCDate(),