diff --git a/npm/packs/core/src/abp.js b/npm/packs/core/src/abp.js
index ac050351e1..8d11ad1fec 100644
--- a/npm/packs/core/src/abp.js
+++ b/npm/packs/core/src/abp.js
@@ -753,7 +753,7 @@ var abp = abp || {};
     }
 
     abp.clock.timeZone = function () {
-        return abp.setting.get('Abp.Timing.TimeZone');
+        return abp.setting.get('Abp.Timing.TimeZone') || abp.clock.browserTimeZone();
     }
 
     // Normalize Date object or date string to standard string format that will be sent to server