diff --git a/frontend/src/utils/date-format-utils.js b/frontend/src/utils/date-format-utils.js
index 6db7aa8a80..719e27a279 100644
--- a/frontend/src/utils/date-format-utils.js
+++ b/frontend/src/utils/date-format-utils.js
@@ -12,7 +12,7 @@ function translateCalendar() {
   const locale = window.app.config ?  window.app.config.lang : 'en';
   let language;
   switch (locale) {
-    case 'zh-CH':
+    case 'zh-cn':
       language = zhCN;
       break;
     case 'zh-tw':