diff --git a/app/javascript/application.js b/app/javascript/application.js
--- a/app/javascript/application.js
+++ b/app/javascript/application.js
@@ -45,6 +45,8 @@
 
 import "select2"
 import "chart"
+import { TempusDominus } from "@eonasdan/tempus-dominus"
+window.TempusDominus = TempusDominus
 
 //my own customization
 import 'custom'