Index: public/javascripts/application.js
===================================================================
--- public/javascripts/application.js	(revision 17303)
+++ public/javascripts/application.js	(working copy)
@@ -836,7 +836,7 @@
     if (nativeDateInputSupported) {
       return this;
     } else {
-      return this.datepicker( options );
+      return this.datepicker.apply( this, Array.from(arguments) );
     }
   };
 }( jQuery ));