Merge pull request #2148 from kyoshidajp/replace_datetime_strings

Replace invalid date time strings

client/app/filters/datetime.js

@@ -6,9 +6,15 @@ export default function init(ngModule) {
   ngModule.filter('dateTime', clientConfig =>
     function dateTime(value) {
       if (!value) {
-        return '-';
+        return ''; 
       }
-
-      return moment(value).format(clientConfig.dateTimeFormat);
+    
+      const parsed = moment(value);
+    
+      if (!parsed.isValid()) {
+        return '-'; 
+      }
+      
+      return parsed.format(clientConfig.dateTimeFormat);
     });
 }