diff --git a/public/js/main.js b/public/js/main.js
index dc3a257..7417d49 100644
--- a/public/js/main.js
+++ b/public/js/main.js
@@ -200,14 +200,18 @@ const app = new Vue({
 
         total_days: function(){
             if(this.journey_data.main.length==0) return 0;
-            return (this.journey_data.main[this.journey_data.main.length-1].dateRange[0]-this.journey_data.main[0].dateRange[0])/(1000*60*60*24)
+            try{
+                return (this.journey_data.main[this.journey_data.main.length-1].dateRange[0]-this.journey_data.main[0].dateRange[0])/(1000*60*60*24)
+            }catch{
+                return '?'
+            }
         },
         total_date: function(){
             if(this.journey_data.main.length==0) return '';
             try{
                 return `${this.format_date(this.journey_data.main[0].dateRange[0])} - ${this.format_date(this.journey_data.main[this.journey_data.main.length-1].dateRange[0])}`;
             }catch{
-                return '';
+                return '?';
             }
         },
         update_date: function(idx){