diff --git a/public/echarts_timelinemap_controller.js b/public/echarts_timelinemap_controller.js
index 80a9b39..fed861e 100644
--- a/public/echarts_timelinemap_controller.js
+++ b/public/echarts_timelinemap_controller.js
@@ -102,7 +102,7 @@ module.controller('EchartsTimelineMapController', function ($scope, $element, $r
                 avg_speed = row[3];
                 avg_speed=avg_speed.toFixed(2);
 
-                if(all.dates.indexOf(datestr)===-1){
+                if(all.dates.indexOf(getdateformat(datestr))===-1){
                     all.dates.push(getdateformat(datestr));
                     all.options.push(
                   {