diff --git a/htdocs/samples/timeseries.html b/htdocs/samples/timeseries.html
index 548fc42..9451724 100644
--- a/htdocs/samples/timeseries.html
+++ b/htdocs/samples/timeseries.html
@@ -11,8 +11,11 @@
       var chart = c3.generate({
         bindto: '#chart',
         data: {
+          x : 'date',
+          x_format : '%Y%m%d',
           columns: [
-            ['x', '2013-01-01', '2013-01-02', '2013-01-03', '2013-01-04', '2013-01-05', '2013-01-06'],
+//            ['x', '2013-01-01', '2013-01-02', '2013-01-03', '2013-01-04', '2013-01-05', '2013-01-06'],
+            ['date', '20130101', '20130102', '20130103', '20130104', '20130105', '20130106'],
             ['sample', 30, 200, 100, 400, 150, 250]
           ]
         },