diff --git a/goben/chart.go b/goben/chart.go
index b5ce2ae..5612c1d 100644
--- a/goben/chart.go
+++ b/goben/chart.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"os"
 	"time"
@@ -36,11 +35,6 @@ func chartRender(filename string, input *ChartData, output *ChartData) error {
 				Show: true, //enables / displays the x-axis
 			},
 			TickPosition: chart.TickPositionBetweenTicks,
-			ValueFormatter: func(v interface{}) string {
-				typed := v.(float64)
-				typedDate := util.Time.FromFloat64(typed)
-				return fmt.Sprintf("%02d:%02d:%02d", typedDate.Hour(), typedDate.Minute(), typedDate.Second())
-			},
 		},
 		YAxis: chart.YAxis{
 			Name: "Mbps",
@@ -54,12 +48,12 @@ func chartRender(filename string, input *ChartData, output *ChartData) error {
 			},
 		},
 		Series: []chart.Series{
-			chart.ContinuousSeries{
+			chart.TimeSeries{
 				Name:    "Input",
 				XValues: input.XValues,
 				YValues: input.YValues,
 			},
-			chart.ContinuousSeries{
+			chart.TimeSeries{
 				Name:    "Output",
 				YAxis:   chart.YAxisSecondary,
 				XValues: output.XValues,
diff --git a/goben/client.go b/goben/client.go
index db4f375..1e44827 100644
--- a/goben/client.go
+++ b/goben/client.go
@@ -181,7 +181,7 @@ type account struct {
 
 // ChartData records data for chart
 type ChartData struct {
-	XValues []float64
+	XValues []time.Time
 	YValues []float64
 }
 
@@ -204,7 +204,7 @@ func (a *account) update(n int, reportInterval time.Duration, conn, label, cpsLa
 
 		// save chart data
 		if stat != nil {
-			stat.XValues = append(stat.XValues, chartTime(now))
+			stat.XValues = append(stat.XValues, now)
 			stat.YValues = append(stat.YValues, mbps)
 		}
 	}
diff --git a/goben/csv.go b/goben/csv.go
index 911ed66..eeb93fe 100644
--- a/goben/csv.go
+++ b/goben/csv.go
@@ -30,7 +30,7 @@ func exportCsv(filename string, info *ExportInfo) error {
 
 	entry[Dir] = "input"
 	for i, x := range info.Input.XValues {
-		entry[Time] = timeFromFloat(x).String()
+		entry[Time] = x.String()
 		entry[Rate] = fmt.Sprintf("%v", info.Input.YValues[i])
 		if err := w.Write(entry); err != nil {
 			return err
@@ -39,7 +39,7 @@ func exportCsv(filename string, info *ExportInfo) error {
 
 	entry[Dir] = "output"
 	for i, x := range info.Output.XValues {
-		entry[Time] = timeFromFloat(x).String()
+		entry[Time] = x.String()
 		entry[Rate] = fmt.Sprintf("%v", info.Output.YValues[i])
 		if err := w.Write(entry); err != nil {
 			return err