diff --git a/metric_tank/helper.go b/metric_tank/helper.go
index <HASH>..<HASH> 100644
--- a/metric_tank/helper.go
+++ b/metric_tank/helper.go
@@ -8,9 +8,9 @@ import (
 func TS(ts interface{}) string {
 	switch t := ts.(type) {
 	case int64:
-		return time.Unix(t, 0).Format("15:04:05")
+		return time.Unix(t, 0).Format("02 15:04:05")
 	case uint32:
-		return time.Unix(int64(t), 0).Format("15:04:05")
+		return time.Unix(int64(t), 0).Format("02 15:04:05")
 	default:
 		return fmt.Sprintf("unexpected type %T\n", ts)
 	}
add day again to ts output for clarity