diff --git a/main.go b/main.go
index 6cef24f..3099bfe 100644
--- a/main.go
+++ b/main.go
@@ -23,7 +23,7 @@ type CountLiveAnchors struct {
 }
 
 func getArgsStartTime() time.Time {
-	date := flag.Arg(0)
+	date := flag.Arg(1)
 	if date == "" {
 		panic("please input date eg. '2020-11-30 16:29:17'")
 	}