diff --git a/helper.go b/helper.go
index 7e0bc13..92d8e8b 100755
--- a/helper.go
+++ b/helper.go
@@ -103,9 +103,6 @@ func format2layout(format string) string {
 // gets a Location instance by a timezone string.
 // 通过时区获取 Location 实例
 func getLocationByTimezone(timezone string) (*time.Location, error) {
-	if timezone == "" {
-		timezone = defaultTimezone
-	}
 	loc, err := time.LoadLocation(timezone)
 	if err != nil {
 		err = invalidTimezoneError(timezone)