diff --git a/time.go b/time.go
index 0510648..5358ac9 100644
--- a/time.go
+++ b/time.go
@@ -7,16 +7,16 @@ var GMT8 = time.FixedZone("CST", 8*3600)
 
 // TimeToStr 时间戳格式化为时间字符串
 // 若 timestamp < 0，则使用 `time.Now()`
-func TimeToStr(layout string, timestamp int64) string {
+func TimeToStr(layout string, timestamp int64, loc *time.Location) string {
 	if timestamp < 0 {
 		return time.Now().In(time.Local).Format(layout)
 	}
-	return time.Unix(timestamp, 0).In(time.Local).Format(layout)
+	return time.Unix(timestamp, 0).In(loc).Format(layout)
 }
 
 // StrToTime 时间字符串解析为时间戳
-func StrToTime(layout, datetime string) time.Time {
-	t, _ := time.ParseInLocation(layout, datetime, time.Local)
+func StrToTime(layout, datetime string, loc *time.Location) time.Time {
+	t, _ := time.ParseInLocation(layout, datetime, loc)
 	return t
 }