rmode := minio.RetentionMode(mode)
		putOpts.Mode = rmode
	}
	if retainDateStr, ok := lkMap.Lookup(xhttp.AmzObjectLockRetainUntilDate); ok {
		rdate, err := amztime.ISO8601Parse(retainDateStr)
		if err != nil {
			return putOpts, false, err
		}
		putOpts.RetainUntilDate = rdate
		// set retention timestamp in opts
		retTimestamp := objInfo.ModTime