case offset > 0:
		dst = append(dst, '+')
	case offset < 0:
		dst = append(dst, '-')
	}

	offsetMinutes := offset / 60
	if offsetMinutes < 0 {
		offsetMinutes = -offsetMinutes
	}

	dst = appendTwoDigits(dst, offsetMinutes/60)
	dst = appendTwoDigits(dst, offsetMinutes%60)

	return dst
}

func stripTagAndLength(in []byte) []byte {
	_, offset, err := parseTagAndLength(in, 0)