def interval64_pack(m_d_timetup, qll_pack=qll_pack, mktime64=mktime64):
    """
	Given a triple, (month, day, (seconds, microseconds)), return the serialized
	data using a quad-word for the (seconds, microseconds) tuple.
	"""
    month, day, timetup = m_d_timetup
    return qll_pack((mktime64(timetup), day, month))
