The local parish seems to include the memorial prayers after the Liturgy on Sundays, rather than devoting a separate Liturgy on another day just for this purpose. Maybe they don't do that on Christmas after the Liturgy, but there doesn't seem to be anything going on the next day, so who knows.
Related to Christmas, though it is probably better in a separate topic, it seems the local diocese has ordered that, since Christmas is on a Monday, Sunday morning Liturgy be cancelled since it will be celebrated later that day as part of the Christmas Eve services. Is that really traditional Armenian practice? I can't imagine the canceling of Sunday morning Liturgy to be canonical in any way whatsoever barring some major emergency. I remember serving Sunday morning Liturgy, eating breakfast, and then resuming fasting again for a Liturgy later that evening, but canceling the morning Liturgy was always out of the question.