It should most definitely cancel services on 1 Janaury- New Years Day. Why? So that your hungover families can gather around the porcelein and share the time expelling the evening before’s extravagencies.
You don’t want to inconvenience those families. You want them to come back, sometime, don’t you? You don’t want to alienate them, do you?
Cancel your services. You’ve done it for lesser reasons….