It doesn't matter. Everywhere in the civilized business world Jan 1 is a day off and often Jan 2 is as well. Why is someone working on Jan 1 or 2?
No.
[0] https://www.opm.gov/policy-data-oversight/pay-leave/federal-...
Maybe somewhere with a different calendar entrenched might not care so much about Jan 1 though.
https://www.opm.gov/policy-data-oversight/pay-leave/federal-...
It is a 2 week period where fuck all tends to get dome because somebody, somewhere is on PTO or otherwise unavailable.