1. Frum schools usually hold classes in this period.
2. In the USA, Jan. 1 is not a problem since its closing is purely secular (in some countries, it was a religious holiday, being the anniversary of the alleged “you know who” have a bris on that day – but not in the USA.
3. I try to never wear a suit and tie on Sunday or Dec. 25, so people will realize I’m not honoring their yuntuf.