So today most businesses are closed. Much of this practice originates with the pagan and heathen traditions.
Liberal history is fairly distorted but from there we can see that much of the traditions of today are of pagan origin and not of biblical truths.
Some information for this is seen in the
Christ was really born during the feast of tabernacles
More evidence on this site
Even if family members choose to celebrate Christ's birth on this day and call it whatever they may, remember to have Christian grace when approaching them and sharing the truth.