This means no sales, no themed merchandise, no decorations. December 25 and most other day are treated just like any other day for all stores malls, restaurants, ect.
You’d still get non religious holiday events like mothers days, or independence days.
What whould change?
Without the “on the seventh day, he rested” adage, I would not get days off. I had this pulled on me by religious bosses to force me to give up my only day off. They rejoiced when I found God.
I will never work for religious nuts again.