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?
Most of the people you’re thinking about as a problem haven’t read the Bible either. They’d think the stuff Jesus said was commie, bleeding-heart, socialist stuff (because it is)