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?
It’s so weird when people refer to Christmas as religious holidays. Like, I know its Christianity origins, but Christians just stole it from pagans, gave it a different name and called it their own.
I live in an atheist country and everyone celebrates Christmas, just without all the religious bullshit.
What atheist country do you live in?
Czechia.