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?
Christmas isn’t a religious holiday. Christmas today has basically nothing to do with the birth of Jesus, just like how Halloween isn’t celebrating the Grim Reaper. It’s just a fun and festive time.
You’re not wrong.