Gotcha, here in the US most people will take off that week, but no business would ever shut down entirely for a week. You'd piss off all of your customers and associates. (Which is why American workers hate dealing with ones in the EU, they're always on vacation!)
Whoever doesn't stay home during the Christmas period in the US gets accolades from management, so there's incentive to work if you're career-focused.
24 hours in a day, 7 days in a week, 52 weeks in a year.