Tomorrow is Christmas Day and a lot of people have it off from work, even if they don't celebrate Christmas, lots of people have the day off. I'm lucky and I also have the day off though I had to work today and I'll be working on Friday.
But there are lots of people who have to work tomorrow. My company is open to provide tech support - from what I hear it will be a lot of asking for wireless information for new stuff.
Some restaurants / fast food joints will be open as well as gas stations for those traveling.
Hospital, police and fire departments don't close either. They will be there to help people in need, even saving lives.
There are probably other places open, which means people do work. I'm thankful for those who do work. I'm especially thankful to those who volunteer at my company so I don't have work.
Have a Merry Christmas and Happy Holidays!