Christmas isn't that important a holiday to me. I like the day off, and it's fun doing presents, but it doesn't have a religious significance nor importance to me. So, I don't mind working on it when it comes up.

When I was a kid, my best friend was from a Nepalese/Tibetan family, and they were all Buddhists. His dad was a bartender and a chef, and he loved working on Christmas and Christmas Eve. The tips were outrageously good. And, of course, with their social background, Christmas was just another day to them.

I see it pretty much the same way these days.

So, one possible solution in some workplaces might be to have people take the holidays that matter to them, and cover for others on the holidays that matter to those. That'll depend on how diverse the workplace team is, of course. Of course, this would have to be managed in such a way that it didn't lead to "workplace religious discrimination" lawsuits.