For me, I don't think it's fair to make an employee work during holidays. I think it should be voluntary - if you want to come to work, you can, but if you don't, you can stay home and celebrate with your family and friends.
Giving employees official holidays during their festive seasons should be part of their benefit package. I say "their festive seasons" because Christians may want to celebrate Christmas, Muslims may want to celebrate Eid al-Fitr, and Hindus may want to celebrate Diwali.
This is also a way to promote diversity in the workplace. If Christians take Christmas off, Muslims and Hindus can work, and then when Muslims take Eid off, Christians and Hindus can work. This way, you can regulate your workforce and give employees the freedom to celebrate their holidays.
By doing this, you prioritize employees' satisfaction and well-being. This is why people don't leave jobs, they leave toxic work environments. When you make people feel comfortable and loved, they will stay, and it will increase productivity and mutual respect.
Closing offices during holidays for like two weeks might affect business revenue, but how much?
You've been working from January to December, you should have sustainable investments and is it worth making employees miss out on time with their families and friends? I don't think so.
But what do you think about making someone's work mandatory during holidays?
I think it entirely depends on your job. There’s going to be jobs where it’s necessary and when you took that job that was something that you would’ve known from the very beginning. For instance, if you work at a gas station, then you must know that if you do, you’re gonna have to work during some holiday holidays because people need gas at all times, so it really just depends. I am lucky enough where I get a limited vacation and don’t have to work through holidays, but yes, I do think more people in some situations should get more time off.