Employees and Religious Holidays?

You just basically answered your own question. We have legal holidays established by the Federal and the State government. Anything additional is company by company policy. You said your employee is a good worker then accommodate him but do let him know that it's a favor to him and it is granted on a case by case basis. His request should be noted that it will depend on the work loads and other people vacation plans. You don't want him to think that it is going to be the norm when it comes to his requests. Perhaps you should grant some days off and not some to break the trend; but do explain to him that he is needed and do appreciate his contributions. Seems like you already know how to handle him anyway.