No. There is nothing in California law that directs that an employer must close its business on any particular day. It is up to the employer to select which days it chooses to be open or closed for business. If your employer is open on a holiday, like Christmas of New Years, and schedules you to work that day, there is nothing in the law that obligates your employer to pay you anything but your regular pay and any overtime premium for all overtime hours worked.
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