Am I Entitled to a Holiday When My Client's Office Closes but Mine Stays Open?

Hello, I have one query. I am an external employee who has been posted in the client's office. My query is: if there is a holiday on the client-side calendar and the office is closed (while in my company's calendar there is no holiday), am I also entitled to a holiday/off day? Please help me understand what the HR policy or laws say about this.

Thank you in advance.

The companies (both) referred to here are multinational, but the office is in India. I am currently posted in India and referring to the Christmas holiday.

Addressing Holidays for External Employees in Client Offices

Once the client office is shut, you need to follow suit, and you would also get the day off. As this is a recurrent problem, suggest that as and when the client establishment declares an annual holiday, you have to take it up with your principal to get those days off. Republic Day, Independence Day, and Gandhi Jayanti have to be compulsory holidays in India, which the principal may not be observing. So you have to properly address this issue.