The National Stock Exchange NSE and the Bombay Stock Exchange BSE closed on Saturday and Sunday will resume their normal business hours on Monday.
If there are any occasions they will close on that the day also according to the country festival not on global occasions but on Christmas global stock exchanges are closed.
Monday to Friday Indian markets are open and the equity market trading hour is 9:15 am to 3:30 pm. You can visit on NSE stock exchange website for holiday calendar.
Trading holiday in india