We have a partnership with StockMarketClock.com, and we get data for trading hours and market holidays for our supported exchanges from this source. We recommend this API as a reliable data source for exchange trading hours and market holidays.
StockMarketClock.com is created and maintained by Reed Technology Solutions. The mission is to provide timely stock market information to traders around the world. The key to success in the markets is having the right information at the right time. The company works closely with a number of stock exchanges to ensure the most up-to-date market information is always available.