U.S. stock markets, including Nasdaq and the New York Stock Exchange, will be closed Monday, Sept. 7, for Labor Day and reopen Tuesday, Sept. 8. The U.S. bond market will also close, according to the Securities Industry and Financial Markets Association. The U.S. Department of Labor says the holiday honors the social and economic achievements of American workers. Labor Day began with a Sept. 5, 1882, celebration in New York City and became a national holiday in 1894. The next scheduled stock-market closure is Thanksgiving on Thursday, Nov. 26, followed by Christmas on Friday, Dec. 25.