Reg Market Day. The regular schedule for the Toronto Stock Exchange, the Canadian Securities Exchange, the New York Stock Exchange, and the Nasdaq is Monday through Friday from 9:30 a.m. to 4 p.m. Eastern time with weekends off. Markets remain open on New Year’s Eve unless it falls on a weekend. There are also certain closures for stock market holidays. If the holiday falls on a Sunday, it will be observed the following Monday.