Non-weekend days when the New York Stock Exchange or Nasdaq are closed.
Stock markets are closed on festivals like Thanksgiving, Christmas.
Bond markets are closed or close early on some holidays.
Markets were closed in 2018 in honor of former President George H.W. Bush.
If the holiday falls on Saturday, the market is closed on the previous Friday.
If the holiday falls on Sunday, the market is closed on Monday.
New York Stock Exchange and Nasdaq: Monday through Friday, 9:30 a.m. to 4 p.m.