Columbus Day, the second Monday in October, is one of the most inconsistently celebrated U.S. holidays. It’s one of 11 official federal holidays, which means federal workers get a paid day off and there’s no mail delivery. Because federal offices will be closed, so will most banks and the bond markets that trade in U.S. government debt. The stock markets will remain open, however, as will most retailers and other businesses.

Beyond that, Columbus Day seems to be fading as a widely observed holiday, having come under fire in recent decades from Native American advocates and others, who’ve argued that Christopher Columbus isn’t an appropriate person to celebrate. Only 16 states and the territory of American Samoa still observe the second Monday in October as an official public holiday exclusively called Columbus Day.