Jan. 20 is Martin Luther King Jr. Day in the United States. Here's what's open and closed during the national holiday.

Jan. 20 is Martin Luther King Jr. Day in the United States. Here's what's open and closed during the national holiday.

Costco members can turn their everyday spending on gas, travel and dining out into rich rewards at the wholesale club, but you won't get big discounts at the store itself. Costco loyalists can ...