Business days in the United States
US business days are usually Monday to Friday, minus the federal holidays set by 5 U.S.C. 6103: New Year's Day, the Birthday of Martin Luther King, Jr., Washington's Birthday, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day and Christmas Day. When one falls on a Saturday, federal workers take the Friday before; on a Sunday, the Monday after. This calculator uses those observed dates.
Banks, couriers and state offices may close on other days too (for example the day after Thanksgiving, or a state holiday). Add those as your own days off under Options.
Shipping times such as "3 to 5 business days"
Pick Add or subtract days, type 5, choose the order date and read the latest arrival date. Couriers usually do not count the order day itself, and weekend deliveries are not promised.