Costco warehouses will be closed on Labor Day. It's one of the seven holidays each year when locations are closed, according to the company's website .Sam's Club will be open from 8 a.m. to 6 p.m. for Plus members and 10 a.m. to 6 p.m. for Club members on Labor Day, according to the company's website.

Costco closes for seven major American holidays each calendar year: Christmas Day, Easter Sunday, Independence Day, Labor Day, Memorial Day, New Year's Day and Thanksgiving. The protocol has traditionally been followed to provide store employees with time off, as part of a broader commitment to improving and maintaining a strong work-life balance.