Most national retailers close on 2 holidays. Costco shuts down for 7.

Source: Business Insider

Costco's holiday closing dates are posted at the front entrance of a Costco warehouse. Dominick Reuter/Business InsiderNo Costco for you on Labor Day - the warehouse has long closed US stores on seven holidays each year. The retailer's former CFO Richard Galanti told Business Insider the cost was never a consideration.

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