Confirmed dates and early-access windows for Prime Day, Big Deal Days, Target Circle Week, Walmart Deals, Way Day, the Nordstrom Anniversary Sale, the Sephora and Ulta events, REI, Best Buy and Costco events, Black Friday ad releases and price-match rules, invite-only deal programs, early-access eligibility and membership requirements, price-history warnings on inflated event prices and event outages, with the retailer first and the dates in the title.