Costco Hours: Memorial Day by Rhonda July 24, 2020 540 Costco will be closed on Monday, May 26, 2014, in observance of Memorial Day. 0 FacebookTwitterPinterestEmail previous post Costco Books – The One & Only by Emily Giffin next post Costco Sale – Rubbermaid 3 Step Aluminum Step Stool You may also like Costco Coupon Book MARCH 2025 Costco Hot Buys Sale: 2/22/25 – 3/2/25 Costco Organic Coupon Book: FEBRUARY 2025 (NW) Costco Take & Bake Pizza Sale! Costco Unadvertised Sales! FEBRUARY 2025 Stylish Bar Cabinet at Costco!