Costco Hours: Memorial Day 2015 by Rhonda July 21, 2020 468 Costco will be closed on Monday, May 25, 2015, in observance of Memorial Day. 0 FacebookTwitterPinterestEmail previous post Costco Weekend Update: May 22, 2015 – May 24, 2015 next post Costco Clearance: Mikasa French Countryside Stoneware 20-Piece Dinnerware Set $39.97 You may also like Costco In-Warehouse Hot Buys Sale – OCTOBER 2024! Colorful Tupperware Heritage Container Set at Costco! Costco Black Friday 2024 Ad (Plus Pre-Black Friday... Yummy White Mini Cakes w/Buttercream Icing at Costco! Dilettante Chocolate Peppermint Truffles at Costco! Costco Unadvertised Sales! OCTOBER 2024