Costco Hours: Memorial Day by Rhonda July 24, 2020 574 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 Weekend Update: April 25-27, 2025 Costco Weekend Update: April 18-20, 2025 Kirkland Signature Baby Wipes – Costco Sale! Strawberry Streusel Cheesecake at Costco! Yankee Candle Car Jar Ultimate Air Fresheners –... Costco Coupon Book APRIL 2025