Costco Hours: Memorial Day by Rhonda July 24, 2020 374 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 NEW Orange Dreamsicle Cheesecake at Costco!! Costco Coupon Book AUGUST 2024 Costco In-Warehouse Hot Buys Sale – JULY 2024! Costco Business Center Coupon Book JULY / AUGUST... Costco Sale: Kirkland Signature Hexagon Dog Bed Costco Member Savings Days 7/15/24 – 7/19/24