Costco Closed on July 4, 2020 by Rhonda February 4, 2021 443 7/4/20. Happy Independence Day! Costco will be closed today. 0 FacebookTwitterPinterestEmail previous post Nuwave Brio 6-Qt Air Fryer – Costco Sale! next post Cuisinart Custom Select Toaster-Costco Sale! 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