Costco.com 4th of July Sale! by Rhonda July 5, 2021 711 7/4/21. Even though Costco stores are closed today in observance of Independence Day, costco.com is open and is having a huge sale! Check out hundreds of deals at costco.com, while supplies last. 0 FacebookTwitterPinterestEmail previous post Costco Closed on the 4th of July next post Savannah Fabric Hamper with Lid – Costco Sale! 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