Costco: July 4, 2018 by Rhonda July 16, 2020 July 16, 2020 7/4/18. Happy 4th of July! Costco will be closed today. 0 FacebookTwitterPinterestEmail previous post Costco Sale: Cascade Mt.Tech Carbon Fiber Trekking Poles $24.99 next post Costco: Cuisinart Mandoline Slicer $19.99 You may also like NEW Mini Raspberry Cakes at Costco! Infinity Boss Three Disc Ladies Comfort Bike –... Key Lime Pie at Costco! Pfaltzgraff Joanne Dinnerware Set at Costco! Toto Washlet Elongated Bidet Seat at Costco! OXO SoftWorks 9-Pc POP Container Set – Costco...