Costco Closed on Labor Day 2020 by Rhonda January 30, 2021 803 9/7/20. Costco will be closed on Monday, September 7, 2020, in observance of Labor Day. 0 FacebookTwitterPinterestThreadsBlueskyEmail previous post Costco Sale – Life Comfort The Ultimate Throw next post Costco Sale: Gibson Sierra 6-Piece Bowl Set You may also like Costco Coupon Book SEPTEMBER 2025 Costco Hot Buys Sale JULY 2025 Peaches and Cream Bar Cake from the Costco... Fried Chicken and Waffles at Costco! Costco Coupon Book JUNE / JULY 2025 NEW Costco Executive Member Benefits Starting June 30,...