Costco Closed on Labor Day 2019 by Rhonda February 15, 2021 766 9/2/19. Costco will be closed on Monday, September 2, 2019, in observance of Labor Day. 0 FacebookTwitterPinterestThreadsBlueskyEmail previous post Costco – Synergy Kammi Pushback Recliner next post Costco Sale – Klamath Fireplace Mantle 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,...