The Costco holiday hours guide 2026 matters more than usual this year, because the next nine weeks pack in Halloween, Veterans Day, Thanksgiving, Black Friday, Christmas, and New Year's, and Costco handles each one differently. Today is October 22, 2026. Nothing is more frustrating than driving to a warehouse with a full cart list and finding the doors locked, so here is every date to plan around, with the days of the week checked. One honest note first. Costco does not publi