Constitution Day is celebrated every 17th day of September to mark the signing of the U.S. Constitution in 1787. Since there are no public holidays such as Independence Day or Thanksgiving, Constitution Day mostly means that retail activities shall not come to a standstill or be hindered as detailed here, Is Constitution Day 2025 a federal holiday? Everything you need to know if you have to work on September 17 in the United States. Costco warehouses will remain open on constitutional day, September 17, 2025. On the right are some opening and closing times of Costco outlet stores for four major cities across the U.S.: New York, Los Angeles, Miami, and Chicago, along with some enlightenment for planning your next shopping escape.
Basic Costco warehouse hours
Costco warehouse shops in the U.S. have uniform hours of operation across countries and for each day.
- Monday–Saturday: 10:00 AM–8:30 PM
- Sunday: 10:00 AM–7:00 PM
These hours pertain to business members and both early and standard shopping hours. Executive members can enter the Costco outlets on weekdays at 9:30 AM, depending on local warehouse policy.
New York: Manhattan and surrounding boroughs
Apart from the Costco outlets located in Manhattan (Hudson Yards area), Costco has a few others scattered around the New York metropolitan area in Brooklyn (Red Hook) and Queens (Long Island City). On Constitution Day:
- Warehouse hours: 10:00 AM–8:30 PM
- Executive member early access: 9:30 AM–10:00 AM
With Constitution Day, the holiday traffic picks up midweek. It is advisable to arrive soon after opening to avoid large crowds. The weekday parking lots fill up by 11:00 AM, especially at flagship stores.
Los Angeles and Orange County
Southern California’s Costco outlets-from downtown LA to Irvine and Mission Viejo-follow the same schedule on September 17.
- Warehouse hours: 10:00 AM–8:30 PM
- Executive member early access: 9:30 AM–10:00 AM
Southern California shoppers often report that foot traffic reaches peak levels around midday. For a quieter experience, try to lodge in between 10:00 AM and 11:00 AM or after 7:00 PM.
Miami: South Florida warehouses
Multiple Costco chains exist across Miami and its intersections, mostly Doral, Miami Lakes and Kendall. For Constitution Day:
- Warehouse hours: 10:00 AM–8:30 PM
Executive members may enter from 9:30. Wednesdays in Miami tend to be moderately busy, with queues at the food court likely forming by 1:00 PM.
Chicago: Chicagoland area
Costco hours on September 17 in Chicago and its suburbs, such as Bolingbrook, Schaumburg and Chicago Ridge, follow the regular hours:
- Warehouse hours: 10:00 AM–8:30 PM
- Executive member early access: 9:30 AM–10:00 AM
Weekday evening hours are the busiest times of shopping. To lessen time in line for checkout, plan to visit around 10:00 AM to 12:00 PM.
Tips for a stress-free Costco outing
- Executive membership early access: If you are an Executive member, use that early access to shop before the general population is let in at around 9:30 AM.)
- Times to avoid are:
- Lunch hour, 12 PM to 2 PM, on weekdays
- Weekday evenings, 5 PM to 7 PM
- Use the Costco Mobile App: Stay up-to-date with real-time warehouse alerts on item availability and any early closures, which could be for inventory.
- Make your list: Constitution Day is going to fall in the middle of the week— stock up on your non-perishables, household essentials, and seasonal items without having to fight weekend crowds.
- Food court happenings: Most warehouses have food courts indoors offering pizza, chicken bake, and frozen yogurt. Expect lengthy queues during peak meal hours.
Costco outlets in New York, Los Angeles, Miami and Chicago will remain open in midweek, from 10 a.m. to 8:30 p.m. on Constitution Day, September 17. Executive members will have the privilege of shopping early, at 9:30 a.m. Your uninterrupted shopping experience replenishing pantry essentials, bulk household goods, and a quick in-house food court bite will be on Constitution Day. Plan in advance with early access and early timing for a swell shopping experience.
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