The Days Carriers Don't Deliver Between Now and January: A No-Delivery Calendar for Setting Honest Promises

A delivery estimate that counts every weekday as a delivery day is wrong several times between now and mid-January. The days carriers do not deliver are known in advance. Most checkout calculators handle them badly, and your customers find out when the package does not move.

This is a calendar of the days to check, and a short process to make your promise honest.

Why this causes tickets

A customer orders on a Tuesday before Thanksgiving and sees a four-business-day estimate. The calculator counts Thursday as a business day. It is a federal holiday, and USPS does not deliver. The package arrives the following Tuesday instead of Monday, and the customer contacts you on Monday.

The carrier did nothing wrong. Your promise did.

The dates to check

These are the 2026 and early 2027 dates where delivery is commonly affected. Confirm each one against the current USPS, UPS and FedEx holiday schedules, since service by carrier varies and can change.

• Monday, October 12: Columbus Day. USPS does not deliver. Check UPS and FedEx service for your region.
• Wednesday, November 11: Veterans Day. USPS does not deliver.
• Thursday, November 26: Thanksgiving. No delivery from USPS and limited service from UPS and FedEx.
• Friday, November 27: Black Friday. Service runs, but volume is high and the delivery window is tight.
• Friday, December 25: Christmas. No delivery from USPS, limited service from UPS and FedEx.
• Friday, January 1: New Year's Day. Same pattern as Christmas.
• Monday, January 18: Martin Luther King Jr. Day. USPS does not deliver.

Add Sundays. USPS and the major carriers deliver on Sundays only in selected cases, and not for most standard ground service.

The weeks where it stacks

The most dangerous stretch is Thanksgiving through Christmas, when no-delivery days overlap with peak volume. UPS and FedEx peak surcharges are at their highest from November 22 through December 26, and peak pricing runs through January 17, 2027. A package that slips by one day in that period is as likely to slip by two.

A four-step fix

1. Load the holidays into your delivery estimate tool

Check whether your shipping app or checkout calculator lets you add blackout dates. If it does, add every date above. If it does not, shorten the quoted window or add a day.

2. Set ship-by dates per carrier, not per store

USPS, UPS and FedEx all behave differently around holidays. A single ship-by date for the whole store is a compromise that fails one carrier or the other.

3. Add a banner before each blackout

Two days before each date, put a line in the cart or announcement bar: "Orders placed after Tuesday, November 24 ship the following Monday." This turns a surprise into a policy.

4. Send a proactive message when an order straddles a holiday

For any order whose estimated delivery crosses a blackout day, send a short email on shipment with the revised estimate. Customers are far more patient with a date they were told than with one they discovered.

What to do with your own team

Warehouses have holidays too. If your fulfillment operation closes on Thanksgiving Friday or the week between Christmas and New Year, those dates belong in the same calendar. A fulfillment partner that ships same day on the days that are open gives you more room in the days that are not.

Review it again in January

Pull late-delivery tickets for each blackout week and compare to your baseline. Any week that spiked tells you which dates you are still mishandling. Update the calendar for next year while the data is fresh.

Next step: see how ShipAid Fulfillment keeps your side of the promise tight with 99.5% same-day shipping and a 99% 48-hour SLA, so carrier holidays are the only delay you have to explain.