USPS Delivery Schedule Explained: Days, Times, Holidays

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The United States Postal Service (USPS) normally delivers mail Monday through Saturday, with Sunday delivery available for selected package services. An item’s expected arrival date depends on the service used and when USPS accepts it; if the service has a delivery guarantee, an eligible late shipment may qualify for a postage refund.

When mail arrives during the week

USPS aims to finish deliveries by 5 p.m. local time Monday through Saturday, but it does not guarantee a carrier’s arrival time. Daily mail volume varies, and traffic, staffing changes, severe weather, natural disasters or changes in a carrier’s route can push deliveries later.

Federal law requires delivery at least six days a week, with exceptions for weeks containing a federal holiday, emergencies such as natural disasters and areas where USPS already had a fewer-days policy when the Postal Service Reform Act of 2022 became law. Saturday therefore belongs to the ordinary delivery week; Sunday does not provide the same general mail service.

Priority Mail Express offers Sunday and holiday delivery in many major markets for an additional fee. A Sunday package delivery does not mean that ordinary letters will arrive that day, or that every Amazon parcel has a Sunday commitment.

How long each USPS service takes

A service standard is the expected number of days between USPS acceptance of an item and its delivery. An expected arrival date helps with planning, but a money-back guarantee adds a different promise: eligible late shipments can qualify for a postage refund.

First-Class Mail covers postcards, letters and large envelopes, also called flats. For packages, USPS launched Ground Advantage on July 10, 2023, replacing Retail Ground, Parcel Select Ground and First-Class Package Service.

Media Mail is restricted to eligible books, media and educational materials, including books of at least eight pages and sound or video recordings. Video games, computer drives and digital drives do not qualify, and USPS can inspect Media Mail packages and charge higher postage for ineligible contents.

The table lists longer Ground Advantage estimates between the contiguous 48 states and the Freely Associated States (the Republic of the Marshall Islands, the Federated States of Micronesia and the Republic of Palau) and longer Priority Mail estimates to or from those countries.

Priority Mail Express provides 1 to 3 day delivery by 6 p.m. to most U.S. addresses and Post Office boxes, with limited exceptions. It is not automatically an overnight service; the shipment’s own guaranteed arrival time matters more than the product name.

Counting days without missing the cutoff

First-Class Mail’s business-day estimate excludes Sundays and postal holidays. In April 2025, the Postal Regulatory Commission explained that for mail accepted on a Saturday or the day before a federal holiday, the following Sunday or holiday is skipped when counting delivery days.

Under USPS’s Regional Transportation Optimization initiative, the commission also described next-day collection, rather than same-day collection, for mail dropped at Post Offices and collection boxes more than 50 miles from a regional hub. The time an item is dropped into a box and the time USPS begins moving it can therefore differ.

For Priority Mail Express deposited in a collection box, the service commitment does not start until USPS picks it up and records a valid acceptance or processing scan. Collection times appear on the box’s label and can vary by weekday or transportation schedule, including the day before a holiday.

Check the collection label before depositing deadline-sensitive mail; its QR code can also show the nearest Post Office’s address and hours. For an item’s expected delivery day, use USPS’s Service Commitments lookup with the sender’s and recipient’s ZIP Codes. For Priority Mail Express, the mailing receipt shows the guaranteed arrival time.

USPS Holidays and Special Events

A commercial summary from IRIS Postal Forms says that on postal holidays, Post Office retail counters close and carriers do not deliver regular mail.

USPS’s Columbus Day notice says customers can still order stamps and use services such as Hold Mail and Click-N-Ship online when Post Offices are closed, while self-service kiosks are available in select lobbies. Priority Mail Express offers paid holiday delivery in many major markets.

USPS lists the following postal holidays for 2026.

The Office of Personnel Management’s holiday rules generally move a Saturday holiday to Friday, or a Sunday holiday to Monday, for federal employees who work Monday through Friday. That employee observance calendar is not a substitute for USPS’s delivery calendar.

Independence Day in 2026 illustrates the difference: Friday, July 3, had normal deliveries and open Post Offices, while all Post Offices closed on Saturday, July 4. Regular delivery and retail service resumed Monday, July 6. USPS’s calendar explains that the preceding Friday can still be a holiday for some employees’ pay and leave purposes.

For current information about neighborhood delivery or whether a local Post Office is open, check USPS Service Alerts or call 800-275-8777.

Why a delivery can arrive late

USPS says unusual circumstances can delay or reroute packages and recommends comparing the delivery standard, checking tracking when available and contacting the shipper before contacting USPS. Its Service Alerts identify disruptions caused by weather, natural disasters, special events and other changes affecting postal facilities.

The Postal Regulatory Commission distinguishes the number of days mail should take from USPS’s annual targets for the share of mail that arrives within those standards. A quoted delivery range describes an expectation for the service, not proof that a particular item has stayed on schedule.

What tracking tells you and what to do next

USPS Tracking shows an item’s current status and, when available, the date, time and location of delivery or attempted delivery. It does not speed up or guarantee delivery. Ordinary First-Class postcards, letters and flats are not eligible for standard USPS Tracking, although certain extra services such as Certified Mail and Registered Mail provide barcode-based tracking information.

If tracking displays an Expected Delivery Window, that two-hour estimate is not guaranteed; the package may still arrive by the end of the day. Use the item’s actual status to choose a next step rather than treating an estimated hour as a missed guarantee.

Read the status before requesting help

“Shipping Label Created, USPS Awaiting Item” means the shipper has made a label but has not yet given the package to USPS. Contact the shipper with questions about that status.

An out-for-delivery status means the local Post Office has prepared the package for delivery that day, but a different carrier may bring it at a different time from regular mail. If it has not arrived after one full postal business day following that scan, submit a service request using the tracking number.

For a “Delivered” scan without a package, check the recorded delivery location, the mailbox and porch, sheltered spots, other household members and building management. At a community mailbox, a key left in the regular mail compartment identifies the parcel locker holding the package. If it is still missing more than one postal business day after the scan, USPS advises submitting a service request for eligible items.

After a delivery attempt, a redelivery request can be made without the paper notice, but the request needs the item’s tracking number or barcode number.

A mail preview is different from a delivery scan

Informed Delivery is USPS’s free service for preview images of incoming mail and status updates for incoming and outbound packages, available by daily email, dashboard or app. The mail images come from sorting machines that photograph the address side of items moving through the postal network. Those images show mail approaching its destination, not a carrier’s completed delivery at the door.

Search for missing mail or seek an eligible refund

The Missing Mail application accepts search requests from seven to 365 days after the original mailing date. To start a search, sign in at MissingMail.USPS.com.

Late retail First-Class Mail does not qualify for a postage refund simply because it missed the expected date. Only the sender can request a Priority Mail Express postage refund. USPS’s refund page directs the sender to use the tracking number and mailing receipt to request an eligible refund online with a free USPS.com account.

The refund rules also exclude certain addressing problems, requested holds and authorized disruptions. For Priority Mail Express 1-Day items mailed December 22 through December 25, postage is not refunded if delivery was made or attempted within two business days.

Request a refund two to 30 days after mailing for Priority Mail Express without extra services, or 30 to 60 days after mailing if an extra service was purchased.