LetterAgent
Mail physical letters by just asking your AI assistant.
Home > Guides > USPS holiday mailing deadlines 2026
For expected delivery by Christmas Day in the lower 48, USPS recommends mailing by December 17 for Ground Advantage and First-Class Mail, December 18 for Priority Mail, and December 19 for Priority Mail Express. For Alaska, Hawaii, Puerto Rico, and US territories, Ground Advantage moves up to December 16. These are recommendations from USPS's September 22 announcement, not delivery guarantees.
The Postal Service announced its recommended 2026 holiday mailing dates on September 22, and they are aimed at expected delivery before December 25. For addresses in the contiguous United States, the dates are:
| Service | Lower 48 send-by date | Alaska, Hawaii, Puerto Rico, territories |
|---|---|---|
| USPS Ground Advantage | December 17 | December 16 |
| First-Class Mail | December 17 | December 17 |
| Priority Mail | December 18 | December 18 |
| Priority Mail Express | December 19 | December 19 |
Two things to notice. First, Ground Advantage and First-Class share the same date, December 17, for most of the country: if you are mailing holiday cards, either one works on the same timeline. Second, only Ground Advantage gets an earlier date for the non-contiguous destinations, December 16, because ground transportation to those places takes the longest.
The September announcement did not include military (APO, FPO, DPO) or international dates. The Postal Service said the complete list of suggested dates for those addresses would appear on its holiday shipping page beginning in mid-October. Military mail in particular needs much earlier send-by dates because it travels through the military postal system after USPS hands it off, so check the updated list before you mail anything to a service member.
No. They are recommendations, and USPS says so explicitly: send by these dates for expected delivery before December 25. The holiday season is the heaviest volume period of the year, weather delays happen, and the Postal Service's own advice is to mail and ship early. Treating the recommended date as the last safe day is backwards: treat it as the last reasonable day, and aim a few days earlier.
One more wrinkle worth knowing: holiday cards mailed as First-Class Mail in mid-December are competing with the year's biggest parcel surge for the same trucks and sorting machines. A card mailed on December 17 in a busy metro area is cutting it closer than the same card mailed from a small town. When the card matters, early beats clever.
Upgrading the service is the main lever: Priority Mail buys you a day over Ground Advantage, and Priority Mail Express buys you one more. After December 19, Express is your only USPS option with a delivery commitment, and even then, check the commitment for your destination before you pay. For letters specifically, remember that a service like LetterAgent can print and mail your holiday letters for you, but it cannot bend the Postal Service's calendar: anything mailed after the recommended dates is a gamble, whoever drops it in the mail.
Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com