The holiday season is well underway! If you have gifts or cards to send via the United States Post Office, be sure to get them sent out by the cutoff dates if you want them to get there by December 25th. For First-Class Mail, the cutoff date is December 16th. For Priority Mail, the cutoff date is December 18th. The latest date you can send gifts by USPS is December 20th; you’ll have to send them by Priority Mail Express.