As we rush headlong into the middle of December, 2019's shipping deadlines to get packages to their destinations in time for Christmas are quickly approaching.

Whether you have something that you plan to ship via the U.S. Postal Service, UPS, or FedEx, or you're shopping online and need to make sure that your goodies get to you on time, Forbes put together a handy guide of 2019 shipping deadlines for major carriers.

Here are the key dates for the big shippers:

U.S. Postal Service

Dec. 14: USPS Retail Ground shipments
Dec. 18: Alaska to continental U.S. First-Class Mail
Dec. 19: Hawaii to continental U.S. Priority Mail and First-Class Mail
Dec. 20: First-Class Mail Service
Dec. 21: Priority Mail
Dec. 23: Priority Mail Express

UPS

Dec. 19: UPS 3 Day Select
Dec. 20: UPS 2nd Day Air
Dec. 23: UPS Next Day Air

FedEx

Dec. 16: Ground and Home delivery
Dec. 19: Express Saver
Dec. 20: FedEx 2 Day
Dec. 23: FedEx Standard, Priority, and First Overnight
Dec. 25: FedEx SameDay, FedEx SameDay City Direct, and City Priority

And here are dates for a few of the big online retailers:

Amazon Prime

Dec. 22: Free two-day shipping on qualifying items
Dec. 23: Free one-day shipping on qualifying items
Dec. 24: Free same-day shipping on qualifying orders over $35 and in same-day delivery areas.