With Christmas fastly approaching, millions of people are already making headway on their holiday shopping lists.

The three largest carriers in the U.S. — The United States Postal Service, UPS and FedEx — have released their deadlines for shipping this year to make sure people get their gifts on time.

Here are dates to keep in mind to get gifts by Christmas Day:

USPS

For the lower 48 states:

USPS ground advantage service: Dec. 17

First-class mail service: Dec. 17

Priority mail service: Dec. 18

Priority mail express service: Dec. 20

For Alaska, Hawaii, Puerto Rico and U.S. Territories:

USPS ground advantage service: Dec. 16

First-class mail service: Dec. 17

Priority mail service: Dec. 18

Priority mail express service: Dec. 20

UPS

UPS ground and ground saver: Use this calcul

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