USPS to expand Sunday delivery in most major cities beginning November 24

A row of USPS vehicles lined up in a parking lot. (Jonathan Weiss / Shutterstock)

The U.S. Postal Service is preparing for a busy holiday season.

They estimate more than 800 million packages will be delivered between Thanksgiving Day and New Year's Day.

That's about 20 million packages a day.

To make sure that people are getting their items on time, USPS is going to expand its Sunday deliveries in most major cities starting on November 24.

For an extra fee, carriers will even deliver on Christmas Day.