USPS: Monday is expected to be busiest day of year

You might want to take the post office off your "to-do" list on Monday.

According to the U.S. Postal Service, Dec. 15 is expected to be the busiest day of the year both inside the post office and online.

The USPS expects to process more than 640 million cards, letters and packages.

FedEx is hoping to move a record 22.6 million packages on Monday.

And UPS expects its busiest day on Monday, Dec. 22.