Millions across the country will be sending packages or receiving holiday mail on Monday. The United States Postal Service is expecting it to be their busiest delivery day of the year.
They'll deliver 15.5 billion cards, letters and packages over the holidays.
Because of the growing online shopping trend, USPS officials have turned to alternative ways to get the deliveries out on time. They've rented U-Haul and Enterprise vans to help deliver packages.
Monday is the deadline for Priority Mail that will arrive by Christmas Eve. Wednesday is the deadline for Priority Mail Express but you can expect to pay more.