Charlotte, NC - Mailing companies say this Monday and Tuesday are the busiest days of the year to send holiday mail.
The post office estimates 15.5 billion parcels will be mailed this holiday season. UPS is planning to deliver more than 630 million packages this season.
FedEx says it too will deliver a record breaking 317 million packages between Black Friday and Christmas Eve.
USPS officials say they'll even be open this Sunday at four locations in the Charlotte area to accommodate the rush.