While consumers spent the holiday weekend – and some of their work hours Monday – ordering packages via the Internet, the United States Postal Service is gearing up to deliver a record amount of purchases.

Cyber Monday is the first workday following the Thanksgiving holiday and traditionally is the biggest online spending day of the year. According to the National Retail Federation, 51.8 percent of people will take advantage of Web-based sales.

“The holiday season is our Super Bowl, with 365 million packages expected to be delivered by the Postal Service this year,” said Gary Reblin, vice president of domestic products for the USPS.

The NRF predicts holiday sales to grow 12 percent this year to nearly $100 billion – that means each person will do more than a third of their shopping online. The numbers show support for the growing popularity of online shopping, which grew from $72 billion in 2002 to $250 billion last year.