Extra help will be on hand to help customers move through quickly as the Postal Service expects to process 960 million cards and letters nationwide, nearly twice the average daily volume.
In the San Francisco District, which includes the north coast, nearly 2 million pieces of mail will be postmarked Monday.
Even so, a spokesman says business is kind of slow this year.
"Last year we canceled about 1.8 million on this particular day. This year we expect it to be down a couple of hundred-thousand, maybe even a little bit more. The economy is having a large effect on the mail this year," said USPS spokesman James Wigden.
Wigden says the mail volume actually started dropping off about four months ago.
Recession or not, postal workers will deliver about 19 billion cards, letters and packages by Christmas, with this Wednesday expected to be the busiest delivery day.