If you are mailing something today, you should expect to stand in line.
The United States Post Office says Monday, Dec. 17, will be the busiest mailing day of 2012.
The postal service expects to receive 658 million cards, letters and packages today, compared to 528 million on a regular day.
It's part of the 18 billion pieces of mail the USPS predicts it will deal with between Thanksgiving and New Year's Eve this year.
The USPS says the busiest delivery day for cards this year will be Wednesday. The busiest delivery day for packages will be Thursday.
was also the Monday before Christmas week.
You can check for postal locations and hours of operations by going to this USPS website and clicking on "find a location."
Do you mail something today? If so, tell us about it in the comments and post a photo with this story, if you have one.