The gifts have been opened, the holiday spread has been devoured, but for many, the one part of the Christmas season that isn't over is shopping.

The packed parking lots and long lines make it look like people are finishing up their holiday shopping and, in a sense, they are.

"I don't do after Thanksgiving, that Black Friday," said shopper Clara Kloster, "so this is my day."

Just when you thought it was over, shoppers are once again hitting stores in droves, whether it's to return that unwanted gift:

"(I'm) returning a gift I don't use," said another shopper, Daryl Brown. "Somebody gave me a drill. I don't have a purpose for a drill."

. . . or to take advantage of deep discounts:

"Gotta get in on those deals, the wrapping paper and boxes and bags," Koster said.

The day after Christmas is typically a very big day for retailers, but experts say business should be better than ever this year.

According to the research firm ShopperTrak, traffic in stores on the day after Christmas was expected to be up 60 percent compared to last year.

One of the reasons is the timing of the holiday. This year, Christmas fell on a Sunday, so many people have Monday off are spending it bargain hunting.

"I looked online at their ad online, so there's some good stuff I should probably be able to find," said Matthew Hill.

"I have the day off, my wife is working, so I figure I'll get the kid out of the house and go brave the crowds," Hill said.

The final round of holiday shopping will last a little longer. Experts say the coming week could account for as much as 15 percent of total spending this season.