"We know that times are still tough and a free hot breakfast helps a lot of folks and their families," said Nelson Marchioli, CEO and president of Denny's.
An Original Grand Slam is two pancakes, 2 eggs, 2 slices of bacon and 2 sausages.
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"This year, we will even go beyond just one day of free meals, by offering a number of everyday affordable programs all year long."
For example, anyone can register through Feb. 14 online at Dennys.com or in a restaurant to win one free Original Grand Slam every week for one year.
There will be 52 winners announced, one each week. Winners will be posted each week on Dennys.com
Through Feb. 14, the first 500,000 people who sign up for the new Denny's Rewards program will receive a free burger and fries from March 1-7.
Denny's will provide free refills to any order of French fries or pancakes at participating Denny's.
Denny's offered the same free Grand Slam breakfast program last year after the Super Bowl.