Smashburger is going all out for National Hamburger Month with special offers throughout May, some requiring registration at nationalsmashburgermonth.com. The basic breakdown looks like this:

• May 10-13: Free fries with purchase of burger
• May 17-30: Kids get free meal with purchase of entrée
• May 25: Free Smashburger with purchase of entrée
• May 28: Get chance to win free food for a year by buying a Smashburger
• Wednesdays: Free prizes through Twitter-announce promotion

They also have a video/photo contest to find their biggest fan until May 21, the prize being free burgers for a year.

During May, Smashburger will accept nonperishable food items to be donated to a local food bank. Contributions will be matched with monetary support from Coca-Cola.