Buy 2, get 2 at White Castle in March

There's an extra reason to celebrate the St. Patrick's Day weekend in March, at least for White Castle fans and loyalty members.

The burger chain will be offering a "buy 2 cheese sliders, get 2 free" to fans March 15 through March 17. There is a two-free limit.

The deal is available through White Castle's website, social media or Craver Nation loyalty app. New loyalty app members get a free Original Slider combo just for signing up.