Around once a year, Firehouse Subs will run its popular Name Of The Day promotion.  If you're one of the lucky folks who has the same first name as one of those listed, you can get a free Medium Sub with any other purchase!  Sometimes, it's very generic, like if you name starts with "C" or "J".  Other times, it's more specific, like if you name is Sally, Sam, or Sandra.  Firehouse Subs will run the Name Of The Day for a couple of weeks, so chances are at some point you'll be able to cash in.