The day is declared each year by the National Hot Dog and Sausage Council, and also coincides with the annual hot dog picnic on Capitol Hill.
What's in a name: Hot dogs got their nickname "frankfurters" after being invented in in Frankfurt, Germany in 1484.
For a bit of nostalgia, shop Kohl's to get the Nostalgia Electrics Diner-Style Hot Dog Steamer for $10 off (at $39.99). There are several restaurants offering freebies and other deals today, and these are the five best places to take advantage of the unofficial holiday.
Toppings: 86 percent of adults top their dogs with mustard.More news: Putin says he wanted Trump to win in 2016, didn't interfere
All day on National Hot Dog Day 2018, 7-Eleven Big Bite hot dogs are $1 each.
Stop by participating Fancy Franks locations in Canada to get a free hotdog today from noon to 5pm.
National Hot Dog Day is July 18 and there are plenty of deals to go around! You must be a member of My Hwy 55 Rewards Program. Dine-in only, while supplies last for new users at participating locations. Over at Philly Pretzel Factory, the first 100 customers get a free pretzel dog.
Pilot Flying J: With the myPilot app Wednesday, get a coupon for a free hot dog or roller grill item.
Ballpark history: Hot dogs are the MVP at Major League Baseball parks and became standard fare in 1983.