Sept. 14 has been officially declared “Anthrax Day in the Bronx” – but residents of the New York borough needn’t spend the day suspiciously eyeing their mail or looking out for contaminated packages. Bronx Borough President Ruben Diaz Jr. made the declaration in conjunction with the Big 4 concert featuring Metallica, Megadeth, Slayer and Anthrax taking place at New York’s Yankee Stadium that same day.

Anthrax formed in the Bronx section of New York in 1981, and 30 years later the thrash masters are celebrating their triumphant return to the neighborhood with the Yankee Stadium gig. As the borough gears up for the big day, the Bronx Tourism Council is offering something called the "Metal Heads Welcome" promotion, which will spotlight the businesses on and around 161st Street surrounding the stadium.

Bars and restaurants will serve up delicious concoctions like “Metallica Martinis” (what's more metal than a martini?) and “Metal Mayhem Meatball” specials as music from the "Big 4" -- Metallica, Megadeth, Slayer and Anthrax -- cranks on their stereos. Perhaps they can get a few recipes from Jagermeister's 'Big 4' metal cocktails.

While the timing of “Anthrax Day” is a little suspect -- it was 10 years ago that anthrax-laced letter attacks brought fear to postal workers in New York, Washington D.C. and beyond following the events of 9/11 -- Diaz insists the day will only bring good vibes.

“This mega concert, one of the most anticipated events in recent memory, will bring thousands of new visitors to the Bronx,” he said in a press release. “We’re inviting concertgoers to come early and count down to the start of the show at our great neighborhood restaurants and bars, and take in a little of what the Bronx has to offer.”

He continues, "The Bronx may be known as the home of hip-hop and salsa, but make no mistake, our musical contributions are much more expansive. These heavy metal legends grew up right here in our borough, and I am proud to welcome Anthrax back to their Bronx home."