The Mayan calendar predicts the world will end on Friday, December 21, 2012.
The idea has some Middle Tennesseans thinking about how they would survive if it does.
At Friedman's Army Navy Surplus store on 21st Avenue South in Nashville, survival gear is selling like there's no tomorrow, according to employee Nestor Ilagan.
“Basics like first aid, water purification, meals ready to eat and interestingly enough gas masks,” Ilagan told Nashville's News 2.
The store is sold out of gas masks and emergency rations and is running low on first aid kits.
Owner Frank Friedman said he noticed an increase in customers coming in to buy such supplies a few months ago.
The last few weeks, they've been selling so fast he can't keep them in stock.
Friedman said customers are up front about why they want the items.
“Oh yeah, they make no bones about it,” he said. “They are honest people and they say I'm worried and we fix them up so they walk out with a sense of security.”
The sense of security comes in a “Go Bag,” which is a backpack filled with survival gear.
“I tell them that it's very much like an insurance policy. It's not something that I want to have to use, but I have it if I need it,” Ilagan said.
Whether the world comes crashing to an end Friday or not, the items will still be useful in an emergency situation.
“If you get stuck in your car on the interstate or on a side street and you need a little nourishment or some liquid, whatever you need you'll be ready,” said Friedman.
A bag full of all the supplies costs anywhere from $200 to $300.