ATLANTA, Ga – Colder temperatures, falling leaves, warm sweaters … McRibs?

That’s right. To its followers, the McRib, a faux-barbecue rib sandwich from McDonald's, is as much a part of November and December as holiday lights and celebrations.

The sandwich, topped with barbecue sauce, pickles and onions and served on a hoagie style roll, debuted in 1981 and was sold year-round for a while. But a few years later, McDonald's pulled the menu item from its shelves and began offering the sandwich only for a few weeks each year.

For the past several years, the sandwich’s most regular availability has been in November and December.

Last week, McDonald’s announced an iPhone app that lets people message other McRib fans as to where the sandwich has been spotted. It’s free and uses the smartphone’s GPS to find the nearest McRib-selling McDonald’s.

There has also been an online McRib locator for the past couple of years where fans can report sightings of the elusive sandwich to its cult-like followers, which will only be available until Dec. 31.

McDonald’s allows franchisees to decide whether they want to offer it, but not all of them do.

A search of the map reveals several confirmed sightings around the metro Atlanta area.