McDonald's Filet-O-Fish is not one of the most popular items in the fast food chain's menu. However, it certainly attracts more customers than usual every time March starts.

The increased popularity of McDonald's Filet-O-Fish every March has been a trend for so long that some even calls March the season of Filet-O-Fish. The increase in the sales of McDonald's Filet-O-Fish every March can only be attributed to the start of Lent, according to a report by Yahoo Finance.

Christians who participate in Lent usually refrain from eating meat as a form of fasting. They stick to eating fish dishes during Lent.

McDonald's Filet-O-Fish sells very well during the entire 40 days when Lent is being observed. The popularity of the item during Lent helps boost McDonald's sale. The majority of the annual sale of Filet-O-Fish happen in March.

McDonald's Filet-O-Fish is quite special as it is the only food item in the fast food chain's menu that is made from seafood. In addition, the main ingredient of McDonald's Filet-O-Fish this year is wild-caught Alaskan Pollock, The Comeback reported.

For some, using wild-caught Alaskan Pollock may not seem unusual. However, McDonald's is using that fact to market its Filet-O-Fish. Using wild-caught Alaskan Pollock suggests that McDonald's is supporting sustainable practices when it comes to food gathering.

The Filet-O-Fish has been around for fifty-five years. It was created by a franchisee of McDonald's in order to serve something to the fast food chain's clients every Lent. In anticipation of the increase in demands, McDonald's appears to be concentrating on making sure that customers do not have to wait long to get their hands on the Filet-O-Fish sandwich.

In another restaurant-related news, several restaurants of Outback Steakhouse, Bonefish Grill, Carrabba's Italian Grill and Fleming's Prime Steakhouse Restaurants are closing down, Jobs & Hire previously reported.