Wednesday is one of the cheesiest and beefiest days of the year

Sept. 18 is National Cheeseburger Day and restaurants are celebrating the made-up food holiday with discounts and free burgers.

According to Ranker, a crowd-sourced voting platform, the top five fast food burgers were: Five Guys burger, In-N-Out Double Double, Five Guys cheeseburger, Burger King Whopper and Wendy's Baconator. The favorite burger topping was cheddar cheese.

The top three of the top five fast food chains ranked aren't known for serving burgers. The top five chains are: Subway, Chick-fil-A, KFC, Wendy's and Five Guys.

We've rounded up the burger bargains available Wednesday unless otherwise noted at participating locations. We're also filling your appetite for deals with ongoing sign-up offers.

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Cheeseburger Day deals and freebies

To be on the safe side, always check with your closest location before heading out. Also, some will require you to have a restaurant's app or be signed up for emails.

Applebee's: Get a Classic Bacon Cheeseburger with endless fries for $6.99 Wednesday.

B.Good: Through Sept. 22, get a free burger when you download the B.Good app at www.bgood.com/rewards.

Black Angus: Get the Steakhouse Bacon Cheeseburger or the Guacamole Cheeseburger with cole slaw or fries and a beer for $12.99 Wednesday in the BullsEye Bar.

BurgerFi: Locations nationwide will be offering $1 cheeseburgers with the purchase of a cheeseburger Wednesday. Must mention the offer for in-store orders only.

Burger King: Through Sunday, get a cheeseburger for 59 cents with a mobile order on the chain's app. Limit one coupon per person.

Burgerville: Get $1 Original Cheeseburgers Wednesday, limit five per transaction and, in the drive-thru, two transactions per car.

Dairy Queen: The chain is celebrating Cheeseburger Day with its new two for $4 Super Snack deal, which includes mix and match snacks including choice of a cheeseburger, a small sundae, fries, pretzel sticks or chicken tenders.

Del Taco: Not a Cheeseburger Day deal, but through Sept. 25, get a free Carnitas Combo Burrito or Carnitas Loaded Fries with any purchase through the chain's app with promo code TOPTHEBELL.

Dog Haus: Order one of seven Haus Burger creations and get a second patty with cheese added Wednesday. Scan the Dog Haus app in-restaurant to redeem.

DoorDash: This deal isn't only for National Cheeseburger Day and continues through Sept. 30. Place an order through DoorDash and use promo code FEEDAMERICA and DoorDash will provide 10 meals to Feeding America per order and customers will get a $5 credit to use on an order in October.

Farmer Boys: Starting at 2 p.m. Wednesday, mention the Cheeseburger Day deal to get one for $2 at participating locations.

Grubhub: Select restaurants including Applebee's, Bareburger, BJ's Restaurant & Brewhouse, Carl's Jr., Fatburger, IHOP, Jack in the Box and Red Robin are offering $5 off orders Wednesday through Grubhub's new in-app Perks feature. To access Perks, click the tab at the bottom of the screen in the Grubhub app.

Habit Burger Grill: Through Sept. 25, make a donation of $2 or more to No Kid Hungry and get a certificate for a free Charburger with cheese to redeem on a future visit.

Houlihan’s Restaurant + Bar: Get a $5 Houlihan’s Cheeseburger and fries all day Wednesday.

Hungry Howie's: Through Sunday, get a large pepperoni or cheese pizza for $5.55 with code 555LG for carryout only. Limit five.

Hurricane Grill & Wings: Get a $5.99 cheeseburger or a $6.99 cheeseburger and fries special Wednesday.

Islands Restaurants: Get $5 off all burgers Wednesday.

Jack in the Box: Get a free burger of your choice with any app purchase at participating locations Wednesday. The coupon is for one-time use.

Kum & Go: &Rewards members get a free burger Wednesday. To join the loyalty program, go to www.kumandgo.com/rewards or download the app by texting APP to 39771.

McDonald's: There won't be a national deal, but check the McDonald's app for local and regional promotions.

Miller's Ale House: From 11 a.m. to 3 p.m. Wednesday, cheeseburgers are $5.99 when you show an offer in email or at www.millersalehouse.com/national-cheeseburger-day.

MOOYAH Burgers, Fries & Shakes: With the rewards app, get a free cheeseburger Wednesday with purchase of fries and a drink or shake.

Ninety Nine Restaurant and Pub: Get a $5.99 cheeseburger Wednesday dine-in only with choice of cheese and fries.

O'Charley's Restaurant and Bar: Add two free slices of bacon to a cheeseburger Wednesday with a coupon that will be posted on O'Charley's Facebook, Instagram and Twitter Wednesday morning. Dine-in only.

Red Robin: With any beverage purchase at participating restaurants Wednesday, get a Gourmet Cheeseburger and Bottomless Steak Fries for $5. Learn more at www.redrobin.com/national-cheeseburger-day.

Shari’s: New or existing Shari’s Rewards members get the plant-based Beyond Burger with or without cheddar cheese on a pretzel bun for $1 Wednesday, dine-in only and no other purchase is required. Join the loyalty program by texting PIE and your email address to 73757. If you prefer meat, Shari’s will offer a $5 a la carte beef burger on a pretzel bun Wednesday too. Fries for both burgers are extra.

Smashburger: Get a buy-one-get-one free deal on double classic Smashburgers Wednesday.

Ted's Montana Grill: Get Ted's Cheeseburger Meal, which includes fries, for $6 or upgrade to the bison cheeseburger for $8 Wednesday with a coupon that will be posted on Ted's social media.

TGI Fridays: This Cheeseburger Day deal takes place every Tuesday for a limited time. Get $5 classic cheeseburgers with seasoned fries for dine-in and online orders.

Twin Peaks: Get a cheeseburger and fries for $6 Wednesday. Dine-in only, one offer per guest.

Waitr and Bite Squad: The on-demand delivery apps are offering free delivery Wednesday on orders $15 or more with promo code CHEESY.

Wendy’s: Coupons in the Wendy’s app Wednesday include $2 off any Premium Combo, a free fry plus drink with a premium sandwich mobile order, free small Frosty with purchase of Premium Combo and get free six-piece Spicy Nuggets with a mobile order

White Castle: Get one free Cheese Slider with any purchase Wednesday and a coupon posted at www.whitecastle.com/value-offers.

More deals: Some smaller chains and locally owned businesses also will have deals Wednesday. One of the easiest ways to find specials is by checking social media accounts.

Ongoing sign-up deals, rewards

Most of these specials are ongoing offers and require signing up for email clubs or downloading and using smartphone apps. Participation varies by location.

A&W: Get a free A&W Root Beer Float for your birthday and monthly deals when you join the Mug Club at www.awrestaurants.com.

Burger King: Find coupons on the restaurant's smartphone app, which can be downloaded at www.bk.com/app.

Carl’s Jr.: Get a coupon for a free small fries and beverage with the purchase of any Western Bacon Cheeseburger for signing up for emails at www.carlsjr.com/email_signup.

Checkers: Get a coupon for a free large fry with any purchase when you sign up for emails at www.checkers.com/deals.

Culver's: Sign up for the chain's eClub for "delicious perks" at www.culvers.com.

Dairy Queen: Find deals including buy-one-get-one offers on the chain's mobile app to use at participating locations. Limit one offer per person per visit. There's a different app for Texas residents.

Hardee's: Get a coupon for a free small fries and beverage with the purchase of any "One-third pound Thickburger" for joining the chain's email list.

Jack in the Box: Unlock special offers when you enter your email or cell phone at www.jackinthebox.com/offers.

McDonald’s: The fast-food chain’s app has ongoing coupons. Download the app at www.mcdonalds.com.

Rally's: Get a coupon for a free large fry with any purchase when you sign up for emails at www.rallys.com/deals.

Shake Shack: Sign up for exclusive offers at www.shakeshack.com.

Sonic Drive-In: Find deals at www.sonicdrivein.com/deals and download the Sonic app for a free slush or drink at www.sonicdrivein.com/app.

Steak 'n Shake: Find savings, learn more about half-price happy hour and join the rewards program at www.steaknshake.com.

Wendy’s: Get exclusive offers on the smartphone app at www.wendys.com.

Whataburger: Earn free food with the smartphone app, which can be downloaded at whataburger.com.

White Castle: Find specials at www.whitecastle.com/promotions.

Wienerschnitzel: Find coupons and sign up for the Wiener Lovers’ Club at www.wienerschnitzel.com/specials.

Zaxby's: Sign up for email, text and snail mail Zax Clubs at www.zaxbys.com/zax-club.

Follow USA TODAY reporter Kelly Tyko on Twitter: @KellyTyko