Say cheese!

No, you're not having your picture taken, but in the U.S. there is definitely a good reason to smile Monday: Aside from most people not having to go into work because of the federal Labor Day holiday, Sept. 5 is National Cheese Pizza Day. That means everybody, regardless of age, shouldn't hesitate to indulge in every college student's favorite meal that, according to NBC News, was pioneered in Greece before being fine-tuned and popularized in Italy.

And while it is trendy to reach for your smartphone and hit up one of the many food delivery apps to order the latest fancy artisanal pizza incarnation, you might want to give your wallet a break from putting in some hard work on Labor Day and instead look toward one of national chains of pizzerias. Why? Because they're offering a host of deals, including -- in some instances -- freebies. Check out the below deals, courtesy of Go Banking Rates, Fyvor and the companies themselves).

Papa John's

These codes will get you 50 percent off any order:

dbacks50

SOXWIN (Chicago only)

C1976 (San Diego only)

G3302 (on regular menu price)

These codes will get you 40 percent off:

 

PAPASLAM (only on the day after at least one grand slam was hit in an MLB game)

P816C8 (on regular menu prices)

These codes will get you 25 percent off:

25OFF (good through the end of 2017)

25VISA

ORIOLES25

LOOMIS25 (online orders only)

SAVE25

Pizza Hut

AH3PB8DH5HX3 for two large pizzas for $8.99 each.

visa5 for $5 off any order that is at least $25.

CX for one large pizza, one side order and 2 liter bottle of soda for $15.

EEOFREESTICKSWPIZZA for a free order of breadsticks with a large pizza.

The company itself offers a wide variety of deals on its website.

Domino's

9193 to pay $5.99 for select items.

Domino's has a variety of coupons that are being honored on a rolling basis.

4322 to pay $17.99 for two medium two-topping pizzas along with a 16-piece Parmesan Bread Bites.

9081 for a large, one-topping pizza.

3727 to pay $19.99 for one medium one-topping handmade pan pizza, one medium one-topping pizza, one 16-piece Parmesan Bread Bites and a 2 liter bottle of soda.

9204 to pay $8.99 for one medium, two-topping handmade pan pizza.

9174 to pay $7.99 for each large pizza ordered.

Domino's is also offering its own coupons both nationally as well as locally.

Buon appetito!