Today marks one of the most underrated holidays of the year — National Pizza Day! So, how can you celebrate such a monumental occasion? By getting free pizza on National Pizza Day, of course [well, almost free]! From Pizza Hut to even Baskin Robbins, there are plenty of chains who are ready and willing to make sure you are doing it right.

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Baskin Robbins

You can stop into the well-known ice cream establishment and sample their new Sweetheart Polar Pizza Ice Cream, from 3 p.m. to 7 p.m. in participating locations. Hey, you know what they say — don't knock it 'til you try it!

California Pizza Kitchen

On a health kick? You don't have to feel left out, as California Pizza Kitchen will be offering a free upgrade to their new low-carb Cauliflower Pizza Crust. Trust us on this one — you won't even taste a difference.

Little Caesars

Spice up your average regular pie with Little Caesars' "ExtraMostBestest" option — including more cheese and pepperoni — for just one extra dollar. Wow!

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Round Table Pizza

Now here is where the "free" is! From 2 p.m. until 5 p.m., customers have the opportunity to enjoy a free personal pizza — either cheese or pepperoni — with the purchase of a fountain drink. Find a location near you on their website.

Blaze Pizza

What's better than just one pizza? One pizza plus one FREE pizza, of course! To mark the occasion, sign up on the create-your-own shop's website to order your own and get one free!

Pizza Hut

Rewards members can receive 30 percent off their menu-priced pizza orders. They also have a special for two medium, two-topping pizzas for just $5.99.

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Papa John's

The prestigious eatery is offering a $7.99 carryout special on large or pan two-topping pizzas. If that's not enough pizza — and let's be real, there's never enough — you can opt for the $10 duel layer pepperoni pizza.