The coolest holiday of the summer has finally arrived: National Ice Cream Day. U.S. President Ronald Reagan created the observance in 1984, saying it was the "perfect dessert and snack food," and who wouldn't agree? Sunday affords Americans the perfect opportunity to grab cones -- and some napkins -- and enjoy the icy treats.

Several restaurant chains are running specials to celebrate National Ice Cream Day. Take a look at a few of the best deals below:

Carvel: Buy one cup or cone of soft-serve ice cream, get one free Sunday.

Baskin-Robbins: Get a free waffle-cone upgrade with the purchase of any double scoop of ice cream Sunday. And, later in the month, celebrate the company's birthday with 31 percent off all sundaes July 31.

Friendly's: Buy one $1.99 single-scoop cup or cone of ice cream, get one free all weekend long.

Breyers: If you find yourself at a Six Flags, visit a Six Below shop for a free upgrade to a sundae with any cup of double-scoop ice cream Sunday. You'll also get a single-scoop ice cream sundae -- but only if you're one of the first 200 guests to ask for it between noon and 5 p.m.

Cold Stone Creamery: No deals just for National Ice Cream Day, but join the My Cold Stone Club to get a buy-one, get-one free Creation coupon.

Dippin Dots: Employees will hand out samples of their new flavor, Redberry Sherbet, at all locations. Order two gallons online and get one free -- plus free shipping -- with the code NICD2015.

Monkey Joe's: This play gym with locations in 16 states will give out free ice cream to all customers while supplies last Sunday.

Sonic: Like Cold Stone, Sonic isn't doing anything special for National Ice Cream Day, but take advantage of its summerlong deal for half-price milkshakes after 8 p.m.

Your Pie: This chain is celebrating National Ice Cream Day in a different way, by giving out free gelato. You can find locations in states such as Arizona, Florida, Georgia, Illinois and Tennessee.

Lyft: If you employ Lyft to travel to a participating indie ice cream shop -- including two in New York and three in San Francisco -- you can get a free scoop by showing the cashier your receipt.

Graeter's: Head to a Graeter's location -- primarily in Ohio -- to get a $1.45 cone Sunday. It's not only National Ice Cream Day but also Graeter's 145th birthday.

Bruster's: Bruster's doesn't have any Sunday-only specials, but if you join the e-club, you can get a free small sugar cone, cake cone or dish with a waffle-cone purchase.

PetSmart: Your dog deserves to chill, too. Canines can get four-ounce servings of dog ice cream for free at PetSmart locations with PetsHotel boarding centers.