Ice Cream
Tubs of ice cream are displayed at Swensen's Ice Cream shop in San Francisco, California, July 5, 2007. Getty Images

National Ice Cream Day is observed each year on the third Sunday of July, making it the coolest holiday for the dessert lovers to get free treats and discounts. Former President Ronald Reagan observed this day first in 1984, and said ice cream was the "perfect dessert and snack food."

Many restaurant chains offer huge discounts on ice creams on this day, while others lure their customers with freebies.

Read: Eating Ice Cream For Breakfast May Improve Mental Performance And Alertness, Study Says

According to International Dairy Foods Association, the ice cream industry contributes more than $39 billion to the national economy every year. It also creates more than 188,000 jobs in communities across the country. The official website of the IDFA, that represents the nation's dairy manufacturing and marketing industries, also gives details on the history of ice cream.

Every year, the IDFA organizes an annual Capitol Hill Ice Cream Party following the onset of summer, where more than 1,500 gallons of ice cream and frozen yogurt are made available. For this celebration, nineteen companies donate products and over 70 flavors are tasted.

Here are all the brands that are offering special deals on the National Ice Cream Day on Sunday.

16 Handles: Get free four-ounce order from 12 p.m. to 5 p.m. just by downloading the frozen yogurt chain's mobile app, to get your coupon.

Carvel: 'Buy one, get one' offer for any size cup or cone.

Dippin' Dots: Get free mini cups of ice cream for two hours. Check with your local Dippin' Dots store to find out the timings.

Friendly's: Customers who purchase a Friend-z on Sunday will get a coupon for a free ice cream for another day.

Baskin Robbins: Download the mobile app before July 16 to get exclusive offers on the National Ice Cream Day.

Krystal: The fast food chain will offer sundaes for only 99 cents between July 16 and July 23.

Monkey Joe's: Everybody coming to Monkey Joe's indoor play centers on the National Ice Cream Day will get free ice cream cups.

Subzero: Get a free order of Subzero's liquid nitrogen ice cream with the purchase of one ice cream at regular price between 2 p.m. and 6 p.m.

PetSmart: Why should humans have all the fun, all pets visiting PetSmart PetHotel locations will get free Doggie Ice Cream Sundaes.

Read: How To Get Free Chocolate Ice Cream For Its National Day

Your Pie: All the customers at the pizza store will get a free gelato.

McDonald's: Download the McDonald's mobile app to redeem a free vanilla soft serve cone on July 16.

Cold Stone Creamery: To get a 'buy one, get one' offer you need to join the rewards program and receive an emailed coupon.

Bruster's: Get a free small sugar cone, cake cone or dish with a waffle-cone purchase by joining the e-club.