Of course National Ice Cream Day is in the summer, the perfect summer treat.

Check out some of these deals for Ice Cream Day from thrillest.com
Carvel

The deal: Buy one get one free soft serve ice cream cones. Any size, any soft serve flavor.

When: July 19th ( I've never heard of this place but for the out of staters here ya go)

Cold Stone Creamery

The deal: Members of the My Cold Stone Club (free rewards club) can get a free ice cream "creation" with the purchase of one. The deal also applies to Cold Stone's shakes, smoothies, and its new frappés.
When: July 19th.

Friendly's
The deal: To celebrate both its 80th birthday (July 18th) and National Ice Cream Day, participating Friendly's locations will give you a free scoop of ice cream in a cup or a cone, when you buy one for $1.99.
When: Starting at 11am July 18th through July 19th.

Dippin' Dots
The deal: Participating Dippin' Dots franchise locations (at malls and shopping centers) will be handing out free samples of its newest flavor, Redberry Sherbet, which is made with Sour Patch Kids.
When: July 19th.

Marble Slab Creamery
The deal: Get $3 off your entire purchase (one time only), when you use Marble Slab's Slab Happy Rewards app.
When: All of July.

Baskin-Robbins
The deal: Free upgrade to waffle cone on double scoop ice cream cones.
When: All of July

Another deal: As it continues to celebrate its 70th birthday and the end of National Ice Cream Month, Baskin-Robbins is taking 31 % off all Ice cream sundaes at participating stores.
When: July 31st.

Graeter's
The deal: In celebration of its 145th birthday, which happens to fall right on National Ice Cream Day, Graeter's shops are offering $1.45 cones.
When: July 19th.

Dairy Queen
The deal: This one's a big question mark. Since most DQ's are independently owned and operated, we were told National Ice Cream Day revelers should call their local outpost to find out about scoring any deals.
When: July 19th.