Tomorrow is National Root Beer Day and if you're a Coloradan you better be celebrating, because Colorado invented the root beer float.

That's right, the Centennial state is famous for more than just craft beer. According to Sarah Cagle of Pop Sugar, the drink is credited to Frank Wisner, owner of the Cripple Creek Cow Mountain Gold Mining Company in Colorado.

He is said to have thought of the idea for the concoction in 1893, when he was gazing at the full moon over the mountains. The moon reminded him of a scoop of ice cream, and he immediately came up with the brilliant idea of putting ice cream in his root beer sodas.

The drink quickly became a local hit, and now we get to enjoy them today. Thanks, Frank.

So, what better way is there to celebrate this soft drink holiday than with A&W, the restaurant known for having its root beer on draft?

In honor of the holiday, the restaurant is giving out free small root beer floats from 2 p.m. to 8 p.m. tomorrow (August 6) with no purchase necessary. OMG.

In case you want to take advantage of this deal, here are the  A&W locations in the Northern Colorado area:

1. Fort Collins

4001 S College Ave. 80525

2. Windsor

1590 Main St. 80550

3. Greeley

2804 W 10th St. 80634

4. Eaton

680 Oak Ave. 80615

5. Berthoud

802 Mountain Ave. 80513

As you can see, there is no shortage of this restaurant chain. Enjoy your free root beer float.