I've got some good news for you if you currently have flip flops on your feet. Today, May 31, is National Flip Flop Day. Did you know that was a holiday? Me neither. But it doesn't matter because you can get a free smoothie at Tropical Smoothie Cafe just for wearing flip flops right now.

How to get a free smoothie at Tropical Smoothie Cafe for wearing flip flops

For today and today only from 2 p.m. to 7 p.m. local time, head over to your local Tropical Smoothie Cafe in flip flops. Show them your exposed toes, and you'll receive one free 12-ounce Strawberry Margarita smoothie at participating locations. That's it. No catch or purchase necessary. 

The Strawberry Margarita Smoothie is totally alcohol free, despite its name. It comes with strawberries, a fresh lime wedge, lime juice, and orange juice to cool you down in the incoming summer heat. You'll also have the chance to try some other mocktails at Tropical Smoothie Cafe like the Island Punch Smoothie and the Watermelon Mojito Smoothie.

If you do have a little to give, the smoothie chain is partnering with No Kid Hungry, a national campaign working to end child hunger, and collecting voluntary donations.

"This National Flip Flop Day, Tropical Smoothie Cafe is on a mission to make life a beach all summer long. Through our annual celebration we hope to inspire guests to slow down, enjoy a smoothie and some time with friends and family,"  Charles Watson, CEO of Tropical Smoothie Café, said in a press release. "By encouraging our guests to step into Tropic Time, we are giving them the chance to take a few minutes to escape to an everyday getaway. Something we all need."