Wayback Burgers are giving away free milkshakes for the first day of summer 2018.
The are giving away one free 12 oz. Black and White milkshake on June 21 from 10:30 a.m. until close while supplies last.
You don’t have to buy anything.
June 21 is also National Selfie Day and they are encouraging customers to share shake selfies using the hashtag #FreeShakeDay.