That’s why on June 21, between 2pm and 6pm at participating locations, Taco Bell is giving away a free Doritos Locos taco to all who want one. And yes, you can pick your favorite Doritos Locos flavor: Fiery Doritos, Cool Ranch, or original Nacho Cheese. Even though the Cavaliers won game 5 in Oakland on Monday night, to stay alive in the NBA finals series, that doesn’t mean fans get yet another free taco day, as the rules only allow for the June 21st date.