Chipotle Mexican Grill has been serving burritos, tacos and other Mexican-inspired dishes for over three decades. The fast-casual chain has launched countless creative marketing campaigns, from partnering with brands like Strava to giving away $1 million in free burritos.

Chipotle is giving out codes to customers who pick the correct combination each hour. The popular Mexican fast-food restaurant will be giving over $1 million worth of free burritos ahead of National Burrito Day on Thursday,

Chipotle is once again giving away free meals in celebration. Last year, the restaurant chain launched an interactive game called the Burrito Vault in which players were tasked with guessing the ingredient order for a Chipotle burrito.