National Avocado Day is Wednesday, July 31. Chipotle is giving free guacamole to anyone who purchases an entrée through the Chipotle app or Chipotle.com. A $10 delivery minimum applies for delivery orders. The deal cannot be combined with other offers, but it can be claimed with a Chipotle Rewards entrée. The Mexican restaurant chain typically charges around $2 for a side of guacamole. Avocado prices have steadily increased every year so act fast!