Money Carl’s Jr. will have a special $4.20 CBD burger for 4/20. Here’s where to get it. April 18, 2019 Kelly Tyko, USA TODAY Comments Off on Carl’s Jr. will have a special $4.20 CBD burger for 4/20. Here’s where to get it. Only on Saturday, April 20, and only at one Denver location, the fast-food chain will have a special burger that includes a CBD-infused sauce.