National coffee day 2021 is Wednesday, Sept. 29 --and a number of chains are offering freebies to help you celebrate. Let's put all those rewards clubs to use. RetailMeNot released a report including several chains offering deals for National Coffee Day. If you don't feel like checking out their list, feel free to view this abbreviated version of their list below. 7-Eleven: 7Rewards loyalty members can get a free hot coffee, any size. Circle K: Will celebrate National Coffee