Last day for 20% Groupon code Posted on July 7, 2018 by The Goddess deranged.me posts may contain affiliate links; I will be compensated if you make a purchase after clicking that link. See disclosure policy under The Legal Stuff. Last day for promo code on Groupon: HOT20 takes another 20% off your Local Groupon deals. Valid on 1 unit per transaction; max 3 local deals. Up to $30 discount per deal. Ends 7/7. Exclusions apply.