Doug the Pug Day is observed in Nashville, Tennessee, every May 20, celebrating Doug the Pug, the most followed pug on the internet. This holiday honors Doug, who was born on May 20 and gained fame through an Instagram account created by his owner, Leslie Mosier, in 2014. Doug's popularity stems from his expressive face, elaborate costumes, and anthropomorphized persona, which often references pop culture. The day was officially declared by Nashville Mayor David Briley in 2019, coinciding with National Rescue Dog Day, which promotes dog adoption. Celebrations typically include enjoying pizza and relaxing, as encouraged by Mosier. Doug has also made significant contributions through the Doug the Pug Foundation, which supports children battling cancer and other serious illnesses.