Happy National Puppy Day! Prepare yourself for an overdose of cuteness all over social media, because Today March 23 is National Puppy Day! Established in 2006, National Puppy Day is a paw-some day for all dog enthusiasts to celebrate unconditional love and fawn over the undeniably cute furballs that bring so much happiness into this world. Even the stinky ones. While we’re all big babies when it comes to our four-legged pups. we use the day also to raise awareness about puppy mills and help prospective pet owners consider adoption.