National Lost Dog Awareness Day April 23rd. This day was created to bring awareness to the dogs that go missing & celebrate the reunions. Through networks of shelters, veterinaries, social media and other sources, many lost canines are reunited with their loved ones. National Lost Dog Awareness Day is an opportunity to learn more about prevention and networking. A Dog Microchip is permanent identification and contact, name tag with contact information & current rabies tag all help reunite a pet.