National Pets for Veterans Day is observed in the United States every October 21. This day was established to commemorate the founding of the non-profit organization Pets for Vets, which connects military veterans with shelter animals in need of homes. The initiative addresses the mental health challenges faced by veterans, particularly those suffering from PTSD, by promoting the benefits of pet ownership, such as alleviating loneliness and providing companionship. Founded by animal behaviorist Clarissa Black in 2009, Pets for Vets rescues and trains shelter dogs to match them with veterans, helping both parties find stability and support. On this day, individuals are encouraged to donate to charities that assist veterans or homeless animals, volunteer at local shelters, and promote the cause on social media using hashtags like #NationalPetsForVeteransDay and #PetsForVets.