National Dog Day is celebrated August 26th annually and was founded in 2004 by Pet & Family Lifestyle Expert, Animal Rescue Advocate, Conservationist, Dog Trainer and Author, Colleen Paige, also the founder of many other holidays such as National Puppy Day, National Mutt Day, National Cat Day, National Wildlife Day and many more philanthropic days to bring attention to the plight of animals around the globe and encourage adoption.