Dog Day is celebrated annually on August 26th to raise awareness about dog adoption and honor the important role dogs play in our lives. It was founded in 2004 by animal advocate Colleen Paige. The main purpose is to encourage pet adoption from shelters and rescue organizations. Dog Day is also a day to appreciate the unconditional love and loyalty that dogs bring. Ways to celebrate include visiting animal shelters, organizing dog-friendly community events, and sharing pictures on social media to promote responsible pet ownership.