Muddy Dog Day is celebrated on October 31st and encourages dog owners to share photos of their muddy pets, highlighting the joy and messiness that dogs can bring into their lives. Founded by Jo Milnes, the owner of Distinctive Pets in the United Kingdom, the day originated during the pandemic as a way for people to connect online through pictures of their playful, muddy dogs. Participants are encouraged to take their dogs outside to enjoy muddy adventures and then share the resulting photos on social media using the hashtag #MuddyDogDay. In addition to sharing photos, those without dogs can enjoy viewing pictures of other muddy canines online. A fun treat associated with the day is making "Muddy Buddies," a human snack made from cereal and a chocolate-peanut butter mixture. Overall, Muddy Dog Day celebrates the carefree and playful spirit of dogs while also allowing owners to embrace the mess that comes with them.