Dress Up Your Pet Day
Dress Up Your Pet Day is held on January 14. This event in the second decade of the month January is annual. 
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Today many of you will be dressing up your dogs, cats, hamsters, rabbits or guinea pigs in order to celebrate this holiday – unless you’re like me and have a snake then you sadly will have a hard time of partaking. Dress Up Your Pet Day falls on January 14 every year, and it was founded in 2009 by Celebrity Pet Lifestyle Expert and Animal Behaviorist, Colleen Paige.
People have different reasons for dressing up their pets. Some do it so their pet isn't left out, some so they get positive reactions on social media, others simply just think their pet looks cute and enjoy the sense of occasion a costume helps create.
One of the top reasons to dress up your dog is to stay warm. Some dogs simply aren't built for cold weather. Puppies, senior dogs, small dogs, and shorthaired dogs are perfect candidates for sweaters, jackets, and other canine clothing that will help shield them from the elements.
Similar holidays and events, festivals and interesting facts
Make Your Dream Come True Day on January 13
Rubber Duckie Day on January 13
Coming of Age Day or Seijin Shiki or 成人式 in Japan on January 13 (celebrated on the second Monday of January);
National Hypersensitivity Day in France on January 13 (Journée nationale de l'hypersensibilité);
Feast of the Ass on January 14
Poetry At Work Day on January 14 (finding the beauty in your job and putting it into some form of artful prose);
Clean Off Your Desk Day on January 14
Organize Your Home Day on January 14
Wintering Birds Day in Russia on January 15
Hat Day on January 15
Museum Selfie Day on January 15 (Held on the third Wednesday of January)