1.
This cool dude kept it casual all day today.
2.
Moose, who likes to keep pop culture relevant.
3.
But he also keeps it timeless in his caterpillar costume.
4.
This guy who just got a job and tried on his new wardrobe today.
6.
This little lady who spends the year in anticipation of Christmas.
7.
These guys who love "Dress up your pet day" more than anything in the world.
8.
This bunny who understands the "less is more" mantra.
9.
This little lady who loves to use this day to be her true, princess self.
10.
This dominatrix is thankful for today to show her true colors.
11.
This loving advocate.
12.
This chameleon who chose to use this day to remind us all that they're no different than our fuzzy friends.
13.
This little guy who puts up with his little sisters' dress up requests out of love.
14.
"The Most Interesting Dog in the World"
15.
This superhero puggle (is there any other kind though?)
16.
This gal who's just thankful she can look so fabulous on her sweet sixteen.
17.
This bro kept it simple and fresh.
18.
This pug who only chose this costume because it fits right now but she's trying to make the most of it.
19.
This little guy who's living up to his name.
20.
This lady who's living out her underwater dreams today.
21.
This dapper gentleman, by name and look.
22.
This guy who got really confused today. Is he a frog or a dog? He may never know.
23.
This grumpy Bunny who would rather eat berries than be one but you know what? SHE'S A TEAM PLAYER.
24.
Max, who dresses up like this every day but was willing to pose for the occasion.
25.
Shoes were not the most popular choice among participants but this little lady chose to be practical.
26.
This guy came to represent non furry friends!
27.
This hard core Sk8er Boi.
28.
This adorable creature who travelled internationally to celebrate this festive day.
29.
This man who doesn't care what you say, this t-shirt from his teen years still fits perfectly.
30.
This goober who didn't even care it's not Halloween, this is his one outfit and you can deal.
31.
Jefferson, who used today to celebrate the strong women of history.
32.
OMG THIS CUTIE WITH HIS SMUSH HE DIDN'T EVEN NEED TO DRESS UP I'M DYING.
34.
These two brothers who use this day to celebrate working out their toy issues.
35.
This little chick who kept it simple and delightful in a polka dot number.
36.
This gal who has been studying for weeks but still managed to dress up for the occasion.
37.
This Queen of the "Dress Your Pets Up" Day.
38.
But queen or not, anyone who kept a cool attitude is the true winner.
Thanks to followers of @BuzzfeedAnimals for submitting many of these cuties! If you missed it, add yours in the comments!