Oops, it doesn't look like 'check your junk day' is a national day..

Other days

ride the wind

Ride The Wind Day
slime

Slime Day
pampering

Pampering Day
lumpy rug

Lumpy Rug Day
cat girl

Cat Girl Day
my little pony

My Little Pony Day
me

Me Day
buddy

Buddy Day
ruby

Ruby Day
stud

Stud Day