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

Other days

believe

Believe Day
lisp

Lisp Day
buddy

Buddy Day
one

One Day
boy friend

Boy Friend Day
ormille

Ormille Day
frozen yogurt

Frozen Yogurt Day
slime

Slime Day
self appreciation

Self Appreciation Day
reading

Reading Day