Oops, it doesn't look like 'ass eatin day' is a national day..

Other days

ponytail

Ponytail Day
self care

Self Care Day
fiancee

Fiancee Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
bounce

Bounce Day
stud

Stud Day
first love

First Love Day
cursing

Cursing Day
youth

Youth Day