Oops, it doesn't look like 'cat oatmeal hermit day' is a national day..

Other days

youth

Youth Day
eat what you want

Eat What You Want Day
brow

Brow Day
first love

First Love Day
reading

Reading Day
emoji

Emoji Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
self care

Self Care Day
lisp

Lisp Day