Oops, it doesn't look like 'reply guy day' is a national day..

Other days

kale

Kale Day
youth

Youth Day
cursing

Cursing Day
self care

Self Care Day
artists

Artists Day
lisp

Lisp Day
bubble bath

Bubble Bath Day
brow

Brow Day
nae nae

Nae Nae Day
frozen yogurt

Frozen Yogurt Day