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

Other days

boy friend

Boy Friend Day
martini

Martini Day
donate your hair

Donate Your Hair Day
lash

Lash Day
gum

Gum Day
one

One Day
ponytail

Ponytail Day
bow tie

Bow Tie Day
azonto is acceptable

Azonto Is Acceptable Day
youth

Youth Day